bluuebunny/crossref_metadata_2025_split huggingface dataset:
A single nucleotide polymorphism in an R2R3 MYB transcription factor gene triggers the male sterility in soybean ms6 (Ames1)
Authors: Yu Junping , Zhao Guolong , Li Wei , Zhang Ying , Wang Peng , Fu Aigen , Zhao Limei , Zhang Chunbao , Xu Min 
Published: July 2021

Abstract
Key message
Identification and functional analysis of the male sterile gene MS6 in Glycine max.

Abstract
Soybean (Glycine max (L.) Merr.) is an important crop providing vegetable oil and protein. The male sterility-based hybrid breeding is a promising method for improving soybean yield to meet the globally growing demand. In this research, we identified a soybean genic male sterile locus, MS6, by combining the bulked segregant analysis sequencing method and the map-based cloning technology. MS6, highly expressed in anther, encodes an R2R3 MYB transcription factor (GmTDF1-1) that is homologous to Tapetal Development and Function 1, a key factor for anther development in Arabidopsis and rice. In male sterile ms6 (Ames1), the mutant allele contains a missense mutation, leading to the 76th leucine substituted by histidine in the DNA binding domain of GmTDF1-1. The expression of soybean MS6 under the control of the AtTDF1 promoter could rescue the male sterility of attdf1 but ms6 could not. Additionally, ms6 overexpression in wild-type Arabidopsis did not affect anther development. These results evidence that GmTDF1-1 is a functional TDF1 homolog and L76H disrupts its function. Notably, GmTDF1-1 shows 92% sequence identity with another soybean protein termed as GmTDF1-2, whose active expression also restored the fertility of attdf1. However, GmTDF1-2 is constitutively expressed at a very low level in soybean, and therefore, not able to compensate for the MS6 deficiency. Analysis of the TDF1-involved anther development regulatory pathway showed that expressions of the genes downstream of TDF1 are significantly suppressed in ms6, unveiling that GmTDF1-1 is a core transcription factor regulating soybean anther development.
Head and body orientation of the White Stork Ciconia ciconia during incubation: effect of wind, apex predators and power lines
Authors: Zbyryt Adam , Jankowiak Łukasz , Jerzak Leszek , Tryjanowski Piotr 
Published: July 2021

AbstractIncubation behaviour is essential for understanding the reproductive success in birds. For example, the orientation of the bird is important for reducing incubation costs associated with wind or sun, but on the other hand can be modified by the perceived risk of predation. We studied the body position of incubating White Stork Ciconia ciconia in eastern Poland using a small unmanned aerial vehicle (drone). The head and body orientation of the incubating storks was non-random and modified by natural factors, mainly wind direction and speed, but also by the presence of an apex predator, the White-tailed Eagle Haliaeetus albicilla. However, head orientation during incubation in nests located on electricity poles was also modified by the presence of the power lines, probably due to disturbance in the magnetic field detected by birds. Surprisingly, although the positioning of incubating birds (mainly females) is very important for the detection of predators and for reducing energy costs, these have not previously been studied. New technologies, such as drones, make it possible to collect new, extensive information on the incubation behaviour of birds.
A New Approach for Optimization of Distributed Quantum Circuits
Authors: Dadkhah Davood , Zomorodi Mariam , Hosseini Seyed Ebrahim 
Published: July 2021

AbstractIn the present work, a novel approach was proposed to optimize the teleportation cost in Distributed Quantum Circuits (DQCs) by applying a new approach. To overcome the difficulty with keeping a large number of qubits next to each other, DQCs, as a well-known solution, have always been employed. In a distributed quantum system, qubits are transferred from a subsystem to another subsystem by a quantum protocol such as teleportation. First, we proposed a heuristic approach through which we could replace the equivalent circuits in the initial quantum circuit. Then, we used a genetic algorithm to partition the placement of qubits so that the number of teleportations could be optimized for the communications of a DQC. Finally, results showed that the proposed approach could impressively work.
Low-temperature flow-synthesis-assisted urethane-grafted zinc oxide-based dental composites: physical, mechanical, and antibacterial responses
Authors: Bukhari Jaffar Hussain , Khan Abdul Samad , Ijaz Kashif , Zahid Shahreen , Chaudhry Aqif Anwar , Kaleem Muhammad 
Published: July 2021

