bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rebel with a cause: When does employee rebelliousness relate to creativity?
Authors: Petrou Paraskevas , van der Linden Dimitri , Mainemelis Charalampos , Salcescu Oana Catalina 
Published: July 2020

Although the literature implies that rebelliousness can be a precursor of creative behaviour, this assumption has rarely been tested empirically. In the present study, we hypothesized that trait‐level rebelliousness may have an inverted U‐shaped relationship with creativity. Additionally, we expected that the effect is pronounced under two conditions, namely when individuals strive for success (i.e., high promotion focus) or when they are not failure‐avoidant (i.e., low prevention focus). We conducted a three‐wave weekly survey study among a heterogeneous sample of 156 employees. The results suggested that the expected non‐linear relation rebelliousness–creativity occurred under high promotion focus, but we did not find a direct link between rebelliousness and creativity. Furthermore, prevention focus did not moderate the non‐linear link. Additional analyses revealed that rebelliousness has a linear link with creativity when promotion focus is high and, at the same time, prevention focus is low. Our study reveals that rebelliousness in itself is not sufficient to unlock creativity. Instead, we uncover promotion focus as the condition that amplifies the link between moderate rebelliousness and creativity. Additionally, when employees simultaneously focus on promotion and refrain from prevention, the more rebellious they are, the more creativity they report.Practitioner points

Employee rebelliousness is not necessarily an obstacle for organizations; when displayed by employees who want to achieve positive outcomes, it can be a creative force.

When employees are moderately rebellious, this can best be coupled with a high promotion focus, so that the potential for creativity is maximized.

When employees are more than moderately rebellious, this can best be coupled with both high promotion focus and low prevention focus, so that the potential for creativity is maximized.
Magnetic resonance imaging analysis of long‐term neuropathology after exposure to the nerve agent soman: correlation with histopathology and neurological dysfunction
Authors: Reddy Sandesh D. , Wu Xin , Kuruba Ramkumar , Sridhar Vidya , Reddy Doodipala Samba 
Published: July 2020

AbstractNerve agents (NAs) produce acute and long‐term brain injury and dysfunction, as evident from the Japan and Syria incidents. Magnetic resonance imaging (MRI) is a versatile technique to examine such chronic anatomical, functional, and neuronal damage in the brain. The objective of this study was to investigate long‐term structural and neuronal lesion abnormalities in rats exposed to acute soman intoxication. T2‐weighted MRI images of 10 control and 17 soman‐exposed rats were acquired using a Siemens MRI system at 90 days after soman exposure. Quantification of brain tissue volumes and T2 signal intensity was conducted using the Inveon Research Workplace software and the extent of damage was correlated with histopathology and cognitive function. Soman‐exposed rats showed drastic hippocampal atrophy with neuronal loss and reduced hippocampal volume (HV), indicating severe damage, but had similar T2 relaxation times to the control group, suggesting limited scarring and fluid density changes despite the volume decrease. Conversely, soman‐exposed rats displayed significant increases in lateral ventricle volumes and T2 times, signifying strong cerebrospinal fluid expansion in compensation for tissue atrophy. The total brain volume, thalamic volume, and thalamic T2 time were similar in both groups, however, suggesting that some brain regions remained more intact long‐term after soman intoxication. The MRI neuronal lesions were positively correlated with the histological markers of neurodegeneration and neuroinflammation 90 days after soman exposure. The predominant MRI hippocampal atrophy (25%) was highly consistent with massive reduction (35%) of neuronal nuclear antigen–positive (NeuN+) principal neurons and parvalbumin‐positive (PV+) inhibitory interneurons within this brain region. The HV was significantly correlated with both inflammatory markers of GFAP+ astrogliosis and IBA1+ microgliosis. The reduced HV was also directly correlated with significant memory deficits in the soman‐exposed cohort, confirming a possible neurobiological basis for neurological dysfunction. Together, these findings provide powerful insight on long‐term region‐specific neurodegenerative patterns after soman exposure and demonstrate the feasibility of in vivo neuroimaging to monitor neuropathology, predict the risk of neurological deficits, and evaluate response to medical countermeasures for NAs.
Politics, Competence, and Performance: Evidence from the US State Budget Agencies
Authors: Yu Jinhai , Jennings Edward T. 
Published: July 2020

