bluuebunny/crossref_metadata_2025_split huggingface dataset:
Supergravity in the Group‐Geometric Framework: A Primer
Authors: Castellani Leonardo 
Published: April 2018

AbstractWe review the group‐geometric approach to supergravity theories, in the perspective of recent developments and applications. Usual diffeomorphisms, gauge symmetries and supersymmetries are unified as superdiffeomorphisms in a supergroup manifold. Integration on supermanifolds is briefly revisited, and used as a tool to provide a bridge between component and superspace actions. As an illustration of the constructive techniques, the cases of off‐shell supergravities and Chern‐Simons supergravity are discussed in detail. A cursory account of supergravity is also included. We recall a covariant canonical formalism, well adapted to theories described by Lagrangians d‐forms, that allows to define a form hamiltonian and to recast constrained hamiltonian systems in a covariant form language. Finally, group geometry and properties of spinors and gamma matrices in dimensions are summarized in Appendices.
Spacetime Supersymmetry in Low‐Dimensional Perturbative Heterotic Compactifications
Authors: Melnikov Ilarion V. , Minasian Ruben , Sethi Savdeep 
Published: April 2018

AbstractWe study the constraints of spacetime supersymmetry for perturbative three– and two–dimensional Minkowski vacua of the critical heterotic string. Assuming a standard RNS construction of the spacetime supersymmetry generators and a compact unitary internal superconformal worldsheet theory, we describe the worldsheet structures associated to various spacetime supersymmetries. In three dimensions we show that there are no CFT surprises: each allowed spacetime supersymmetry is realized by a supergravity compactification. As a recent orbifold construction shows, in two dimensions there are more exotic possibilities, and we discuss how these fit into our analysis.
Nanocellulose Modified Polyethylene Separators for Lithium Metal Batteries
Authors: Pan Ruijun , Xu Xingxing , Sun Rui , Wang Zhaohui , Lindh Jonas , Edström Kristina , Strømme Maria , Nyholm Leif 
Published: April 2018

AbstractPoor cycling stability and safety concerns regarding lithium (Li) metal anodes are two major issues preventing the commercialization of high‐energy density Li metal‐based batteries. Herein, a novel tri‐layer separator design that significantly enhances the cycling stability and safety of Li metal‐based batteries is presented. A thin, thermally stable, flexible, and hydrophilic cellulose nanofiber layer, produced using a straightforward paper‐making process, is directly laminated on each side of a plasma‐treated polyethylene (PE) separator. The 2.5 µm thick, mesoporous (≈20 nm average pore size) cellulose nanofiber layer stabilizes the Li metal anodes by generating a uniform Li+ flux toward the electrode through its homogenous nanochannels, leading to improved cycling stability. As the tri‐layer separator maintains its dimensional stability even at 200 °C when the internal PE layer is melted and blocks the ion transport through the separator, the separator also provides an effective thermal shutdown function. The present nanocellulose‐based tri‐layer separator design thus significantly facilitates the realization of high‐energy density Li metal‐based batteries.
Design of Novel Wearable, Stretchable, and Waterproof Cable‐Type Supercapacitors Based on High‐Performance Nickel Cobalt Sulfide‐Coated Etching‐Annealed Yarn Electrodes
Authors: Chen Yuejiao , Xu Bingang , Wen Jianfeng , Gong Jianliang , Hua Tao , Kan Chi‐Wai , Deng Jiwei 
Published: April 2018

AbstractRapid advances in functional electronics bring tremendous demands on innovation toward effective designs of device structures. Yarn supercapacitors (SCs) show advantages of flexibility, knittability, and small size, and can be integrated into various electronic devices with low cost and high efficiency for energy storage. In this work, functionalized stainless steel yarns are developed to support active materials of positive and negative electrodes, which not only enhance capacitance of both electrodes but can also be designed into stretchable configurations. The as‐made asymmetric yarn SCs show a high energy density of 0.0487 mWh cm−2 (10.19 mWh cm−3) at a power density of 0.553 mW cm−2 (129.1 mW cm−3) and a specific capacitance of 127.2 mF cm−2 under an operating voltage window of 1.7 V. The fabricated SC is then made into a stretchable configuration by a prestraining‐then‐releasing approach using polydimethylsiloxane (PDMS) tube, and its electrochemical performance can be well maintained when stretching up to a high strain of 100%. Moreover, the stretchable cable‐type SCs are stably workable under water‐immersed condition. The method opens up new ways for fabricating flexible, stretchable, and waterproof devices.
The sex change of the caridean shrimp Hippolyte inermis Leach: temporal development of the gonopore morphology
Authors: Mutalipassi Mirko , Maibam Chingoileima , Zupo Valerio 
Published: April 2018

