cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Growth of Aitken mode ammonium sulfate particles by α-pinene ozonolysis
Creators: name: Krasnomowitz, Justin M.
name: Apsokardu, Michael J.
name: Stangl, Christopher M.
name: Tiszenkel, Lee
name: Ouyang, Qi
name: Shanhu Lee
name: Johnston, Murray V.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology

description: The fraction of Aitken mode particles that grow sufficiently large to act as cloud condensation nuclei is an important factor in understanding the climate impact of atmospheric particles. Elucidating the rate of particle growth in this size range requires a detailed understanding of the mechanisms by which these particles grow. Here, a flow tube reactor is described, characterized and then used to study growth of ammonium sulfate seed particles in the Aitken mode size range by α-pinene ozonolysis under dry conditions (10% RH). When size-selected particles starting at 40, 60, or 80 nm diameter were exposed to α-pinene (11 ppbv) and ozone (five separate mixing ratios between 30 and 250 ppbv), particle growth was found to depend on the amount of α-pinene reacted and the condensation sink, but not directly dependent on the initial seed particle diameter. The observed dependencies are consistent with a condensational growth mechanism, which is not surprising since the dry conditions of the experiment minimized the probability of multiphase chemistry within the seed particles. Combining the measured particle growth with a kinetic model gave a molar yield of 13% for condensable organic molecules produced by the ozonolysis reaction. This value is somewhat higher than previously reported molar yields of highly oxidized molecules (HOMs) measured in the gas phase with chemical ionization mass spectrometry, which are in the 3–7% range. The relationship between molar yields determined from gas phase and particle phase measurements is discussed. Copyright © 2019 American Association for Aerosol Research
Running Coupling in Non-Perturbative QCD - I. Bare Vertices and y-max Approximation
Creators: name: Atkinson, D.
name: Bloch, J. C. R.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A recent claim that in quantum chromodynamics the gluon propagator vanishes in the infrared limit, while the ghost propagator is more singular than a simple pole, is investigated analytically and numerically. This picture is shown to be supported even at the level in which the vertices in the Dyson-Schwinger equations are taken to be bare. The running coupling is shown to be uniquely determined by the equations and to have a large finite infrared limit.
description: Latex, 41 pages, 7 figures, submitted to Phys. Rev. D; corrected typos
Blockchain Electricity Trading Under Demurrage
Creators: name: Cuffe, Paul
name: Devine, Mel T.
Publisher: name: figshare
Year: 2019
Subjects: subject: 91305 Energy Generation, Conversion and Storage Engineering
subject: FOS: Mechanical engineering
subject: 99999 Engineering not elsewhere classified
subject: FOS: Other engineering and technologies

description: Letter in IEEE Transactions on Smart Grid

Abstract:
This letter proposes a novel demurrage mechanism for blockchain electricity marketplaces, whereby the redemptive value of energy-backed tokens declines with time. This mechanism is intended to reward organic price-responsive load shifting by incentivising the consumption of electricity when it is locally abundant. To demonstrate how such a demurrage mechanism might function in practice, this letter describes a mixed complementarity model of a notional token marketplace. These market simulations indicate that, in equilibrium and with rational actors, the demurrage mechanism creates price signals that temporally align the production and consumption of electricity.
HR IN UZBEKISTAN AND THE IMPACT OF KPI ON PERSONAL MOTIVATION
Creators: name: Najimova, Kamola
Publisher: name: Zenodo
Year: 2024