AbstractThe relationship between administrative competence and political responsiveness is central to public administration theories. This study examines the conditional effects of competence on performance as moderated by politics. Synthesizing the theories of neutral competence and responsive competence, we propose a model of contingent competence. We argue that the impact of competence on performance is conditional on both the preferences of political principals and the degree of political control as indicated by agency politicization. With multiple indicators of state fiscal performance, the empirical test uses data on US state budget agencies between 1986 and 2008. The results support the proposition. When budget agencies are highly politicized, competence of budget agencies influences state fiscal performance in accordance with the preferences of Democratic and Republican elected officials when one or the other party controls state governments. The findings enhance the understanding of how institutional designs shape bureaucratic politics and agency performance.
Momentum transfer in hypervelocity cratering of meteorites and meteorite analogs: Implications for asteroid deflection
Authors: Flynn George J. , Durda Daniel D. , Molesky Mason J. , May Brian A. , Congram Spenser N. , Loftus Colleen L. , Reagan Jacob R. , Strait Melissa M. , Macke Robert J. 
Published: July 2020

Abstract
Asteroid porosity ranges from 0 to &gt;50%, with most &gt;20%, and some asteroids exhibit a water feature in their reflection spectra. Porosity and hydration are expected to influence the momentum transferred in hypervelocity collisions. We conducted a series of measurements of the post-impact momentum, characterized by a factor β, the ratio of the total linear momentum acquired by the target to the momentum of the impactor. We measured β for anhydrous meteorites, samples of their asteroidal parent bodies, spanning a wide range of porosities: 7 samples of the CV3 carbonaceous chondrite Northwest Africa (NWA) 4502 (2.1% porosity), 7 samples of the ordinary chondrite NWA 869 (6.4% porosity), and 4 samples of the ordinary chondrite Saratov (15.6% porosity), as well as 2 samples of terrestrial pumice (80% porosity). We also measured hydrous meteorite analog targets, including 2 samples of terrestrial serpentine (17.9% porosity) and 4 samples of terrestrial montmorillonite (51.5% porosity), the two clay minerals that dominate the composition of the hydrous CI carbonaceous chondrite meteorites, as well as 4 samples of hydrous meteorite analog material prepared by powdering and hydrating an anhydrous carbonaceous chondrite. We found that for both anhydrous and hydrous samples β decreased with increasing porosity, consistent with hydrocode modeling. The β for each target type was &gt;2 demonstrating that crater ejecta makes a significant contribution to recoil in hypervelocity collisions.. The β values we measured for the anhydrous samples are larger, with β = 3.55 for NWA 4502, 2.69 for NWA 869, 2.10 for Saratov, and 2.15 for pumice, than results from hydrocode modeling for 10 km/s impacts into relatively strong, porous rock targets. The momentum enhancement by ejecta (β - 1) for the moderate porosity (17.9%) hydrous serpentine targets (β = 4.70), the highly porous (51.55% porosity) hydrous montmorillonite targets (β = 2.79), and the intermediate porosity (~26%) CI-analogs (β = 2.99) are much larger than β value for anhydrous targets of similar porosity, indicating jetting of water vapor could significantly affect deflection of hydrous asteroids and comets in natural or human-induced collisions.
Corning0120 High-Lead Glass Subject to Shock Loading
Authors: Farfan Bernardo , Reinhart William , Alexander Scott 
Published: July 2020