AbstractSex reversal is a process observed in several marine organisms, including some lineages of caridean shrimps. We investigated the gonopore shape and size, to study the sex reversal using Hippolyte inermis as a model. A method was developed which can be applied to identify the sex in juveniles of H. inermis, especially, useful when the standard method of sex assessment is not applicable. The position and the shape of gonopores was recorded under a light macroscope. The sex of mature individuals was then determined by observing the presence/absence of the appendix masculina. In addition, analysis of ontogenetic changes of gonopores were performed to compare their morphology with other species of shrimps whose gonopore morphology was previously known. Female gonopores are located at the far proximo-medial end of the third pair of pereiopod coxae and distally they bear cup-shaped structures, whilst male gonopores are located at the far proximo-medial end of the fifth pair of pereiopod coxae and they have a simpler structure. The shape and structure of gonopores in H. inermis resembled that of other caridean decapods. Intersex individuals were never observed, although this species was demonstrated to be protandric. This observation confirmed previous assumptions indicating that the process of sex reversal is very fast in H. inermis and that it takes place within a single moult. The identification of sex based on the position and shape of gonopores is feasible in this species, and it provides helpful insights for studying sex reversal in small decapods.
Becoming Researchers: Making Academic Kin in the Chthulucene
Authors:   #aaeeer, Verlie Blanche , Emery Sherridan , Osborn Maia , Beasy Kim , Coleman Bianca , Kezabu Kevin , Nicholls Jennifer 
Published: April 2018

AbstractGraduate students are often plagued by stress and anxiety in their journeys of becoming researchers. Concerned by the prevalence of poor graduate student wellbeing in Australia, we share our experiences of kin-making and collaboration within #aaeeer (Australasian Association for Environmental Education Emerging Researchers), a collective of graduate students and early career researchers formed in response to the Australian Association for Environmental Education (AAEE) conference in Hobart, Tasmania, in 2014. In this article, we begin to address the shortage of research into graduate student wellbeing, led by graduate students. Inspired by Donna Haraway's work on making kin in the Chthulucene, we present an exploration that draws together stories from the authors about the positive experiences our kin-making collective enables, and how it has supported our wellbeing and allowed us to work collaboratively. Specifically, we find that #aaeeer offers us a form of refuge from academic stressors, creating spaces for ‘composting together’ through processes of ‘decomposing’ and ‘recomposing’. Our rejection of neoliberal norms has gifted us experiences of joyful collective pleasures. We share our experiences here in the hope of supporting and inspiring other emerging and established researchers to ‘make kin’ and challenge the potentially isolating processes of becoming researchers.
Endoparasitic Paradiplectanotrema klimpeli sp. nov. (Monogenea: Ancyrocephalidae) from the Greater Lizardfish Saurida tumbil (Teleostei: Synodontidae) in Indonesia
Authors: Theisen Stefan , Palm Harry W , Stolz Hendrik , Al-Jufaili Sarah H , Kleinertz Sonja 
Published: April 2018