description: HR Management in Uzbekistan refers to the practices, policies, and processes that organizations in the country use to manage their workforce. Like HR management globally, its core functions include recruitment, training and development, performance evaluation, employee relations, compensation, and benefits administration. Key Performance Indicators (KPIs) have become integral to organizational performance management. While they help evaluate success, KPIs can have significant effects on personal motivation. This article delves into how KPIs impact employee motivation, drawing from HR management and social psychology theories. It explores both positive and negative consequences of KPIs and suggests strategies for using KPIs in a way that enhances employee engagement and performance.
$S=-1$ meson-baryon interaction and the role of isospin filtering processes
Creators: name: Feijoo, Albert
name: Magas, Volodymyr
name: Ramos, Angels
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A study of the meson-baryon interaction in the $S=-1$ sector is performed, employing a chiral SU(3) lagrangian up to next-to-leading order (NLO) and implementing unitarization in coupled channels. The model is constrained by a large set of experimental data, paying a especial attention to processes that are sensitive to the NLO contributions, such as the $K^- p\to K^+Ξ^-, K^0Ξ^0$ reactions. The consideration of additional cross sections in single isospin channels, $K^-p\to ηΛ, ηΣ$, has been found to provide more homogeneous and reliable values of the low-energy constants, the stability of which has also been tested by the inclusion of explicit resonant terms. Predictions for new isospin filtering processes, like the $I=1$ $K^0_L p \to K^+ Ξ^0$ reaction that could be measured at the proposed secondary $K^0_L$ beam at Jlab, or the weak decay of the $Λ_b$ into a $J/Ψ$ and different meson-baryon pairs in $I=0$, available at LHCb, are presented. The measurement of such reactions would put valuable constraints on the chiral models describing the $S=-1$ meson-baryon interaction.
description: 18 pages, 10 figures
Additional file 1 of Thorium and fetal neural tube defects: an epidemiological evidence from large case-control study
Creators: name: Wang, Bin
name: Pang, Yiming
name: Zhang, Yali
name: Zhang, Le
name: Ye, Rongwei
name: Yan, Lailai
name: Li, Zhiwen
name: Ren, Aiguo
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Cell Biology
Biotechnology
Environmental Sciences not elsewhere classified
Developmental Biology
Science Policy

description: Additional file 1: Tables S1-S2
A natural $Z^\prime$-portal Majorana dark matter in alternative U(1) extended Standard Model
Creators: name: Okada, Nobuchika
name: Okada, Satomi
name: Raut, Digesh
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider a non-exotic gauged U(1)$_X$ extension of the Standard Model (SM), where the U(1)$_X$ charge of a SM field is given by a linear combination of its hypercharge and Baryon-minus-Lepton ($B-L$) number. All the gauge and mixed gauge-gravitational anomalies are cancelled in this model with the introduction of three right-handed neutrinos (RHNs). Unlike the conventional minimal U(1)$_X$ model, where a universal U(1)$_X$ charge of $-1$ is assigned to three RHNs, we consider an alternative charge assignment, namely, two RHNs ($N_R^{1,2}$) have U(1)$_X$ charge $-4$ while one RHN ($N_R$) has a $+5$ charge. With a minimal extension of the Higgs sector, the three RHNs acquire their Majorana masses associated with U(1)$_X$ symmetry breaking. While $N_R^{1,2}$ have Yukawa coupling with the SM lepton doublets and play an essential role for the 'minimal seesaw' mechanism, $N_R$ is isolated from the SM particles due to its U(1)$_X$ charge and hence it is a natural candidate for the dark matter (DM) without invoking additional symmetries. In this model context, we investigate the $Z^\prime$-portal RHN DM scenario, where the RHN DM communicates with the SM particles through the U(1)$_X$ gauge boson ($Z^\prime$ boson). We identify a narrow parameter space by combining the constraints from the observed DM relic abundance, the results of the search for a $Z^\prime$ boson resonance at the Large Hadron Collider Run-2, and the gauge coupling perturbativity up to the Planck/Grand Unification scale. For a special choice of U(1)$_X$ charges for the SM fields allows us to extend the model to SU(5)$\times$U(1)$_X$ grand unification. In this scenario, the model parameter space is more severely constrained, which will be explored at future high energy collider experiments.
description: 20 pages, 6 figures, version to be published in PRD
Electron conduction within Landau level tails of medium-mobility GaAs / AlGaAs heterostructures
Creators: name: Svoboda, P.
name: Nachtwei, G.
name: Breitlow, C.
name: Heide, S.
name: Cukr, M.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The temperature dependence of both components of the resistivity tensor $\varrho_{xx}(T)$ and $\varrho_{xy}(T)$ has been studied at T $\geq$ 4.2 K within IQHE plateaux around filling factors ν=2 and ν=4 of medium- -mobility GaAs/AlGaAs heterostructures. In the middle of the mobility gap standard activated conductivity has been found with activation energies $Δ$ scaling well with $\hbarω_{c} / 2$ . At filling factors slightly below $ν$=2 another contribution adds to the activated conductivity at T $\leq$ 12 K. This additional contribution can be further enhanced at higher mesuring d.c. currents.We suggest, that it arises due to enhanced electric field assisted tunneling across potential barriers separating localized states within the bulk of the sample.This effect contributes to the backscattering across the sample leading to an enhanced longitudinal conductivity. The additional contribution to $σ_{xx}(T)$ can be reasonably well fitted to the formula for the variable range hopping in strong magnetic fields indicating that the hopping can persist even at temperatures well above 4.2K.
description: 15 pages, LaTeX, 9 postscript figures; accepted for publication in Semiconductor Science & Technology
Stability of characters and filters for weighted semilattices
Creators: name: Choi, Yemon
name: Ghandehari, Mahya
name: Pham, Hung Le
Publisher: name: arXiv
Year: 2019
Subjects: subject: Functional Analysis (math.FA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary 06A12. Secondary 43A22