Abstract
Equation of state properties were studied for the high-lead glass Corning 0120, which is a potash-soda-lead glass also referred to as G12. This glass, which contains approximately 30% PbO by weight and has a density, ρo, of 3.034 g/cm3 possesses properties suitable for many applications in industry such as optical components for space exploration instrumentation. Further understanding of its mechanical properties is desired for more complex applications in various fields, including applications where the glass may experience high-pressure shock loading. In this work plate impact experiments were conducted to determine the dynamic response of Corning 0120 at high stress levels. Tests were conducted over the pressure range from approximately 5 to 24 GPa utilizing the 90 mm bore single-stage powder driven gas gun at the Sandia National Laboratories STAR Facility. For this study, we used one-inch diameter Corning 0120 glass samples of two different thicknesses (3 mm and 7 mm) to use the evolution of the shock wave propagation through the material for analysis. The time-resolved material response was measured by means of a Velocity Interferometer System for Any Reflector system (VISAR). Results will be presented detailing the high-pressure shock loading response characteristics of the high-lead glass Corning 0120. Comparisons are made with similar results for lead free glass to assess the most prominent changes compared to lower density glasses and other lead filled glasses.
Impact Modeling for the Double Asteroid Redirection Test Mission
Authors: Rainey Emma S.G. , Stickle Angela M. , Cheng Andrew F. , Rivkin Andrew S. , Chabot Nancy L. , Barnouin Olivier S. , Ernst Carolyn M. ,   the AIDA/DART Impact Simulation Working Group
Published: July 2020

Abstract
The Asteroid Impact Deflection Assessment (AIDA) collaboration is a joint ESA-NASA planetary defense collaboration that will include the first full-scale test of an asteroid deflection by kinetic impactor [1]. The AIDA collaboration comprises two independent spacecraft, the NASA-sponsored Double Asteroid Redirection Test (DART) and the ESA-led Hera. In September 2022 the DART spacecraft will impact the secondary member of the binary asteroid system 65803 Didymos (Didymos-B) at a speed of ~6.7 km/s and mass ~500 kg. The resulting period change in the orbit of Didymos-B will be measured using Earth-based observations. Hera will arrive post-impact and perform detailed measurements to characterize Didymos-B.
HyFIRE: Hypervelocity Facility for Impact Research Experiments at Johns Hopkins University
Authors: Simpson Gary , Shaeffer Matthew , Ramesh K.T. 
Published: July 2020

Abstract
The Hopkins Extreme Materials Institute (HEMI) recently installed a hypervelocity impact facility (HyFIRE) including a two-stage light gas gun at Johns Hopkins University in Baltimore, MD. The HyFIRE launcher has a launch tube bore diameter of 7.62 mm and is designed to attain launch velocities up to 7 km/s. The enclosed ballistic range and terminal test chamber provide multiple axes with which to view both projectile free flight and terminal impact, maximizing diagnostic access to events of interest.
Initial test diagnostics include ultra-high-speed optical video and orthogonal 300 kV flash x-ray imaging. Photon doppler velocimetry for surface velocity measurement—currently used in HEMI’s laser shock facility—as well as emission spectroscopy/pyrometry are planned, providing researchers across multiple disciplines with the ability to investigate the coupling of mechanics, physics and chemistry present in high energy density impact events. Initial experiments at the facility investigate the fragmentation of inert impactors on anvil targets, with an aim towards identifying the dominant mechanisms controlling the fragmentation characteristics, temperature distributions and trajectories of generated debris fields.
Hypervelocity Impact on Concrete and Sandstone: Momentum Enhancement from Tests and Hydrocode Simulations
Authors: Chocron Sidney , Walker James D. , Grosch Donald J. , Beissel Stephen R. , Durda Daniel D. , Housen Kevin R. 
Published: July 2020

Abstract
Concrete, sandstone, and, in a previous round of experiments, pumice, were tested under hypervelocity impact at SwRI. Aluminum spheres with diameters of 1 and 1.75 in were shot at a velocity of approximately 2 km/s using a 50-mm conventional powder gun. The targets were mounted on a swing so that the momentum enhancement could be measured. The size effect, i.e. comparing momentum enhancement generated by the small and large projectiles, was of particular interest in this project. The targets were also scaled, although for sandstone we were limited by the natural geometry of the rocks. The results from the experiments show a clear size effect for the concrete while sandstone did not show any size effect, possibly because of experimental artifacts. The sandstone behavior was investigated with computations using the EPIC hydrocode. The porosity and compressive strength of the sandstone used in the impact tests were measured and reported. The rock is very similar to one reported and extensively tested by Lawrence Livermore Laboratory in 1974. Two material models (Holmquist-Johnson Concrete and Johnson-Holmquist-Beissel) were fit to the data from LLL. The momentum enhancement predicted by the code is reported for different parameter studies.
Validation of an Improved Contact Method for Multi-Material Eulerian Hydrocodes in Three-Dimensions
Authors: Walls Kenneth C. , Littlefield David L. 
Published: July 2020