AbstractA novel way was adopted to graft zinc oxide (ZnO) with urethane-modified dimethacrylate (UDMA) in order to utilize them as reinforcing agents in resin-based dental composites. Experimental novel composites were synthesized having UDMA-grafted and nongrafted ZnO, at a concentration of 0 wt.%, 5 wt.%, and 10 wt.%. The same concentrations of ZnO were also incorporated in Filtek Z250 XT (3 M ESPE, USA). The antibacterial behavior was evaluated against Streptococcusmutansby direct-contact test at one, three, and seven days of incubation. The compressive strength and Vickers microhardness were tested as per ISO 9917 and ISO/CD6507-1, respectively. For abrasive wear resistance, mass loss and roughness average after tooth-brushing cycles of 24,000 at custom-made tooth-brushing simulator were evaluated using noncontact profilometer. Data analysis was carried out using post hoc Tucky’s test and nonparametric Kruskal–Wallis test. Direct contact test revealed that the antibacterial potential of novel and commercial composites was increased with an increase in the concentration of grafted ZnO as compared with nongrafted, whereby the potential was the highest at day seven. There was a significant decrease in compressive strength and Vickers hardness of commercial composites on addition of grafted ZnO while there was no significant difference in the strength of experimental novel composite. The abrasive wear of commercial and experimental composites was within clinical limits. Low-temperature flow-synthesis method was successfully employed to synthesize grafted and nongrafted ZnO. The UDMA-grafted ZnO can be incorporated into dental composites without decreasing their strength and these composites can be used to combat secondary caries.
Influence of Cold Rotary Swaging on Microstructure and Uniaxial Mechanical Behavior in Alloy 718
Authors: Klumpp Alexander , Kauffmann Alexander , Seils Sascha , Dietrich Stefan , Schulze Volker 
Published: July 2021

AbstractIn this study, the influence of cold rotary swaging on microstructure and mechanical properties of the precipitation-strengthened nickel-based superalloy 718 (Alloy 718) was investigated. The initial stages of work-hardening were characterized by means of microhardness, electron backscatter diffraction (EBSD), and X-ray diffraction (XRD) analyses. Furthermore, attention was devoted to the mechanical behavior at ambient and elevated temperature (550 °C) in uniaxial tension and compression. Rotary swaging to different true strains of maximum$$\varphi = 0.91$$φ=0.91caused a moderate increase of microhardness and enhanced markedly the load-bearing capacity in tension, giving rise to yield strength beyond 2000 MPa. The mechanical strength$$R_{p0.2}$$Rp0.2in tension subsequent to rotary swaging perfectly correlates with increasing dislocation density$$\rho $$ρestimated from XRD in the form of a Taylor-like relationship$$R_{p0.2} \propto \sqrt{\rho }$$Rp0.2∝ρ. In compression, transient stress–strain evolution without the occurrence of a clear elastic range and distinct yield phenomenon was observed. Restoration of the elastic range, accompanied by a pronounced increase of microhardness, was obtained by a post-swaging tempering treatment at 600 °C.
Special Anesthesiologic Considerations in Robot-Assisted Thoracic Surgery
Authors: Niklas Christoph , Fakundiny Bastian , Popov Anton , Walles Thorsten 
Published: July 2021

AbstractPurpose of ReviewThis review summarizes the key issues for preoperative, peri- and intraoperative, and postoperative patient management for robotic-assisted thoracic surgery (RATS). It provides practical guidance for anesthesiologists and thoracic surgeons starting a RATS program.Recent FindingsRATS is a new technological approach to execute minimal invasive chest operations. In management of RATS patients, the established ERAS principles for video-assisted thoracoscopic surgery (VATS) apply. In addition, RATS imposes additional conditions on anesthesiologists, nurses, and surgeons alike: The spatial constriction in operation theaters caused by the large robotic equipment longs for a reallocation of the anesthetist’s and surgeon’s working environment that may vary additionally depending on the type of surgery performed in the individual patient. Additionally, the implementation of a positive pressure carbon dioxide gas cavity in the pleura has a direct effect on patient cardio-circulatory and respiratory mechanics that have to be balanced by the anesthesiologist.SummaryRATS advances by replacing open surgery approaches and will complement—but most likely not replace—video-assisted thoracoscopic surgery (VATS). RATS brings new specific intraoperative requirements to the anesthesiological and surgical team members that have to be implemented into clinical routine.
Rhinocerotidae from the early Miocene of the Negev (Israel) and implications for the dispersal of early Neogene rhinoceroses
Authors: Pandolfi Luca , Calvo Ran , Grossman Ari , Rabinovich Rivka 
Published: July 2021