description: We continue the study of the AMNM property for weighted semilattices that was initiated in [Y. Choi, J. Austral. Math. Soc. 95 (2013), no. 1, 36-67; arXiv 1203.6691]. We reformulate this in terms of stability of filters with respect to a given weight function, and then provide a combinatorial condition which is necessary and sufficient for this "filter stability" property to hold. Examples are given to show that this new condition allows for easier and unified proofs of some results in [Choi, ibid.], and furthermore allows us to verify the AMNM property in situations not covered by the results of that paper. As a final application, we show that for a large class of semilattices, arising naturally as union-closed set systems, one can always construct weights for which the AMNM property fails.
description: AMS-LaTeX, 17 pages. v3: Minor changes following referee's feedback. Accepted by Semigroup Forum
Microstructural Study of Bone Like Apatite Deposited by a Biomimetic Process: Recent Development
Creators: name: Apurba Das
name: Jonmani Rabha
name: Pamu Dobbidi
Publisher: name: Zenodo
Year: 2021
Subjects: Apatite coatings
titanium substrates
microstructural properties
X ray diffraction (XRD)

description: Apatite coatings on Titanium substrates have received widespread attention in the biomedical industry as implant devices for hip replacement and similar surgeries. The microstructural and mechanical properties of apatite films tend to play a very important role in enhancing the osteo-bonding capacities of surgical implants. Implants without such coatings are often dissociated from the host bones due to poor initial bone growth on its surface and stress and strain imbalance-related issues. In this investigation, an effort has been made to study the microstructural properties of the apatite grown on the titanium surfaces by non-destructive X-ray diffraction (XRD), Raman spectra, and FESEM. The analysis revealed that bone-like apatite could be grown successfully over titanium substrates used in the biomedical industry as bone implants. The biomimetic approach helps develop a bone-like apatite layer on the implants which would help in superior osteo-bonding.
Additional file 1 of Quality of opioid prescribing in older adults with or without Alzheimer disease and related dementia
Creators: name: Wei, Yu-Jung Jenny
name: Schmidt, Siegfried
name: Chen, Cheng
name: Fillingim, Roger B.
name: Reid, M. Carrington
name: DeKosky, Steven
name: Solberg, Laurence
name: Pahor, Marco
name: Brumback, Babette
name: Winterstein, Almut G.
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Mental Health

description: Additional file 1: Table S1. ICD-9-CM Codes and Procedures for Disease Conditions and Service Care Considered in the Study. Table S2. Medications of Interest in This Study. Table S3. Current and Recent Guideline and Consensus Documents on Opioid Prescribing for Older Adults with Noncancer pain. Table S4. Characteristics of Community-Dwelling Patients with Chronic Pain With or Without ADRD Using Inverse Propensity Weighting, by Cohort. Table S5. Characteristics of Nursing Home Residents Who Have Chronic Pain With or Without ADRD Using Inverse Propensity Weighting, by Cohort. Figure S1. Flowchart of Included Patients. Figure S2. Absolute Standardized Differences for Baseline Demographic and Clinical Characteristics of Community-Dwelling Patients With Chronic Pain With or Without ADRD in the Original Population and After Inverse Probability Weighting. Figure S3. Absolute Standardized Differences for Baseline Demographic and Clinical Characteristics of Nursing Home Residents Who Had Chronic Pain With or Without ADRD in the Original Population and After Inverse Probability Weighting.
Multiexciton molecules in the hexaborides
Creators: name: Gloor, T. A.
name: Zhitomirsky, M. E.
name: Rice, T. M.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate multiexciton bound states in a semiconducting phase of divalent hexaborides. Due to three degenerate valleys in both the conduction and valence bands the binding energy of a 6-exciton molecule is greatly enhanced by the shell effect. The ground state energies of multiexciton molecules are calculated using the density functional formalism. We also show that charged impurities stabilize multiexciton complexes leading to condensation of localized excitons. These complexes can act as nucleation centers of local moments.
description: RevTEX, 7 pages with 3 figures
Growth of Aitken Mode Ammonium Sulfate Particles by α-Pinene Ozonolysis
Creators: name: Krasnomowitz, Justin M.
name: Apsokardu, Michael J.
name: Stangl, Christopher M.
name: Tiszenekel, Lee
name: Ouyang, Qi
name: Shanhu Lee
name: Johnston, Murray V.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology

description: The fraction of Aitken mode particles that grow sufficiently large to act as cloud condensation nuclei is an important factor in understanding the climate impact of atmospheric particles. Elucidating the rate of particle growth in this size range requires a detailed understanding of the mechanisms by which these particles grow. Here, a flow tube reactor is described, characterized and then used to study growth of ammonium sulfate seed particles in the Aitken mode size range by α-pinene ozonolysis under dry conditions (10% RH). When size-selected particles starting at 40, 60 or 80 nm diameter were exposed to α-pinene (11 ppbv) and ozone (five separate mixing ratios between 30 and 250 ppbv), particle growth was found to depend on the amount of α-pinene reacted and the condensation sink, but not directly dependent on the initial seed particle diameter. The observed dependencies are consistent with a condensational growth mechanism, which is not surprising since the dry conditions of the experiment minimized the probability of multiphase chemistry within the seed particles. Combining the measured particle growth with a kinetic model gave a molar yield of 13% for condensable organic molecules produced by the ozonolysis reaction. This value is somewhat higher than previously reported molar yields of highly oxidized molecules (HOMs) measured in the gas phase with chemical ionization mass spectrometry, which are in the 3-7% range. The relationship between molar yields determined from gas phase and particle phase measurements are discussed.
A utilização de técnicas e dinâmicas de grupo no ensino de técnicas de construção civil
Creators: name: Batista Guimarães Filho, Autimio
name: Cuperschmid, Ana Regina
name: Ferrão, André Munhoz de Argollo
name: Regina Dias Silva Pereira, Tânia
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390305
subject: Professional education and training

description: Este artigo descreve a utilização de técnicas e dinâmicas de grupo no ensino das Disciplinas Tecnologia da Construção Civil I e II, no Curso de Engenharia de Produção Civil da Universidade do Estado da Bahia – UNEB como também no ensino desta disciplina no curso de Engenharia Civil da UNICAMP. No desenvolvimento das disciplinas, duas técnicas e dinâmicas de grupos foram utilizadas quais sejam: a Técnica do Cochicho e a Técnica da Reação. A Técnica do Cochicho foi utilizada para colher informações dos alunos a respeito do andamento da disciplina, favorecendo o planejamento do professor. A Técnica da Reação, além de favorecer a construção do conhecimento, foi utilizada como meio de avaliação do aprendizado. A utilização destas técnicas, além de promover uma maior interação entre alunos/professores e alunos/alunos, motivou os alunos a participarem nas atividades de sala de aula e ainda, favoreceu o aprendizado colaborativo. Assim, sugerimos a utilização de técnicas e dinâmicas de grupos no ensino com o objetivo de levar os alunos a uma maior interação e colaboração na construção do conhecimento coletivo e individual. Neste artigo, descreveremos algumas técnicas de grupos principalmente as Técnicas do Cochicho e Técnica da Reação, possíveis de serem utilizadas tanto no Ensino Presencial, como também, no Ensino à Distância.
ON NON-RIEMANNIAN PARALLEL TRANSPORT IN REGGE CALCULUS
Creators: name: Gronwald, Frank
Publisher: name: arXiv
Year: 1995
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss the possibility of incorporating non-Riemannian parallel transport into Regge calculus. It is shown that every Regge lattice is locally equivalent to a space of constant curvature. Therefore well known-concepts of differential geometry imply the definition of an arbitrary linear affine connection on a Regge lattice.
description: 12 pages, Plain-TEX, two figures (available from the author)
Effective quark model with chiral U(3)XU(3) symmetry for baryon octet and decuplet
Creators: name: Ivanov, A . N.
name: Nagy, M.
name: Troitskaya, N. I.
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We suggest an effective quark model for low-lying baryon octet and decuplet motivated by QCD with a linearly rising confinement potential incorporating the extended Nambu-Jona-Lasinio (ENJL) model with linear realization of chiral U(3)XU(3) symmetry. Baryons are considered as external heavy states coupled to local three-quark currents with fixed spinorial structure and to low-lying mesons through quark-meson interactions defined in the ENJL--model. In the constituent quark loop representation we have calculated the coupling constants of the (pi NN), (pi N Delta) and (gamma N Delta) interactions and the (sigma_{πN})-term. The obtained results are in reasonable agreement with experimental data and other effective field theory approaches.
description: 16 pages, Latex, no figures
Additional file 1 of The impact of lung ultrasound on clinical-decision making across departments: a systematic review
Creators: name: Heldeweg, Micah L. A.
name: Vermue, Lian
name: Kant, Max
name: Brouwer, Michelle
name: Girbes, Armand R. J.
name: Haaksma, Mark E.
name: Heunks, Leo M. A.
name: Mousa, Amne
name: Smit, Jasper M.
name: Smits, Thomas W.
name: Paulus, Frederique
name: Ket, Johannes C. F.
name: Schultz, Marcus J.
name: Tuinman, Pieter Roel
Publisher: name: figshare
Year: 2022
Subjects: Medicine
Cancer
Science Policy