Abstract
Realistic and accurate modeling of contact for problems involving large deformations and severe distortions presents a host of computational challenges. Due to their natural description of surfaces, Lagrangian finite element methods are traditionally used for problems involving sliding contact. However, problems such as those involving ballistic penetrations, blast-structure interactions, and vehicular crash dynamics, can result in elements developing large aspect ratios, twisting, or even inverting. For this reason, Eulerian, and by extension Arbitrary Lagrangian-Eulerian (ALE), methods have become popular. However, additional complexities arise when these methods permit multiple materials to occupy a single finite element.
Conical impact fragmentation test (CIFT)
Authors: Neel Christopher , Sable Peter , Flater Philip , Lacina David 
Published: July 2020

Abstract
Conical impact fragmentation tests (CIFT) were conducted to develop and demonstrate an experimental capability for uniformly inducing controlled fragmentation in structural metals. The setup involves a conical specimen impacting a mating conical target (similar in geometry to a funnel) at nominal velocities of 1 - 2 km/s. Three experiments were conducted as proof of concept to characterize the fragmentation behavior of 1018 steel. Photonic Doppler velocimetry probes on the free outer surface of the target cone allow for validating simulations that can indicate strain uniformity in the target cone. Overall, experimental results demonstrate CIFT to be a feasible method to evaluate fragmentation behavior. The conical geometry produces consistent and bounded strain rates that are maintained for at least 10 microseconds. Furthermore, when compared with other laboratory techniques, the CIFT technique is shown to be more ideal than sphere-on-plate impact (SPI) and more tunable than cylinder expansion (CYLEX), and so is a promising fragmentation characterization tool.
Quasi-homologous evolution of self-gravitating systems with vanishing complexity factor
Authors: Herrera L. , Prisco A. Di , Ospino J. 
Published: July 2020

AbstractWe investigate the evolution of self-gravitating either dissipative or non-dissipative systems satisfying the condition of minimal complexity, and whose areal radius velocity is proportional to the areal radius (quasi-homologous condition). Several exact analytical models are found under the above mentioned conditions. Some of the presented models describe the evolution of spherically symmetric dissipative fluid distributions whose center is surrounded by a cavity. Some of them satisfy the Darmois conditions whereas others present shells and must satisfy the Israel condition on either one or both boundary surfaces. Prospective applications of some of these models to astrophysical scenarios are discussed.
Prognostic Value of Cardiac Magnetic Resonance–Derived Right Ventricular Remodeling Parameters in Pulmonary Hypertension
Authors: Dong Yang , Pan Zhicheng , Wang Dongfei , Lv Jialan , Fang Juan , Xu Rui , Ding Jie , Cui Xiao , Xie Xudong , Wang Xingxiang , Chen, MD Yucheng , Guo Xiaogang 
Published: July 2020

Background
Cardiac right ventricular remodeling plays a substantial role in pathogenesis, progression, and prognosis of pulmonary hypertension. Cardiac magnetic resonance is considered an excellent tool for evaluation of right ventricle. However, value of right ventricular remodeling parameters derived from cardiac magnetic resonance in predicting adverse events is controversial.

Methods
The Pubmed (MEDLINE), Embase, Cochrane Library, Web of Science, China National Knowledge Infrastructure platform (CNKI), China Science and Technology Journal Database (VIP), and Wanfang databases were systematically searched until November 2019. Studies reporting hazard ratios (HRs) for all-cause death and composite end point of pulmonary hypertension were included. Univariate HRs were extracted from the included studies to calculate pooled HRs of each right ventricular remodeling parameter.