AbstractA revision of the rhinocerotid material from the Negev (Israel), dating back to the early Miocene (MN3 in the European Mammal Biochronology), highlights the presence ofBrachypotheriumand a taxon close toGaindatheriumin the Levantine corridor. A juvenile mandible, investigated using CT scanning, displays morphologically distinct characters consistent withBrachypotheriumcf.B.snowirather than with other Eurasian representatives of this genus. Some postcranial remains from the Negev, such as a humerus, display features that distinguish it among Miocene taxa. We attribute these postcrania to cf.Gaindatheriumsp., a taxon never recorded outside the Siwaliks until now. This taxon dispersed into the Levantine region during the late early Miocene, following a pattern similar to other South Asian taxa.Brachypotheriumcf.B.snowiprobably occurred in the Levantine region and then in North Africa during the early Miocene because its remains are known from slightly younger localities such as Moghara (Egypt) and Jebel Zelten (Libya). The occurrence cf.Gaindatheriumsp. represents a previously unrecorded range expansion out of Southeast Asia. These new records demonstrate the paleogeographic importance of the Levantine region showcasing the complex role of the Levantine corridor in intercontinental dispersals between Asia and Europe as well as Eurasia and Africa.
The external dimension of the EU's fight against transnational crime: Transferring political rationalities of crime control
Authors: Russo Alessandra , Stambøl Eva Magdalena 
Published: July 2021

AbstractThe article constitutes the first comprehensive review of the EU's export of crime control policies and ‘aid to internal security’ across regions over the last 15 years. Drawing on both International Relations and criminology, it develops an analytical framework to identify the political rationalities and technologies of crime control that the EU attempts to transfer across the Eastern and Southern (extended) neighbourhoods. By scrutinising 216 projects aimed at combating transnational crime beyond Europe's borders, spanning law enforcement, border security, criminal justice, and the penitentiary sector, the empirical analysis is geared towards detecting and systematising the ways of thinking and doing crime control that the EU seeks to promote and export. Moreover, it investigates the ‘action at a distance’ whereby it does so. It is argued that in shaping third countries’ ability to criminalise, police, indict, convict, and punish, the EU is simultaneously defining its own security actorness, specifically consolidating its role as a ‘global crime fighter’.
Soil-litter ant (Hymenoptera: Formicidae) community response to reforested lands of Gishwati tropical montane forest, northern-western part of Rwanda
Authors: Nsengimana Venuste , Dekoninck Wouter 
Published: July 2021

AbstractRecently, human activities have impacted biodiversity-rich forest in western Rwanda, creating a need to enhance restoration activities of degraded lands in the region. To evaluate the effects of reforestation activities on the community composition of soil-litter ants, research was conducted in Gishwati tropical montane forest, located in northern-western part of Rwanda. The ant fauna was studied in reforested lands dominated by regenerated native species and exotic tree species. Further, a primary forest made of native trees served as a reference. In each forest type, nine sampling points were used to sample ants. Ant specimens were collected using pitfalls, hand sampling and Winkler extractor. They were identified to subfamilies, genus and species levels using dichotomous keys, and also statistically analysed for species richness, diversity, evenness and community composition. We collected a total of 2,481 individuals from 5 subfamilies, 18 genera and 35 species. Higher abundance, diversity and species richness were found in soil-litter under natural primary and secondary forests dominated by regenerated native plant species compared to exotic tree forest. The ant community composition analysis indicated higher similarities in ant species sampled under primary native forest and secondary forest dominated by regenerated native species. Reforestation by regenerating native species may be given priority in restoration of degraded lands due to their importance in species richness and species diversity.
Atom Probe Tomography of a Cu-Doped TiNiSn Thermoelectric Material: Nanoscale Structure and Optimization of Analysis Conditions
Authors: He Henry , Halpin John E , Popuri Srinivas R , Daly Luke , Bos Jan-Willem G , Moody Michael P , MacLaren Donald A , Bagot Paul AJ 
Published: July 2021