description: Additional file 1. a: First PubMed search 3575. b: Thorax added 944 to PubMed search. c: Embase search. d: Thorax added to Embase search. e: Web of Science search. f: Thorax added to Web of Science search.
OODIDA: On-board/Off-board Distributed Real-Time Data Analytics for Connected Vehicles
Creators: name: Ulm, Gregor
name: Smith, Simon
name: Nilsson, Adrian
name: Gustavsson, Emil
name: Jirstrand, Mats
Publisher: name: arXiv
Year: 2019
Subjects: subject: Programming Languages (cs.PL)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: A fleet of connected vehicles easily produces many gigabytes of data per hour, making centralized (off-board) data processing impractical. In addition, there is the issue of distributing tasks to on-board units in vehicles and processing them efficiently. Our solution to this problem is OODIDA (On-board/Off-board Distributed Data Analytics), which is a platform that tackles both task distribution to connected vehicles as well as concurrent execution of tasks on arbitrary subsets of edge clients. Its message-passing infrastructure has been implemented in Erlang/OTP, while the end points use a language-independent JSON interface. Computations can be carried out in arbitrary programming languages. The message-passing infrastructure of OODIDA is highly scalable, facilitating the execution of large numbers of concurrent tasks.
description: 28 pages, 9 figures, 2 algorithms, 2 code listings, 1 table
Formation of Globular Cluster Systems II: Impact of the Cutoff of the Cluster Initial Mass Function
Creators: name: Choksi, Nick
name: Gnedin, Oleg Y.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Observations of young star clusters reveal that the high-mass end of the cluster initial mass function (CIMF) deviates from a pure power-law and instead truncates exponentially. We investigate the effects of this truncation on the formation of globular cluster (GC) systems by updating our analytic model for cluster formation and evolution, which is based on dark matter halo merger trees coupled to empirical galactic scaling relations, and has been shown in previous work to match a wide array of observational data. The cutoff masses of $M_c=10^{6.5} M_{\odot}$ or $10^{7}M_{\odot}$ match many scaling relations: between the GC system mass and host halo mass, between the average metallicity of the GC system and host halo mass, and the distribution of cluster masses. This range of $M_c$ agrees with indirect measurements from extragalactic GC systems. Models with $M_c<10^{6.5}M_{\odot}$ cannot reproduce the observed GC metallicity and mass distributions in massive galaxies. The slope of the mass-metallicity relation for metal-poor clusters (blue tilt) for all $M_c$ models is consistent with observations within their errors, when measured using the same method. We introduce an alternative, more robust fitting method, which reveals a trend of increasing tilt slope for lower $M_c$. In our model the blue tilt arises because the metal-poor clusters form in relatively low-mass galaxies which lack sufficient cold gas to sample the CIMF at highest masses. Massive blue clusters form in progressively more massive galaxies and inherit their higher metallicity. The metal-rich clusters do not exhibit such a tilt because they form in significantly more massive galaxies, which have enough cold gas to fully sample the CIMF.
description: 14 pages, 11 figures. Updated to match MNRAS accepted version. Minor edits to text and new appendix on the impact of IMF sampling methods
Screening of native tropical trees for phytoremediation in copper-polluted soils
Creators: name: V. Asensio
name: F. G. Flórido
name: F. Ruiz
name: F. Perlatti
name: X. L. Otero
name: T. O. Ferreira
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: Due to the limited number of studies on phytoremediation using native tree species in tropical soils, the aim was to identify new phytoremediator species from tropical climate with the purpose of promoting an increase in the diversity of tropical native trees used in phytoremediation projects. Seven native tree species from Brazil were selected: Cedrela fissilis, Handroanthus serratifolius, Copaifera langsdorffii, Hymenaea courbaril, Mimosa caesalpiniifolia, Cecropia sp. and Myracrodruon urundeuva. Seedlings of these species were planted in pots with an unpolluted Arenosol, and then spiked with 60, 100 and 500 mg kg−1 Cu. Height and stem diameters were measured over 60 days. Biomass and total Cu concentration were determined in leaves, stem and roots. Copper in bulk soils and rhizospheres was analyzed by a sequential extraction method. All species accumulated high concentration of Cu in roots (>300 mg kg−1), so they could be used as phytostabilizators for this metal. Copper mobilization increased in the rhizospheres, but it was mostly absorbed by roots. Cecropia sp., M. urundeuva and C. langsdorffii are hyperaccumulators of Cu (>300 mg kg−1 in shoots), so they are potential phytoextractor species. This study evidence the potential of seven tree species native from tropical regions for phytostabilizing copper-polluted soils.
Polariton Laser in the Bardeen-Cooper-Schrieffer Regime
Creators: name: Hu, Jiaqi
name: Wang, Zhaorong
name: Kim, Seonghoon
name: Deng, Hui
name: Brodbeck, Sebastian
name: Schneider, Christian
name: Höfling, Sven
name: Kwong, Nai H.
name: Binder, Rolf
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Microcavity exciton polariton systems can have a wide range of macroscopic quantum effects that may be turned into better photonic technologies. Polariton Bose-Einstein condensation and photon lasing have been widely accepted in the limits of low and high carrier densities, but identification of the expected Bardeen-Cooper-Schrieffer (BCS) state at intermediate densities remains elusive, as the optical-gain mechanism cannot be directly inferred from existing experiments. Here, using a microcavity with strong polarization selectivity, we gain direct experimental access to the reservoir absorption in the presence of polariton condensation and lasing, which reveals a fermionic gain mechanism underlying the polariton laser. A microscopic many-particle theory shows that this polariton lasing state is consistent with an open-dissipative-pumped system analog of a polaritonic BCS state.
Simple juntas for shifted families
Creators: name: Frankl, Peter
name: Kupavskii, Andrey
Publisher: name: arXiv
Year: 2019
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We say that a family $\mathcal F$ of $k$-element sets is a {\it $j$-junta} if there is a set $J$ of size $j$ such that, for any $F$, its presence in $\mathcal F$ depends on its intersection with $J$ only. Approximating arbitrary families by $j$-juntas with small $j$ is a recent powerful technique in extremal set theory. The weak point of all known junta approximation results is that they work in the range $n>Ck$, where $C$ is an extremely fast growing function of the input parameters, such as the quality of approximation or the number of families we simultaneously approximate. We say that a family $\mathcal F$ is {\it shifted} if for any $F=\{x_1,\ldots, x_k\}\in \mathcal F$ and any $G =\{y_1,\ldots, y_k\}$ such that $y_i\le x_i$, we have $G\in \mathcal F$. For many extremal set theory problems, including the Erd\H os Matching Conjecture, or the Complete $t$-Intersection Theorem, it is sufficient to deal with shifted families only. In this paper, we present very general approximation by juntas results for shifted families with explicit (and essentially linear) dependency on the input parameters. The results are best possible up to some constant factors. Moreover, they give meaningful statements for almost all range of values of $n$. The proofs are shorter than the proofs of the previous approximation by juntas results and are completely self-contained. As an application of our junta approximation, we give a nearly-linear bound for the multi-family version of the Erd\H os Matching Conjecture. More precisely, we prove the following result. Let $n\ge 12sk\log(e^2s)$ and suppose that the families $\mathcal F_1,\ldots, \mathcal F_s\subset {[n]\choose k}$ do not contain $F_1\in\mathcal F_1,\ldots, F_s\in \mathcal F_s$ such that $F_i$'s are pairwise disjoint. Then $\min_{i}|\mathcal F_i|\le {n\choose k}-{n-s+1\choose k}.$
On the violent preheating in the mixed Higgs-$R^2$ inflationary model
Creators: name: He, Minxi
name: Jinno, Ryusuke
name: Kamada, Kohei
name: Park, Seong Chan
name: Starobinsky, Alexei A.
name: Yokoyama, Jun'ichi
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been argued that the mixed Higgs-$R^2$ model acts as the UV extension of the Higgs inflation, pushing up its cut-off scale in the vacuum close up to the Planck scale. In this letter, we study the inflaton oscillation stage after inflation, focusing on the effective mass of the phase direction of the Higgs field, which can cause a violent preheating process. We find that the "spikes" in the effective mass of the phase direction observed in the Higgs inflation still appear in the mixed Higgs-$R^2$ model. While the spikes appear above the cut-off scale in the Higgs-only case, they appear below the cut-off scale when the model is extended with $R^2$ term though reheating cannot be completed in the violent particle production regime since the spikes get milder.
description: 16 pages, 14 figures, typo of a parameter corrected, conclusion remains unchanged
Additional file 1 of Study on the mechanism of efficient extracellular expression of toxic streptomyces phospholipase D in Brevibacillus choshinensis under Mg2+ stress
Creators: name: Chen, Shaofeng
name: Xiong, Weide
name: Zhao, Xurui
name: Luo, Weiyi
name: Yan, Xuhui
name: Lu, Yinghua
name: Chen, Cuixue
name: Ling, Xueping
Publisher: name: figshare
Year: 2022
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Science Policy
subject: 69999 Biological Sciences not elsewhere classified
subject: Marine Biology

