cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A unifying evolutionary framework for infrared-selected obscured and unobscured quasar host haloes
Creators: name: DiPompeo, Michael
name: Hickox, Ryan
name: Myers, Adam
name: Geach, James
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent measurements of the dark matter halo masses of infrared-selected obscured quasars are in tension --- some indicate that obscured quasars have higher halo mass compared to their unobscured counterparts, while others find no difference. The former result is inconsistent with the simplest models of quasar unification that rely solely on viewing angle, while the latter may support such models. Here, using empirical relationships between dark matter halo and supermassive black hole masses, we provide a simple evolutionary picture that naturally explains these findings and is motivated by more sophisticated merger-driven quasar fueling models. The model tracks the growth rate of haloes, with the black hole growing in spurts of quasar activity in order to "catch-up" with the $M_{\textrm{BH}}$ - $M_{\textrm{star}}$ - $M_{\textrm{halo}}$ relationship. The first part of the quasar phase is obscured and is followed by an unobscured phase. Depending on the luminosity limit of the sample, driven by observational selection effects, a difference in halo masses may or may not be significant. For high luminosity samples, the difference can be large (a few to 10 times higher masses in obscured quasars), while for lower luminosity samples the halo mass difference is very small, much smaller than current observational constraints. Such a simple model provides a qualitative explanation for the higher mass haloes of obscured quasars, as well as rough quantitative agreement with seemingly disparate results.
description: 10 pages, 8 Figures, accepted for publication in MNRAS
MACSUR SciPol Policy Brief 3: Agricultural Greenhouse Gas Emission Trends in Europe: Potential to Carbon Neutral Agriculture
Creators: name: Bandru, Keerthi
name: Helming, Katharina
Publisher: name: Zenodo
Year: 2022
Subjects: agricultural emissions
climate change
emission trends
carbon neutral agriculture
agriculture

description: This policy brief provides an overview of agricultural emissions in 10 countries-Austria, Denmark, France, Germany, Hungary, Ireland, Italy, the Netherlands, Norway, and the UK from 1990 to 2020. The MACSUR SciPol knowledge forum is a pilot exercise initiated by the Joint Programming Initiative for Agriculture, Food Security and Climate Change (FACCE-JPI) to bring science and policy actors together for the strategic design of climate change adaptation and mitigation solutions in the agri-food sector in Europe. This policy brief contributes to this mission by providing evidence-based information to policy for achieving carbon neutrality by 2050, adapting to climate change and understanding synergies and trade-offs in achieving these targets.
Extrapolative forecasting techniques applied to Australian wool prices
Creators: name: Lehmer, Carola.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Closing the Academic Achievement Gap: One Raised Hand at a Time
Creators: name: Poroye, Juliana
Publisher: name: University of Chicago
Year: 2022

description: It is clear that there is an achievement gap between White and Black students’ performance in school, with White students drastically outperforming Black students, on average. This article seeks to identify a factor that contributes to and develop a solution that can help decrease this Black-White achievement gap. This article will consider the argument that Black students lack cultural capital and evaluate the feasibility of the suggestion for them to increase their engagement in middle-class help-seeking behaviors, as a method to help close the achievement gap. By ‘help-seeking behaviors’, this paper specifically refers to students’ actions of raising their hands in class to ask questions to which they do not know the answers or asking their teachers for help with schoolwork. This article will argue that although seeking help can aid Black students in gaining more success in school, American schools currently impede this possibility by not explicitly repudiating the stereotype of Black intellectual inferiority, thereby permitting a hostile environment in which Black students may not feel comfortable engaging in help-seeking. This article recommends that schools teach teachers and students about systemic racism, accurate American history, and social justice as a means to encourage Black students to seek help more frequently. The author of the article interviewed five Black University of Chicago college and graduate students who were instructed in high school classrooms in which their racial group was the minority to test whether racially hostile classroom climates could preclude Black students from seeking help in the classroom.
SOAR observations of the high-viscosity accretion disc of the dwarf nova V4140 Sagitarii in quiescence and in outburst
Creators: name: Baptista, Raymundo
name: Borges, Bernardo W.
name: Oliveira, Alexandre S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the analysis of 22 B-band light curves of the dwarf nova V4140 Sgr obtained with SOI/SOAR during two nights along the decline of a superoutburst in 2006 Sep 12-24 and in quiescence over 50 days following the superoutburst. Three-dimensional eclipse mapping of the outburst light curves indicates that the accretion disc is elliptical (eccentricity e=0.13) and that superhump maximum occurs when the mass donor star is aligned with the bulge of the elliptical disc. The accretion disc is geometrically thin both in outburst and in quiescence; it fills the primary Roche lobe in outburst and shrinks to about half this size in quiescence. The stability of the eclipse shape, width and depth along quiescence and the derived disc surface brightness distribution indicate that the quiescent accretion disc is in a high-viscosity, steady-state. Flickering mapping of the quiescent data reveal that the low-frequency flickering arises from an azimuthally-extended stream-disc impact region at disc rim and from the innermost disc region, whereas the high-frequency flickering originates in the accretion disc. Assuming the disc-related flickering to be caused by fluctuations in the energy dissipation rate induced by magneto-hydrodynamic turbulence (Gertseema & Achterberg 1992), we find that the quiescent disc viscosity parameter is large (alpha ~ 0.2-0.4) at all radii. The high-viscosity quiescent disc and the inferred low disc temperatures in superoutburst are inconsistent with expectations of the disc-instability model, and lead to the conclusion that the outbursts of V4140 Sgr are powered by mass transfer bursts from its donor star.
description: 16 pages, 10 EPS figures, to appear in Monthly Notices of the Royal Astronomical Society
OILA VA IJTIMOIY HIMOYA TIZIMINING O'ZBEKISTONDAGI RIVOJLANISH TENDENSIYALARI
Creators: name: Quramboyev, Alisher
Publisher: name: Zenodo
Year: 2025