AbstractA new endoparasitic monogenean of Paradiplectanotrema Gerasev, Gayevskaya &amp; Kovaleva, 1987, Paradiplectanotrema klimpeli sp. nov., is described from the southern Balinese coast, Indonesia. The new species is much larger, wider and characterized by the longest dorsal anchors compared with the congeners. Ventral anchors and ventral bars are the smallest in the genus, with a distinct ratio of 1:1. This is the first species with a gladiator breast-plate-shaped dorsal bar, with a length:width ratio of 1:1. Oesophagi of the Common Grinner Saurida tumbil (Bloch, 1795) (Synodontidae) were infected (prevalence = 17%) at an intensity of 12 (1–21). This is the first record of the genus from the eastern Indian Ocean, and lizardfishes represent a new host family. We provide light microscopy (in situ in oesophagal folds), three-dimensional confocal illustrations and a morphometric comparison of all congeners, with remarks on the recently described first Indonesian endoparasitic Monogenea Pseudempleurosoma haywardi Theisen, Palm, Al-Jufaili &amp; Kleinertz, 2017. First 28S DNA sequences for Paradiplectanotrema allocate the new species close to endoparasitc freshwater monogeneans. Its ecology differs from Pseudempleurosoma Yamaguti, 1965 by utilizing deep-water fishes instead of coastal, coral reef-associated hosts; however, both are infecting schooling, bottom-dwelling fishes.
RETHINKING THE GLOBAL ANTI-MONEY LAUNDERING REGULATIONS TO DETER CORRUPTION
Authors: Kang Sungyong 
Published: April 2018

AbstractWhile ‘global anti-money laundering (AML)’ regulations aim to detect and deter corrupt ‘politically exposed persons (PEPs)’, they have caused tremendous collateral damage to many innocent PEPs, particularly foreign PEPs. Due to the significant compliance costs of identifying and managing accounts of foreign PEPs coupled with an increased risk of serious fines against compliance failures, financial institutions have voluntarily terminated the accounts of foreign PEPs. Global AML regulations could avoid the collateral damage while maximising the deterrence of corruption if high degrees of coordination along two dimensions are satisfied, namely, transborder coordination and coordination between public enforcement entities and private actors. This study illustrates a cornerstone change made in 2012 to fulfil the first dimension and offers policy recommendations to build on this cornerstone by pursuing coordination along the second dimension.
Machiavelli and the Contestable Surface: Zuckert and Strauss
Authors: Duff Alexander S. 
Published: April 2018

AbstractBoth Zuckert and Strauss take the “surface” of Machiavelli's work as the necessary starting point for their interpretations. Zuckert differs from Strauss, however, with respect to what she takes the surface to be. She focuses more attentively on the literary character of the work, as written or literary, and so is led to a different series of observations and emphases in her interpretation of Machiavelli.
On the Coherence ofPlato's Philosophers
Authors: Davis Michael 
Published: April 2018

AbstractBecausePlato's Philosophers:The Coherence of the Dialoguesis such a monumental book, understanding its own coherence is a daunting task. The dialogueTheaetetushas as its theme the problem of knowledge, and so the part ofPlato's Philosophersthat deals with theTheaetetusseems a promising place to begin to think through what Zuckert's book means to be as a whole. In theTheaetetuswe learn how knowledge, as a story that must begin and unfold for us in time, while necessarily partial, provides indirect, if imperfect, access to the whole and leads to a kind of self- knowledge. Plato makes this self-knowledge, the true goal of philosophy, most fully manifest in the drama of the life of his philosopher, Socrates, to whichPlato's Philosophers, in meticulously tracing the dramatic order of the dialogues, means to provide access.
DYING FAST AND DYING SLOW IN BLACK SPACE
Authors: Kwate Naa Oyo A. , Threadcraft Shatema 
Published: April 2018

AbstractAggressive policing strategies have come under scrutiny for stark racial and ethnic inequities. New York City, home to the United States’ largest police force, was subject to a federal class action lawsuit that culminated in its “Stop, Question and Frisk” policies being ruled unconstitutional. In this paper we argue that Stop and Frisk not only violates constitutional rights, but also constitutes a public health problem. Operating as one process in the death world, Stop and Frisk transforms urban space from a resource to a source of danger; induces perceptual dysfunctions that stymie possibilities for Black engagement with the state and make blackness a metonym for crime and disorder; depletes economic and civic resources; and is embodied, by imprinting on the Black body, physically and mentally. Taken together this policing practice induces stress, fear and trauma, marks the Black body as the proper target for erasure by those who would restore the moral order of the polity, and sets Black lives on a trajectory of debility. Stop and Frisk, whatever its intent, is a necropolitical project. Though Achille Mbembe defined necropolitics as the sovereign determination of who lives and dies, we argue that necropolitical projects need not produce a dead body immediately to function. We extend Mbembe’s concept to include diffuse, environmental factors that scale up from individual encounters to Black communities. Though Foucault’s widely cited analysis sees the prison as central in the management and regulation of populations, we hold that Stop and Frisk has more in common with necropower than with biopower, producing dysfunctional bodies awaiting death.
HAMILTON’S DERACIALIZATION
Authors: Johnson Richard 
Published: April 2018