description: Additional file 1: Table S1. Ingredients comparison of three mediums. Fig. S1. Effects of three mediums on B. choshinensis /pNCMO2-PLD cell growth (A) and PLD enzyme activity (B). All the medium contained 60 mM MgSO4. Fig. S2. Comparison of cell growth and phospholipase D production using A. different beef extract concentrations; B. different yeast extract concentrations; Biomass (open bar), PLD activity (filled bar). Fig. S3. Identification of reconstructed plasmid pNY326-PLD. Lane M: DNA marker; lanes pNY326-PLD: Sample of recombinant plasmid after Xba I and EcoR I double enzyme digestion. Fig. S4. Identification of reconstructed plasmid pNCMO2-PLD. Lane Marker: DNA marker; lanes 1-6: Sample of recombinant plasmid after Xba I and EcoR I double. Fig. S5. Transformation results of B. choshinensis under different conditions. Transformation of pNY326-PLD in TM with neomycin (A); transformation of pNCMO2-PLD in TM with neomycin (B); transformation of pNCMO2-PLD in TM with neomycin and Mg2+.enzyme digestion. Fig. S6. Identification of B. choshinensis/pNCMO2-PLD. Lane Marker: DNA marker; lanes 1-3: Sample of recombinant plasmid from the recombinant strains after Xba I and EcoR I double enzyme digestion.
Residual Spectrum of Power Bounded Operators
Creators: name: Mello, A.
name: Kubrusly, C. S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A10, 47A35