description: Ushbu tezisda O‘zbekistonda oila va ijtimoiy himoya tizimi o‘rtasidagi uzviy bog‘liqlik tahlil qilingan. Mustaqillik yillaridan boshlab amalga oshirilayotgan ijtimoiy siyosat va islohotlar, jumladan, “Temir daftar”, “Ijtimoiy himoya yagona reyestri”, “Mahalla bankirlari” instituti va “Ijtimoiy shartnoma” mexanizmlarining ahamiyati yoritilgan. Tezisda, shuningdek, oilani qo‘llab-quvvatlash va aholining kambag‘allikdan chiqarilishida zamonaviy yondashuvlarning roli ko‘rib chiqilgan. Oila va ijtimoiy himoya tizimi orqali jamiyat barqarorligi va iqtisodiy farovonlikka erishish masalasi asosiy e’tiborga olingan.
A challenging view of the 2015 summer V404 Cyg outburst at high energy with INTEGRAL/SPI: The finale
Creators: name: Jourdain, Elisabeth
name: Roques, Jean-Pierre
name: Rodi, James
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: During its strong outburst of 2015 June/July, the X-ray transient V404 Cygni (= GS2023+338) was observed up to a level of 50 Crab in the hard X-ray domain. We focus here on a particularly intense episode preceeding a definitive decline of the source activity. We benefit from large signal-to-noise ratios to investigate the source spectral variability on a timescale of 5 minutes. A Hardness-Intensity study of three broad bands reveals clearly different behaviors at low and high energy (below and above around 100 keV). In particular, on two occasions, the source intensity varies by a factor of 3-4 in amplitude while keeping the same spectral shape. On the other hand, at the end of the major flare, the emission presents a clear anticorrelation between flux and hardness. These behaviors strongly suggest the presence of two spectral components related to emission processes varying in a largely independent way. The first component (E < 100-150 keV) is classically identified with a Comptonizing thermal electron population and requires either an unusual seed photon population or a specific geometry with strong absorbing/reflecting material. The second component is modeled by a cutoff power-law, which could correspond to a second hotter Comptonizing population or another mechanism (synchrotron, non-thermal Comptonization...). In the framework of such a model, Hardness-Intensity and Flux-Flux diagrams clearly demonstrate that the source evolution follows a well organized underlying scheme. They reveal unique information about the Hard X-ray emission processes and connections between them.
description: 10 pages, 6 figures. Accepted for publication in ApJ
Self-Supervised Information Bottleneck for Deep Multi-View Subspace Clustering
Creators: name: Wang, Shiye
name: Li, Changsheng
name: Li, Yanming
name: Yuan, Ye
name: Wang, Guoren
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this paper, we explore the problem of deep multi-view subspace clustering framework from an information-theoretic point of view. We extend the traditional information bottleneck principle to learn common information among different views in a self-supervised manner, and accordingly establish a new framework called Self-supervised Information Bottleneck based Multi-view Subspace Clustering (SIB-MSC). Inheriting the advantages from information bottleneck, SIB-MSC can learn a latent space for each view to capture common information among the latent representations of different views by removing superfluous information from the view itself while retaining sufficient information for the latent representations of other views. Actually, the latent representation of each view provides a kind of self-supervised signal for training the latent representations of other views. Moreover, SIB-MSC attempts to learn the other latent space for each view to capture the view-specific information by introducing mutual information based regularization terms, so as to further improve the performance of multi-view subspace clustering. To the best of our knowledge, this is the first work to explore information bottleneck for multi-view subspace clustering. Extensive experiments on real-world multi-view data demonstrate that our method achieves superior performance over the related state-of-the-art methods.
Factors controlling oxygen migration barriers in perovskites
Creators: name: Mayeshiba, Tam
name: Morgan, Dane
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Perovskites with fast oxygen ion conduction can enable technologies like solid oxide fuel cells. One component of fast oxygen ion conduction is low oxygen migration barrier. Here we apply ab initio methods on over 40 perovskites to produce a database of oxygen migration barriers ranging from 0.2 to 1.6 eV. Mining the database revealed that systems with low barriers also have low metal-oxygen bond strength, as measured by oxygen vacancy formation energy and oxygen p-band center energy. These correlations provide a powerful descriptor for the development of new oxygen ion conductors and may explain the poor stability of some of the best oxygen conducting perovskites under reducing conditions. Other commonly-cited measures of space, volume, or structure ideality showed only weak correlation with migration barrier. The lowest migration barriers (< 0.5 eV) belong to perovskites with non-transition-metal B-site cations, and may require vacancy-creation strategies that involve no dopants or low-association dopants for optimal performance.
description: Final draft and SI in single PDF
Interacting Brownian Motion with Resetting
Creators: name: Falcao, Ricardo
name: Evans, Martin R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study two Brownian particles in dimension $d=1$, diffusing under an interacting resetting mechanism to a fixed position. The particles are subject to a constant drift, which biases the Brownian particles toward each other. We derive the steady-state distributions and study the late time relaxation behavior to the stationary state.
description: 13 pages, 4 figures
Agricultural responsibility versus the commune system in China : an economic analysis of the implications for production
Creators: name: Lim, Steven.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Search for a muonic dark force at BABAR
Creators: name: The BABAR Collaboration
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Many models of physics beyond the Standard Model predict the existence of new Abelian forces with new gauge bosons mediating interactions between "dark sectors" and the Standard Model. We report a search for a dark boson Z' coupling only to the second and third generations of leptons in the reaction e+e- -> mu+mu- Z', Z' -> mu+mu- using 514 fb-1 of data collected by the BABAR experiment. No significant signal is observed for Z' masses in the range 0.212 - 10 GeV. Limits on the coupling parameter g' as low as 7x10^-4 are derived, leading to improvements in the bounds compared to those previously derived from neutrino experiments.
description: 6 pages, 5 figures, submitted to Phys. Rev. D (Rapid Communications)
Canonical analysis for Chern-Simons modification of general relativity
Creators: name: Escalante, Alberto
name: Pantoja-Gonzalez, J. Aldair
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 83-C99