Results

Eight studies with 1120 patients examining all-cause death (female: 44%–92%, age: 40–67 years old, follow-up time: 27–48 months) and 10 studies with 604 patients examining composite end point (female: 60%–83%, age: 29–57 years old, follow-up time: 10–68 months) met the criteria. Right ventricular ejection fraction was the only parameter which could predict both all-cause death (pooled HR=0.95;
P
=0.014) and composite end point (pooled HR=0.95;
P
<0.001), although right ventricular end-diastolic volume index (pooled HR=1.01;
P
<0.001), right ventricular end-systolic volume index (pooled HR=1.01,
P
=0.045), and right ventricular mass index (pooled HR=1.03,
P
=0.032) only predicted composite outcome. Similar results were observed when we conducted the meta-analysis among patients with World Health Organization type I of pulmonary hypertension.

Conclusions
Cardiac magnetic resonance–derived right ventricular remodeling parameters have independent prognostic value for all-cause death and composite end point of patients with pulmonary hypertension. Right ventricular ejection fraction was the strongest prognostic factor among all the right ventricular remodeling parameters. Right ventricular mass index, right ventricular end-diastolic volume index, and right ventricular end-systolic volume index also demonstrated prognostic value.
Texts, Voices and Tapes
Authors: Raia Annachiara 
Published: July 2020

Abstract
In this paper, I seek to investigate the manifold relationships between traditional and contemporary, oral and written Swahili poetry—in the utendi and mashairi forms—and its recitation in terms of the following considerations: how have advances in technology changed the production, transmission and reception of Swahili Islamic poetry? To what extent do writing and orality coexist in a recited text? What is the nature of performer identity formation within a “discourse network” of artists—the composer (mtungaji), reader (msomaji), and singer (mwimbaji)—who, in Goffman’s words, play “participation roles” and appropriate poetry belonging to other living poets or to their own (sometimes anonymous) ancestors? In an attempt to answer these questions, I provide examples of performers and their performative craft.
La cryptographie dans les manuscrits de la collection Lmūhūb Ūlaḥbīb
Authors: Mechehed Djamel Eddine 
Published: July 2020

Résumé
Nous présentons dans cet article les notes cryptographiques trouvées dans les manuscrits de la collection Lmūhūb Ūlaḥbīb, constituée vers le milieu du XIXème siècle à Ait Ūrṯilane en petite Kabylie (Algérie). Ce travail se fonde sur une analyse minutieuse de ces manuscrits d’ auteurs algériens et andalous de périodes diverses, comprises entre le XVème et le XIXème siècle.
Direct on-the-spot detection of SARS-CoV-2 in patients
Authors: Ben-Assa Nadav , Naddaf Rawi , Gefen Tal , Capucha Tal , Hajjo Haitham , Mandelbaum Noa , Elbaum Lilach , Rogov Peter , King Daniel A , Kaplan Shai , Rotem Assaf , Chowers Michal , Szwarcwort-Cohen Moran , Paul Mical , Geva-Zatorsky Naama 
Published: July 2020

Many countries are currently in a state of lockdown due to the SARS-CoV-2 pandemic. One key requirement to safely transition out of lockdown is the continuous testing of the population to identify infected subjects. Currently, detection is performed at points of care using quantitative reverse-transcription PCR, thus requiring dedicated professionals and equipment. Here, we developed a protocol based on reverse transcribed loop-mediated isothermal amplification for the detection of SARS-CoV-2. This protocol is applied directly to SARS-CoV-2 nose and throat swabs, with no RNA purification step required. We tested this protocol on over 180 suspected patients, and compared the results to those obtained using the standard method. We further succeeded in applying the protocol to self-collected saliva samples from confirmed cases. Since the proposed protocol can detect SARS-CoV-2 from saliva and provides on-the-spot results, it allows simple and continuous surveillance of the community. Impact statement Humanity is currently experiencing a global pandemic with devastating implications on human health and the economy. Most countries are gradually exiting their lockdown state. We are currently lacking rapid and simple viral detections, especially methods that can be performed in the household. Here, we applied RT-LAMP directly on human clinical swabs and self-collected saliva samples. We adjusted the method to allow simple and rapid viral detection, with no RNA purification steps. By testing our method on over 180 human samples, we determined its sensitivity, and by applying it to other viruses, we determined its specificity. We believe this method has a promising potential to be applied world-wide as a simple and cheap surveillance test for SARS-CoV-2.