description: The residual spectrum of a power bounded operator lies in the open unit disk.
Multi-residue analysis of sulfonamide antibiotics in honey samples by on-line solid phase extraction using molecularly imprinted polymers coupled to liquid chromatography-tandem mass spectrometry
Creators: name: Alen-Nils Baeza Fonte
name: Castro, Giselle Rodríguez
name: Liva-Garrido, María
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified

description: This work reports the development of a sensitive and automated online solid phase extraction method using molecularly imprinted polymers (MISPE) coupled to high performance liquid chromatography–tandem mass spectrometry (LC–MS/MS) (HPLC), for the identification and quantification of six sulfonamide antibiotics, namely sulfapiridyne, sulfadoxine, sulfaquinoxaline, sulfacetamide, sulfachloropyridazine and sulfamonomethoxine in honey samples from the Cuban market. The samples were hydrolyzed in acidic media to release the sugar-bound sulfonamides before injection into the preconcentration system. Polymer composition was selected using a combinatorial approach. Several parameters affecting the performance of the MISPE method were optimized to reduce nonspecific binding with the non-imprinted polymer and achieve a selective rebinding of the target antimicrobials. Method validation was performed according to Commission Decision 2002/657/EC in terms of linearity, recoveries, precision, specificity, decision limit (CCα) and detection capability (CCβ). Intraday recoveries at three concentration levels (1, 10 and 20 μg Kg-1) were between 84.3 and 104.7% (RSD < 11.6%) while interday average recoveries were in the ranges 65.5–119.3% (RSDs < 10.4%). The values of CCα and CCβ values were in the ranges 0.1–4.2 and 0.2–4.4 μg kg−1, respectively. The limits of detection and quantitation for the investigated sulfonamides ranged from 0.004–1.050 µg kg−1 and 0.014–3.499 µg kg−1, respectively. The method described has been applied to the analysis of honey samples from Cuban producers.
Axonopus compressus (Sw.) Beauv.: A potential biomonitor for molybdenum in soil pollution
Creators: name: Tow, Shi Wan Tiffany
name: Eng, Zhi Xian
name: Wong, Seok Peng
name: Ge, Liya
name: Swee Ngin Tan
name: Yong, Jean Wan Hong
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Plant Biology
subject: Computational Biology