description: By using the Gitman-Lyakhovich-Tyutin canonical analysis for higher-order theories a four-dimensional Chern-Simons modification of general relativity is analyzed. The counting of physical degrees of freedom, the symmetries, and the fundamental Dirac brackets are reported. Additionally, we report the complete structure of the constraints and its Dirac algebra is developed.
Supplementary material for heterogeneous ATP patterns in microvascular networks from Heterogeneous ATP patterns in microvascular networks
Creators: name: Gou, Zhe
name: Zhang, Hengdi
name: Misbah, Chaouqi
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Biophysics
classificationCode: 110601
subject: Biomechanics

description: This file contains supplementary figures and detailed description of some parameters.
Field induced suppression of charge density wave in GdNiC$_2$
Creators: name: Kolincio, Kamil K.
name: Górnicka, Karolina
name: Winiarski, Michał J.
name: Nowak, Judyta Strychalska -
name: Klimczuk, Tomasz
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the specific heat, magnetic, magnetotransport and galvanomagnetic properties of polycrystalline GdNiC$_2$. In the intermediate temperature region above $T_N$ = 20 K, we observe large negative magnetoresistance due to Zeeman splitting of the electronic bands and partial destruction of a charge density wave ground state. Our magnetoresistance and Hall measurements show that at low temperatures a magnetic field induced transformation from antiferromagnetic order to a metamagnetic phase results in the partial suppression of the CDW.
description: Accepted to PRB
Observational Evidence for Large-Scale Gas Heating in a Galaxy Protocluster at z=2.30
Creators: name: Dong, Chenze
name: Lee, Khee-Gan
name: Ata, Metin
name: Horowitz, Benjamin
name: Momose, Rieko
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report a $z=2.30$ galaxy protocluster (COSTCO-I) in the COSMOS field, where the Lyman-$α$ forest as seen in the CLAMATO IGM tomography survey does not show significant absorption. This departs from the transmission-density relationship (often dubbed the fluctuating Gunn-Peterson approximation; FGPA) usually expected to hold at this epoch, which would lead one to predict strong Ly$α$ absorption at the overdensity. For comparison, we generate mock Lyman-$α$ forest maps by applying FGPA to constrained simulations of the COSMOS density field, and create mocks that incorporate the effects of finite sightline sampling, pixel noise, and Wiener filtering. Averaged over $r=15\,h^{-1}\,\mathrm{Mpc}$ around the protocluster, the observed Lyman-$α$ forest is consistently more transparent in the real data than in the mocks, indicating a rejection of the null hypothesis that the gas in COSTCO-I follows FGPA ($p=0.0026$, or $2.79 σ$ significance). It suggests that the large-scale gas associated with COSTCO-I is being heated above the expectations of FGPA, which might be due to either large-scale AGN jet feedback or early gravitational shock heating. COSTCO-I is the first known large-scale region of the IGM that is observed to be transitioning from the optically-thin photoionized regime at Cosmic Noon, to eventually coalesce into an intra-cluster medium (ICM) by $z=0$. Future observations of similar structures will shed light on the growth of the ICM and allow constraints on AGN feedback mechanisms.
description: 12 pages, 5 figures (including one interactive figure at https://member.ipmu.jp/chenze.dong/materials/COSTCO-I/). Accepted by ApJL
Practical Considerations in Direct Detection Under Tukey Signalling
Creators: name: Tasbihi, Amir
name: Kschischang, Frank R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The deliberate introduction of controlled intersymbol interference (ISI) in Tukey signalling enables the recovery of signal amplitude and (in part) signal phase under direct detection, giving rise to significant data rate improvements compared to intensity modulation with direct detection (IMDD). The use of an integrate-and-dump detector makes precise waveform shaping unnecessary, thereby equipping the scheme with a high degree of robustness to nonlinear signal distortions introduced by practical modulators. Signal sequences drawn from star quadrature amplitude modulation (SQAM) formats admit an efficient trellis description that facilitates codebook design and low-complexity near maximum-likelihood sequence detection in the presence of both shot noise and thermal noise. Under the practical (though suboptimal) allocation of a 50% duty cycle between ISI-free and ISI-present signalling segments, at a symbol rate of 50 Gbaud and a launch power of -10 dBm the Tukey scheme has a maximum theoretically achievable throughput of 200 Gb/s with an (8,4)-SQAM constellation, while an IMDD scheme achieves about 145 Gb/s using PAM-8. Note that the two mentioned constellations have the same number of magnitude levels and the difference in throughput is resulting from exploiting phase information under using a complex-valued signal constellation.