AbstractMany commentators have described Barack Obama as a ‘deracialized’ politician. In contrast to ‘racialized’ Black candidates, deracialized politicians are said to deemphasize their Black racial identity, downplay the racial legacies of American inequality, and favor race-neutral over racially targeted policies. Puzzlingly, this narrative of Obama’s racial politics sits incongruously with his politicalcurriculum vitae, spent largely in contexts which are difficult to describe as deracialized. This article holds that commentators have misjudged Barack Obama’s racial politics by conflating a contingent electoral strategy with a deeper expression of Obama’s racial philosophical commitments. In explaining these commitments, the article finds the deracialized/racialized framing inadequate. Instead, it favors the typology of racial policy alliances situating Obama within the “race-conscious” policy alliance rather than the “color-blind” alliance. By returning to the site of Obama’s political development, Hyde Park in Chicago, the paper uncovers a tradition of racial politics in which Blacks formed coalitions with progressive Whites but also embraced Black racial identity, acknowledged the enduring legacies of slavery and Jim Crow, and supported targeted policies to overturn these racial legacies. The article argues that Obama was an inheritor of this tradition.
Generation Process of Large‐Amplitude Upper‐Band Chorus Emissions Observed by Van Allen Probes
Authors: Kubota Yuko , Omura Yoshiharu , Kletzing Craig , Reeves Geoffrey 
Published: April 2018

AbstractWe analyze large‐amplitude upper‐band chorus emissions measured near the magnetic equator by the Electric and Magnetic Field Instrument Suite and Integrated Science instrument package on board the Van Allen Probes. In setting up the parameters of source electrons exciting the emissions based on theoretical analyses and observational results measured by the Helium Oxygen Proton Electron instrument, we calculate threshold and optimum amplitudes with the nonlinear wave growth theory. We find that the optimum amplitude is larger than the threshold amplitude obtained in the frequency range of the chorus emissions and that the wave amplitudes grow between the threshold and optimum amplitudes. In the frame of the wave growth process, the nonlinear growth rates are much greater than the linear growth rates.
Comparison of Global Martian Plasma Models in the Context of MAVEN Observations
Authors: Egan Hilary , Ma Yingjuan , Dong Chuanfei , Modolo Ronan , Jarvinen Riku , Bougher Stephen , Halekas Jasper , Brain David , Mcfadden James , Connerney John , Mitchell David , Jakosky Bruce 
Published: April 2018

AbstractGlobal models of the interaction of the solar wind with the Martian upper atmosphere have proved to be valuable tools for investigating both the escape to space of the Martian atmosphere and the physical processes controlling this complex interaction. The many models currently in use employ different physical assumptions, but it can be difficult to directly compare the effectiveness of the models since they are rarely run for the same input conditions. Here we present the results of a model comparison activity, where five global models (single‐fluid MHD, multifluid MHD, multifluid electron pressure MHD, and two hybrid models) were run for identical conditions corresponding to a single orbit of observations from the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft. We find that low‐altitude ion densities are very similar across all models and are comparable to MAVEN ion density measurements from periapsis. Plasma boundaries appear generally symmetric in all models and vary only slightly in extent. Despite these similarities there are clear morphological differences in ion behavior in other regions such as the tail and southern hemisphere. These differences are observable in ion escape loss maps and are necessary to understand in order to accurately use models in aiding our understanding of the Martian plasma environment.
Molecular dynamics modeling framework for overcoming nanoshape retention limits of imprint lithography
Authors: Cherala Anshuman , Sreenivasan S. V. 
Published: April 2018