AbstractCu-doping and crystallographic site occupations within the half-Heusler (HH) TiNiSn, a promising thermoelectric material, have been examined by atom probe tomography. In particular, this investigation aims to better understand the influence of atom probe analysis conditions on the measured chemical composition. Under a voltage-pulsing mode, atomic planes are clearly resolved and suggest an arrangement of elements in-line with the expected HH (F-43m space group) crystal structure. The Cu dopant is also distributed uniformly throughout the bulk material. For operation under laser-pulsed modes, the returned composition is highly dependent on the selected laser energy, with high energies resulting in the measurement of excessively high absolute Ti counts at the expense of Sn and in particular Ni. High laser energies also appear to be correlated with the detection of a high fraction of partial hits, indicating nonideal evaporation behavior. The possible mechanisms for these trends are discussed, along with suggestions for optimal analysis conditions for these and similar thermoelectric materials.
Extending Estimating Hydrogen Content in Atom Probe Tomography Experiments Where H2 Molecule Formation Occurs
Authors: Meier Martin S , Jones Megan E , Felfer Peter J , Moody Michael P , Haley Daniel 
Published: July 2021

Abstract
We investigated a new method for estimating specimen hydrogen content in atom probe tomography (APT) in experiments where molecular hydrogen ions () originating from the measurement environment can overlap with deuterium (D+) in the mass-to-charge-state spectrum, thus preventing the direct application of isotopic marking for unambiguous hydrogen analysis. First, we applied an existing method for hydrogen content estimation, using ratios obtained from paired deuterated/nondeuterated experiments. These measurements demonstrated sufficient residual uncertainty to motivate exploring an alternative method to accurately estimate hydrogen content. By varying the time between evaporation events, it is then shown that a highly correlated relationship between field evaporation rate and hydrogen content exists and can also be used to predict hydrogen content. This leads to a new method for measuring hydrogen content within the specimen. We combine this extrapolation technique with continuous cycling of the evaporation rate or pulse frequency during an APT experiment. This could enable spatially resolved imaging of hydrogen concentrations despite the presence of a contaminant background hydrogen signal, without the need for deuteration.
Unmaking of a Customs Union: Regional (Dis)integration in the East African Community
Authors: Rauschendorfer Jakob , Twum Anna 
Published: July 2021

AbstractThe Common External Tariff (CET) of the East African Community (EAC) customs union has long been considered the cornerstone of the most successful example of regional integration in Sub-Saharan Africa. In this paper, we assess the implementation of the EAC-CET using a novel dataset of country- and firm-level deviations from the common tariff regime constructed by digitizing information in gazettes published by the Secretariat of the EAC between 2009 and 2019. Employing these data, we present five patterns on EAC tariff policy: (i) increased usage of country-level deviations from the common tariff regime render the EAC-CET less and less ‘common’; (ii) Kenya, Tanzania, and Uganda predominantly use unilateral deviations to increase external protection while Rwanda mostly decreases tariffs; (iii) Kenya, Tanzania, and Uganda increase tariffs for the same classes of products, but target different industries; (iv) unilateral tariff reductions at the country level are mostly used to facilitate access to inputs; (v) data on firm-level exemptions suggest that private sector development in the EAC would benefit from lower tariffs on intermediate inputs. Our findings demonstrate an incipient but clear trend in the EAC away from a communal tariff regime and towards national and more protectionist trade policies.
Introduction to the special issue on the Centenary of Frank H. Knight's Risk, Uncertainty, and Profit
Authors: Bylund Per L. 
Published: July 2021

AbstractFrank H. Knight's magnum opus Risk, Uncertainty, and Profit, published in 1921, is widely recognized for introducing and establishing the distinction between risk and uncertainty. It is also known for developing a novel theory of the firm and business profit based on entrepreneurial judgment. However, the work's relevance for institutionalism has only rarely been addressed or even acknowledged. This introduction to the special issue organized to celebrate the centenary of Knight's tome briefly summarizes the work's institutionalist implications and the articles that comprise the special issue.
A Three-CenturyJourney:The Lost Manuscript of theHistory of the Incasby Pedro Sarmiento de Gamboa
Authors: Díaz Soledad Carmina González 
Published: July 2021