description: Submitted to J. Lightwave Techn. on March 3rd, 2022, revised on October 5th, 2022, accepted on December 1st, 2022
Normal thermostability of p.Ser113Leu and p.Arg631Cys variants of mitochondrial Carnitine Palmitoyltransferase II (CPT II) in human muscle homogenate
Creators: name: Joshi, Pushpa Raj
name: Stolberg-Stolberg, Maria
name: Scholle, Leila
name: Meinhardt, Beate
name: Pegoraro, Elena
name: Zierz, Stephan
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 610

description: Previous fibroblast and recombinant enzyme studies showed a markedly thermolabile p.Ser113Leu variant compared to the wild-type (WT) in muscle carnitine palmitoyltransferase II (CPT II) deficiency. Additionally, it has been shown that cardiolipin (CLP) stimulated or inhibited the p.Ser113Leu recombinant variant depending on the pre-incubation temperatures. In this study, the thermolabilities of mitochondrial enzyme CPT II in muscle homogenates of patients with the p.Ser113Leu (n = 3) and p.Arg631Cys (n = 2) variants were identified to be similar to that of WT. Pre-incubation with CLP on ice stimulated the WT enzyme more than both variants. However, CLP stimulated the variants and WT at 46 °C to about 6–18-fold. The present data indicate that the thermostability of CPT II variant in muscle homogenate is similar to that of WT. This is in contrast to the increased thermolability of enzymes derived from fibroblast and that of recombinant enzymes. Hence, it can be speculated that the disruption of the compartmentation in muscle homogenate mediates a protective effect on the thermolability of the native variant. However, the exact mechanism remains unclear. However, the activating effect of CLP on CPT II in muscle homogenate seems to align with those on recombinant enzymes.
Constructing understanding through critical questioning: A comparative study of first year undergraduate and postgraduate writing and communication classes
Creators: name: Sykes, Abdel Halim
name: Azfar, Julian
Publisher: name: Singapore Institute of Technology
Year: 2023
Subjects: English and literacy curriculum and pedagogy (excl. LOTE, ESL and TESOL)

description: This study explored how the forms and depth of critical questions asked by students differ between first year undergraduate students and first year postgraduate students in the Faculty of Engineering. The authors hypothesised that students who were of greater seniority, and would have had more opportunities to encounter, and respond to, higher-order questions were likely to (1) field questions more frequently, and (2) ask higher-order critical questions compared to their peers who are new to university life. To address these hypotheses, a comparative observational study was conducted with one undergraduate class and one postgraduate Engineering class to find evidence of the relationship between learning to think and developing thinking skills required for learning. An adaptation of Bloom’s framework was used to categorise the types of questions raised. The results showed that (1) there was no clear difference between the number of questions asked by the undergraduates and postgraduates, and (2) academic experience appears to be significant in determining the types of questions asked. There was a difference in the types of questions asked by and the level of thinking skills of undergraduates and postgraduates. The former displayed lower-order skills, while the latter displayed higher-order skills.
Discovery of a lineage of soil-dwelling medetera species with multi-coloured eyes in Southern Europe (Diptera: Dolichopodidae)
Creators: name: Pollet, Marc
name: Andrade, Rui Santarém Nunes
name: Gonçalves, Ana
name: Álvarez Fidalgo, Piluca
name: Camaño Portela, José Luis
name: Belinfante, F. J.
name: Mortelmans, Jonas
name: Stark, Andreas
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 590