AbstractComplex nanoshaped structures (nanoshape structures here are defined as shapes enabled by sharp corners with radius of curvature <5 nm) have been shown to enable emerging nanoscale applications in energy, electronics, optics, and medicine. This nanoshaped fabrication at high throughput is well beyond the capabilities of advanced optical lithography. While the highest-resolution e-beam processes (Gaussian beam tools with non-chemically amplified resists) can achieve <5 nm resolution, this is only available at very low throughputs. Large-area e-beam processes, needed for photomasks and imprint templates, are limited to ~18 nm half-pitch lines and spaces and ~20 nm half-pitch hole patterns. Using nanoimprint lithography, we have previously demonstrated the ability to fabricate precise diamond-like nanoshapes with ~3 nm radius corners over large areas. An exemplary shaped silicon nanowire ultracapacitor device was fabricated with these nanoshaped structures, wherein the half-pitch was 100 nm. The device significantly exceeded standard nanowire capacitor performance (by 90%) due to relative increase in surface area per unit projected area, enabled by the nanoshape. Going beyond the previous work, in this paper we explore the scaling of these nanoshaped structures to 10 nm half-pitch and below. At these scales a new “shape retention” resolution limit is observed due to polymer relaxation in imprint resists, which cannot be predicted with a linear elastic continuum model. An all-atom molecular dynamics model of the nanoshape structure was developed here to study this shape retention phenomenon and accurately predict the polymer relaxation. The atomistic framework is an essential modeling and design tool to extend the capability of imprint lithography to sub-10 nm nanoshapes. This framework has been used here to propose process refinements that maximize shape retention, and design template assist features (design for nanoshape retention) to achieve targeted nanoshapes.
Epigenetic variability in conversion to psychosis: novel findings from an innovative longitudinal methylomic analysis
Authors: Kebir Oussama , Chaumette Boris , Krebs Marie-Odile 
Published: April 2018

AbstractConversion to psychosis is a longitudinal process during which several epigenetic changes have been described. We tested the hypothesis that epigenetic variability in the methylomes of ultra-high risk (UHR) individuals may contribute to the risk of conversion. We studied a longitudinal cohort of UHR individuals (n = 39) and compared two groups (converters, n = 14 vs. non-converters, n = 25). A longitudinal methylomic study was conducted using Infinium HumanMethylation450 BeadChip covering half a million cytosine–phosphate–guanine (CpG) sites across the human genome from whole-blood samples. We used two statistical methods to investigate the variability of methylation probes. (i) The search for longitudinal variable methylation probes (VMPs) based on median comparisons identified two VMPs in converters only. The first CpG was located in the MACROD2 gene and the second CpG was in an intergenic region at 8q24.21. (ii) The detection of outliers using variance analysis related to private epimutations identified a dozen CpGs in converters only and highlighted two genes (RAC1 and SPHK1) from the sphingolipid signaling pathway. Our study is the first to support increased methylome variability during conversion to psychosis. We speculate that stochastic factors could increase DNA methylation variability and have a role in the complex pathophysiology of conversion to psychosis as well as in other psychiatric diseases.
Experimental search for high-temperature ferroelectric perovskites guided by two-step machine learning
Authors: Balachandran Prasanna V. , Kowalski Benjamin , Sehirlioglu Alp , Lookman Turab 
Published: April 2018

AbstractExperimental search for high-temperature ferroelectric perovskites is a challenging task due to the vast chemical space and lack of predictive guidelines. Here, we demonstrate a two-step machine learning approach to guide experiments in search ofxBi$$[ {{\mathrm{Me}}_y' {\mathrm{Me}}_{(1 - y)}'' } ]$$[Mey′Me(1-y)″]O3–(1 − x)PbTiO3-based perovskites with high ferroelectric Curie temperature. These involve classification learning to screen for compositions in the perovskite structures, and regression coupled to active learning to identify promising perovskites for synthesis and feedback. The problem is challenging because the search space is vast, spanning ~61,500 compositions and only 167 are experimentally studied. Furthermore, not every composition can be synthesized in the perovskite phase. In this work, we predictx,y, Me′, and Me″ such that the resulting compositions have both high Curie temperature and form in the perovskite structure. Outcomes from both successful and failed experiments then iteratively refine the machine learning models via an active learning loop. Our approach finds six perovskites out of ten compositions synthesized, including three previously unexplored {Me′Me″} pairs, with 0.2Bi(Fe0.12Co0.88)O3–0.8PbTiO3showing the highest measured Curie temperature of 898 K among them.