AbstractTheHistory of the Incasis a chronicle written in Cusco, Peru, at the end of the sixteenth century, by Pedro Sarmiento de Gamboa. It was never published in the colonial period and its only manuscript was lost for three hundred years. At the end of the nineteenth century, the manuscript was found in Göttingen, Prussia. This research note is about a missing manuscript and its unexpected discovery. Moreover, it is about the long and uncharted journey of theHistoryin its multiple lives through Peru, Spain, the Netherlands, and Germany.
Volcanic Vortex Rings: Axial Dynamics, Acoustic Features, and Their Link to Vent Diameter and Supersonic Jet Flow
Authors: Taddeucci J. , Peña Fernández J. J. , Cigala V. , Kueppers U. , Scarlato P. , Del Bello E. , Ricci T. , Sesterhenn J. , Panunzi S. 
Published: July 2021

AbstractBy injecting a mixture of gas and pyroclasts into the atmosphere, explosive volcanic eruptions frequently generate vortex rings, which are toroidal vortices formed by the jet's initial momentum. Here, we report high‐speed imaging and acoustic measurements of vortex rings sourcing from gas‐rich eruptive jets at Stromboli volcano (Italy). Volcanic vortex rings (VVRs) form at the vent together with an initial compression acoustic wave, VVRs maximum rise velocity being directly proportional to the amplitude and inversely proportional to the duration of the compression wave. The axial rise and acoustic signature of VVRs match well those predicted by recent fluid‐dynamic experiments. This good match allows using the high‐frequency (80–1,000 Hz) component of the jet sound and the time‐dependent rise of VVRs to retrieve two key eruption parameters: the Mach number of the eruptive jets (<1.5) and vent diameter (∼0.7 m), respectively, the latter being confirmed independently by direct Uncrewed Aerial Vehicle observations.
Effect of Permeability Evolution in Fault Damage Zones on Earthquake Recurrence
Authors: Yang Zhuo , Yehya Alissar , Iwalewa Tajudeen M. , Rice James R. 
Published: July 2021

AbstractMicro‐crack density, porosity, and permeability in fault damage zones play an important role in the pore fluid diffusion process. During long‐term earthquake cycles, those properties change with time as a result of either physical damage or chemical/physical healing. Hence, the evolution of permeability can affect the recurrence of earthquakes by either delaying or accelerating the weakening of the fault core through controlling the pore pressure distribution and changing the effective normal stress. In this study, we use a single degree of freedom spring slider analog fault model to simulate the earthquake sequences, considering permeability as a decreasing function of the effective normal stress and thus an increasing function of pore pressure; we also examine its evolution resulting from coseismic damage and interseismic healing. Our simulation results show that different permeability evolution, controlled by various physical conditions, could result in a variety of fault slipping histories, which demonstrates the importance of incorporating the permeability evolution into earthquake modeling, especially when assessing the long‐term effects.
Fault Friction During Simulated Seismic Slip Pulses
Authors: Harbord Christopher , Brantut Nicolas , Spagnuolo Elena , Di Toro Giulio 
Published: July 2021

AbstractTheoretical studies predict that during earthquake rupture faults slide at non‐constant slip velocity, however it is not clear which source time functions are compatible with the high velocity rheology of earthquake faults. Here we present results from high velocity friction experiments with non‐constant velocity history, employing a well‐known seismic source solution compatible with earthquake source kinematics. The evolution of friction in experiments shows a strong dependence on the applied slip history, and parameters relevant to the energetics of faulting scale with the impulsiveness of the applied slip function. When comparing constitutive models of strength against our experimental results we demonstrate that the evolution of fault strength is directly controlled by the temperature evolution on and off the fault. Flash heating predicts weakening behavior at short timescales, but at larger timescales strength is better predicted by a viscous creep rheology. We use a steady‐state slip pulse to test the compatibility of our strength measurements at imposed slip rate history with the stress predicted from elastodynamic equilibrium. Whilst some compatibility is observed, the strength evolution indicates that slip acceleration and deceleration might be more rapid than that imposed in our experiments.