description: Seven species in the genus Medetera (Diptera: Dolichopodidae) are described here: Medetera aglaops sp. nov., Medetera corsicana sp. nov., Medetera gibbosipyga sp. nov., Medetera hispanica sp. nov., Medetera lusitana sp. nov., Medetera parva sp. nov., and Medetera rectipyga sp. nov. They all originate from the wider Mediterranean region in southwestern Europe (Iberian Peninsula, southern France, Corsica, Sardinia). The most striking feature in most of the species is the bi- or multicolour pattern of the eyes, most conspicuous in Medetera aglaops sp. nov. and Medetera lusitana sp. nov. This character is shared by the male and female sex and is thus not regarded as Male Secondary Sexual Character. All species belong to the Medetera apicalis species group sensu Bickel and are closely related based on shared characters in the hypandrium and cercus. Interestingly, three species with and four species without the basal pair of anterodorsal and posterodorsal bristles on the mid tibia are represented. This suggests that this diagnostic character has less phylogenetic relevance than previously anticipated. Unlike most Palaearctic Medetera, at least five of the new species are mostly found on rocky substrates in dry biotopes with a sclerophyllous vegetation. This further supports their relationship with species of the Medetera muralis subclade sensu Pollet, Germann and Bernasconi.
Efficient algorithms for sequential decision processes
Creators: name: Yeo, C. B.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Variability in GRMHD simulations of Sgr A$^*$: Implications for EHT closure phase observations
Creators: name: Medeiros, Lia
name: Chan, Chi-kwan
name: Özel, Feryal
name: Psaltis, Dimitrios
name: Kim, Junhan
name: Marrone, Daniel
name: Sądowski, Aleksander
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The observable quantities that carry the most information regarding the structures of the images of black holes in the interferometric observations with the Event Horizon Telescope are the closure phases along different baseline triangles. We use long time span, high cadence, GRMHD+radiative transfer models of Sgr A$^*$ to investigate the expected variability of closure phases in such observations. We find that, in general, closure phases along small baseline triangles show little variability, except in the cases when one of the triangle vertices crosses one of a small regions of low visibility amplitude. The closure phase variability increases with the size of the baseline triangle, as larger baselines probe the small-scale structures of the images, which are highly variable. On average, the jet-dominated MAD models show less closure phase variability than the disk-dominated SANE models, even in the large baseline triangles, because the images from the latter are more sensitive to the turbulence in the accretion flow. Our results suggest that image reconstruction techniques need to explicitly take into account the closure phase variability, especially if the quality and quantity of data allow for a detailed characterization of the nature of variability. This also implies that, if image reconstruction techniques that rely on the assumption of a static image are utilized, regions of the $u-v$ space that show a high level of variability will need to be identified and excised.
description: submitted to apj. 12 pages, 12 figures
Does filter-aided sample preparation provide sufficient method linearity for quantitative plant shotgun proteomics?
Creators: name: Leonova, Tatiana
name: Ihling, Christian
name: Saoud, Mohamad
name: Frolova, Nadezhda
name: Rennert, Robert
name: Wessjohann, Ludger
name: Frolov, Andrej
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 610

description: Due to its outstanding throughput and analytical resolution, gel-free LC-based shotgun proteomics represents the gold standard of proteome analysis. Thereby, the efficiency of sample preparation dramatically affects the correctness and reliability of protein quantification. Thus, the steps of protein isolation, solubilization, and proteolysis represent the principal bottleneck of shotgun proteomics. The desired performance of the sample preparation protocols can be achieved by the application of detergents. However, these compounds ultimately compromise reverse-phase chromatographic separation and disrupt electrospray ionization. Filter-aided sample preparation (FASP) represents an elegant approach to overcome these limitations. Although this method is comprehensively validated for cell proteomics, its applicability to plants and compatibility with plant-specific protein isolation protocols remain to be confirmed. Thereby, the most important gap is the absence of the data on the linearity of underlying protein quantification methods for plant matrices. To fill this gap, we address here the potential of FASP in combination with two protein isolation protocols for quantitative analysis of pea (Pisum sativum) seed and Arabidopsis thaliana leaf proteomes by the shotgun approach. For this aim, in comprehensive spiking experiments with bovine serum albumin (BSA), we evaluated the linear dynamic range (LDR) of protein quantification in the presence of plant matrices. Furthermore, we addressed the interference of two different plant matrices in quantitative experiments, accomplished with two alternative sample preparation workflows in comparison to conventional FASP-based digestion of cell lysates, considered here as a reference. The spiking experiments revealed high sensitivities (LODs of up to 4 fmol) for spiked BSA and LDRs of at least 0.6 × 102. Thereby, phenol extraction yielded slightly better recoveries, whereas the detergent-based method showed better linearity. Thus, our results indicate the very good applicability of FASP to quantitative plant proteomics with only limited impact of the protein isolation technique on the method’s overall performance.
Fetal development in anatomical preparations of Ruysch and the Meckels in comparison
Creators: name: Kosenko, Oxana
name: Steinicke, Claudia
name: Kielstein, Heike
name: Steger, Florian
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 610

description: Anatomical collections have been used for centuries for research and teaching purposes. By the example of selected preparations of fetal development from the Ruysch collection (17th–18th centuries) and the Meckel collections (18th–19th century), this article aims to trace the changing purposes, specifics and methods of creating specimens as well as the development of anatomy during that period. The selected specimens are compared and analyzed implementing the historical-critical method. Regarding the appearance of the preparations, we see a transition from the visually aesthetic specimens (Ruysch) to exact ones (Meckel collections). If Ruysch’s preparations were compared in his time to works of art, specimens created by three anatomists of the Meckel dynasty were primarily created for teaching and research purposes. However, Ruysch’s preparations tracing fetal circulation were scientific discoveries of the time. As for preparations of fetal development from the Meckel collections, we see both specimens of physiological processes already known at that time and experimental ones. Regarding teratology, Ruysch and Meckel the Younger tried to explain malformations, but their anatomical preparations could hardly give answers to the cause of deviations from the norm. The differences between the collections can be explained by the different stages of development of anatomy of the time and by the research interests of the anatomists themselves.
Structure, properties, and release kinetics of the Polymer/Insect Repellent System Poly (l-Lactic Acid)/Ethyl Butylacetylaminopropionate (PLLA/IR3535)
Creators: name: Du, Fanfan
name: Erdmann, Rafael
name: Petzoldt, Albrecht
name: Wutzler, André
name: Leuteritz, Andreas
name: Nase, Michael
name: Androsch, René
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 530

description: The insect repellent ethyl butylacetylaminopropionate (IR3535) was used as a functional additive for poly (l-lactic acid) (PLLA) to modify its structure and mechanical properties and achieve insect repellency. PLLA/IR3535 mixtures at various compositions were prepared via melt extrusion. In the analyzed composition range of 0 to 23 m% IR3535, PLLA and IR3535 were miscible at the length scale represented by the glass transition temperature. Addition of IR3535 resulted in a significant decrease in the glass transition temperature of PLLA, as well as in the elastic modulus, indicating its efficiency as a plasticizer. All mixtures were amorphous after extrusion, though PLLA/IR3535 extrudates with an IR3535 content between 18 and 23 m% crystallized during long-term storage at ambient temperature, due to their low glass transition temperature. Quantification of the release of IR3535 into the environment by thermogravimetric analysis at different temperatures between 50 and 100 °C allowed the estimation of the evaporation rate at lower temperatures, suggesting an extremely low release rate with a time constant of the order of magnitude of 1–2 years at body temperature.
Classical and quantum cosmology with two perfect fluids: stiff matter and radiation
Creators: name: Alvarenga, F. G.
name: Fracalossi, R.
name: Freitas, R. C.
name: Gonçalves, S. V. B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work the homogeneous and isotropic Universe of Friedmann-Robertson-Walker is studied in the presence of two fluids: stiff matter and radiation described by the Schutz's formalism. We obtain to the classic case the behaviour of the scale factor of the universe. For the quantum case the wave packets are constructed and the wave function of the universe is found.
description: 17 pages and 21 figures
Genetic association of spikelet abortion with spike, grain, and shoot traits in highly-diverse six-rowed barley
Creators: name: Kamal, Roop
name: Muqaddasi, Quddoos H.
name: Schnurbusch, Thorsten
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 576

description: Spikelet abortion is a phenomenon where apical spikelet primordia on an immature spike abort. Regardless of the row-type, both apical and basal spikelet abortion occurs, and their extent decides the number of grain-bearing spikelets retained on the spike—thus, affecting the yield potential of barley. Reducing spikelet abortion, therefore, represents an opportunity to increase barley yields. Here, we investigated the variation for apical spikelet abortion along with 16 major spike, shoot, and grain traits in a panel of 417 six-rowed spring barleys. Our analyses showed a significantly large genotypic variation resulting in high heritability estimates for all the traits. Spikelet abortion (SA) varies from 13 to 51% depending on the genotype and its geographical origin. Among the seven spike traits, SA was negatively correlated with final spikelet number, spike length and density, while positively with awn length. This positive correlation suggests a plausible role of the rapidly growing awns during the spikelet abortion process, especially after Waddington stage 5. In addition, SA also showed a moderate positive correlation with grain length, grain area and thousand-grain weight. Our hierarchical clustering revealed distinct genetic underpinning of grain traits from the spike and shoot traits. Trait associations showed a geographical bias whereby European accessions displayed higher SA and grain and shoot trait values, whereas the trend was opposite for the Asian accessions. To study the observed phenotypic variation of SA explained by 16 other individual traits, we applied linear, quadratic, and generalized additive regression models (GAM). Our analyses of SA revealed that the GAM generally performed superior in comparison to the other models. The genetic interactions among traits suggest novel breeding targets and easy-to-phenotype “proxy-traits” for high throughput on-field selection for grain yield, especially in early generations of barley breeding programs.
Magnetic, specific heat and electrical transport properties of Frank-Kasper cage compounds RTM$_2$Al$_{20}$ [R = Eu,Gd and La ; TM = V,Ti]
Creators: name: K, Ramesh Kumar
name: Nair, Harikrishnan S.
name: Christian, Reinke
name: A, Thamizhavel
name: Strydom, A. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Single crystals of Frank-Kasper compounds RTM$_2$Al$_{20}$ (R = Eu, Gd and La; TM = V and Ti) were grown by self-flux method and their physical properties were investigated through magnetization ($M$), magnetic susceptibility ($χ$), specific heat ($C_P$) and electrical resistivity ($ρ$) measurements. Powder x-ray diffraction studies and structural analysis showed that these compounds crystallize in the cubic crystal structure with the space group $Fd\overline{3}m$. The magnetic susceptibility for the compounds EuTi$_2$Al$_{20}$ and GdTi$_2$Al$_{20}$ showed a sudden jump below the N{é}el temperature $T_N$ indicative of plausible double magnetic transition. Specific heat ($C_P$) and electrical resistivity ($ρ$) measurements also confirm the first-order magnetic transition (FOMT) and possible double magnetic transitions. Temperature variation of heat capacity showed a sharp phase transition and huge $C_P$ value for the (Eu/Gd)Ti$_2$Al$_{20}$ compounds Full width at half-maximum (FWHM) $
description: 13 figures, 3 Tables
Dual-scale turbulence in filamenting laser beams at high average power
Creators: name: Schubert, Elise
name: de la Cruz, Lorena
name: Mongin, Denis
name: Kasparian, Jérôme
name: Wolf, Jean-Pierre
name: Klingebiel, Sandro
name: Schultze, Marcel
name: Metzger, Thomas
name: Michel, Knut
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the self-induced turbulence of high repetition rate laser filaments over a wide range of average powers (1 mW to 100 W) and its sensitivity to external atmospheric turbulence. Although both externally-imposed and self-generated turbulences can have comparable magnitudes, they act on different temporal and spatial scales. While the former drives the shot-to-shot motion at the millisecond time scale, the latter acts on the 0.5 s scale. As a consequence, their effects are decoupled, preventing beam stabilization by the thermally-induced low-density channel produced by the laser filaments.
description: 11 pages, 5 figures
Analytical solution to the Riemann problem of 1D elastodynamics with general constitutive laws
Creators: name: Berjamin, H
name: Lombard, B
name: Chiavassa, G
name: Favrie, N
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Physics (physics.class-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Under the hypothesis of small deformations, the equations of 1D elastodynamics write as a 2 x 2 hyperbolic system of conservation laws. Here, we study the Riemann problem for convex and nonconvex constitutive laws. In the convex case, the solution can include shock waves or rarefaction waves. In the nonconvex case, compound waves must also be considered. In both convex and nonconvex cases, a new existence criterion for the initial velocity jump is obtained. Also, admissibility regions are determined. Lastly, analytical solutions are completely detailed for various constitutive laws (hyperbola, tanh and polynomial), and reference test cases are proposed.
Report on exposure assessment tools and associated training materials
Creators: name: van Klaveren, Jacob
Publisher: name: Zenodo
Year: 2022
Subjects: TDS
MCRA
methylmercury
nickel
pesticides
consumer app

description: Food may contain hazardous substances such as contaminants or residues from pesticides or food packaging materials. Food risk assessment requires various types of data (e.g., chemical concentrations, food consumption and health hazards). There are already some well-established datasets (e.g., in EFSA collections), but also emerging datasets (e.g., data from total diet studies) which can be very useful for food risk assessment analysis. Tools for food risk assessment which use this data also exist, but these require well-formatted input data. Data harmonization and data conversion are therefore essential steps in the assessment process. In addition, food risk assessment is complex and is constantly evolving, adopting more complex statistical approaches as the discipline develops. Therefore, it is useful to develop demonstrator software to facilitate understanding and guide different identified user groups including risk assessors and low-end-users. Task 4.3 of the FNS-Cloud project aims to create e-services that enable two examples of user communities; low-end users (such as consumers or potential professional users that are not experts for TDS concept or exposure assessment) and researchers/risk assessors, to evaluate and visualize chemical food safety data (considered high-end users). Low-end users will be able to use concentration data from total diet studies (TDS) within the decision-making processes in their daily life, e.g., in the supermarket when purchasing foods. High-end users, e.g., risk assessors and researchers, will be able to use TDS or monitoring data for higher-tier more complex risk assessments. Specifically, the latter approach will use the probabilistic assessment with the Monte Carlo Risk Assessment (MCRA) tool. With the tools and services being developed within FNS-Cloud there are five phases to this work split over WP4 (Use cases) and WP5 (Demonstrators), covering specification, implementation and testing (Task 4.3) and improvement and evaluation (in WP5). For each use case, demonstrator software has been developed. In this report the training materials and user guides of these five demonstrators are outlined. Four demonstrators are using the exposure assessment tool MCRA and one demonstrator is based on a consumer app. The four demonstrators using MCRA are TDS-exposure harmonised, TDS-exposure German children to methylmercury, TDS-exposure Belgian adults to nickel and acute cumulative exposure to pesticides.
Structure, hydrolysis and diffusion of aqueous vanadium ions from Car-Parrinello molecular dynamics
Creators: name: Jiang, Zhen
name: Klyukin, Konstantin
name: Alexandrov, Vitaly
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A molecular level understanding of the properties of electroactive vanadium species in aqueous solution is crucial for enhancing the performance of vanadium redox flow batteries (RFB). Here, we employ Car-Parrinello molecular dynamics (CPMD) simulations based on density functional theory to investigate the hydration structures, first hydrolysis reaction and diffusion of aqueous V$^{2+}$, V$^{3+}$, VO$^{2+}$, and VO$_2^+$ ions at 300 K. The results indicate that the first hydration shell of both V$^{2+}$ and V$^{3+}$ contains six water molecules, while VO$^{2+}$ is coordinated to five and VO$_2^+$ to three water ligands. The first acidity constants (p$K_\mathrm{a}$) estimated using metadynamics simulations are 2.47, 3.06 and 5.38 for aqueous V$^{3+}$, VO$_2^+$ and VO$^{2+}$, respectively, while V$^{2+}$ is predicted to be a fairly weak acid in aqueous solution with a p$K_\mathrm{a}$ value of 6.22. We also show that the presence of chloride ions in the first coordination sphere of the aqueous VO$_2^+$ ion has a significant impact on water hydrolysis leading to a much higher p$K_\mathrm{a}$ value of 4.8. This should result in a lower propensity of aqueous VO$_2^+$ for oxide precipitation reaction in agreement with experimental observations for chloride-based electrolyte solutions. The computed diffusion coefficients of vanadium species in water at room temperature are found to increase as V$^{3+}$ $
Growth and influence of white-rot fungi on the chemical composition of wheat straw inoculated under varying pre-conditions
Creators: name: Martens, Siriwan D.
name: Wildner, Vicki
name: Greef, Jörg Michael
name: Zeyner, Annette
name: Steinhöfel, Olaf
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2022
Subjects: subject: 580

description: Solid-state fermentation with white-rot fungi is an interesting alternative to chemical straw treatment for ruminant nutrition. However, for practical implementation on farms, feasible handling and its effect on nutritional characteristics have to be tested beforehand. Chopped wheat straw was either soaked and drained or just remoistened to about 24% dry matter without subsequent sterilization. Moist straw was inoculated with Pleurotus ostreatus, Ceriporiopsis subvermispora, or Volvariella volvacea. Fermentation lasted up to 42 d with weekly or shorter sampling intervals. Fiber fractions, minerals and elements, and non-starch polysaccharides were analyzed, and microflora was plate counted. Lactic acid bacteria of selected samples were identified by MALDI-TOF. All inoculated fungi grew well under the selected conditions expressed by the visible mycelium and specific smell. P. ostreatus developed fruiting bodies in the given time. Initial numbers of lactic acid bacteria were >8.0 log cfu/g. In the beginning, Weissella confusa/cibaria dominated. However, neither decrease in lignin nor cellulose concentration was observed during the period in either of the treatments, thus seeming to be inappropriate for ruminant nutrition purposes. Some elements and minerals peaked, especially towards the second and third week (Na, Cl, Mg, Fe, and Mn). Growth conditions for mushrooms were optimized by remoistening the straw with a defined amount of water.
An econometric analysis of the industrial demand for energy in Australia
Creators: name: Child, Andrew Warren.
Publisher: name: Monash University
Year: 2022

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