description: Phytoremediation is an emerging technology that utilizes plants to remediate contaminated environments. In this study, Axonopus compressus (Sw.) Beauv, a fast-growing and hardy groundcover with wide geographical distribution, was exposed to soil Mo treatments ranging from 100 to 1000 mg/kg under tropical greenhouse conditions for five weeks. Generally, Mo accumulation increased as the concentration of Mo in the soil increased. The species was found to accumulate about 4000 mg/kg of Mo without exhibiting severe physiological stress at 600 mg/kg of soil Mo. Maximum accumulation of 6000 mg/kg Mo was observed at the 1000 mg/kg soil Mo treatment, though with severe necrosis and eventual plant mortality. The physiological observations, Mo accumulation behavior, and a bioconcentration factor of about 1 indicated that A. compressus could be a potential biomonitor of Mo.
Sleep-Wake Differences in Scaling Behavior of the Human Heartbeat: Analysis of Terrestrial and Long-Term Space Flight Data
Creators: name: Ivanov, Plamen Ch.
name: Bunde, Armin
name: Amaral, Luís A. N.
name: Havlin, Shlomo
name: Fritsch-Yelle, Janice
name: Baevsky, Roman M.
name: Stanley, H. Eugene
name: Goldberger, Ary L.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantitative Biology (q-bio)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We compare scaling properties of the cardiac dynamics during sleep and wake periods for healthy individuals, cosmonauts during orbital flight, and subjects with severe heart disease. For all three groups, we find a greater degree of anticorrelation in the heartbeat fluctuations during sleep compared to wake periods. The sleep-wake difference in the scaling exponents for the three groups is comparable to the difference between healthy and diseased individuals. The observed scaling differences are not accounted for simply by different levels of activity, but appear related to intrinsic changes in the neuroautonomic control of the heartbeat.
description: 7 pages, 4 figures; to appear in Europhysics Letters, Dec. 99
Relativistic Antihydrogen Production
Creators: name: Meier, Helmar
name: Halabuka, Zlatko
name: Hencken, Kai
name: Trautmann, Dirk
name: Baur, Gerhard
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the production of relativistic antihydrogen atoms by bound-free pair production. The cross section is calculated in the semiclassical approximation (SCA), or equivalently in the plane wave Born approximation (PWBA) using exact Dirac-Coulomb wave functions. We compare our calculations to the equivalent photon approximation (EPA).
description: 6 pages, LaTeX, 7 eps-figures, submitted to Euro. Phys. J. C
Toward greater realism in inclusive fitness models: the case of caste fate conflict in insect societies
Creators: name: Mendes Ferreira, Helena
name: Alves, Denise
name: Cool, Lloyd
name: Oi, Cintia
name: Oliveira, Ricardo
name: Wenseleers, Tom
Publisher: name: Zenodo
Year: 2024
Subjects: Kin selection
Comparative studies
Insects
Melipona
behaviour

description: In the field of social evolution, inclusive fitness theory has been successful in making a wide range of qualitative predictions on expected patterns of cooperation and conflict. Nevertheless, outside of sex ratio theory, inclusive fitness models that make accurate quantitative predictions remain relatively rare. Past models dealing with caste fate conflict in insect societies, for example, successfully predicted that if female larvae can control their own caste fate, an excess should opt to selfishly develop as queens. Available models, however, were unable to accurately predict levels of queen production observed in Melipona bees – a genus of stingless bees where caste is self-determined – as empirically observed levels of queen production are ca. two times lower than the theoretically predicted ones. Here, we show that this discrepancy can be resolved by explicitly deriving the colony-level cost of queen overproduction from a dynamic model of colony growth, requiring incorporation of parameters of colony growth and demography, such as the per-capita rate at which new brood cells are built and provisioned, the percentage of the queen's eggs that are female, costs linked with worker reproduction and worker mortality. Our revised model predicts queen overproduction to more severely impact colony productivity, resulting in an evolutionarily stable strategy (ESS) that is ca. half that of the original model, and is shown to accurately predict actual levels of queen overproduction observed in different Melipona species. Altogether, this shows how inclusive fitness models can provide accurate quantitative predictions, provided that costs and benefits are modelled in sufficient detail and are measured precisely.
description: Funding provided by: Research Foundation - FlandersCrossref Funder Registry ID: https://ror.org/03qtxy027Award Number: G064120N
Funding provided by: Research Foundation - FlandersCrossref Funder Registry ID: https://ror.org/03qtxy027Award Number: G08319N
Funding provided by: Research Foundation - FlandersCrossref Funder Registry ID: https://ror.org/03qtxy027Award Number: G0F6622N
Borel complexity up to the equivalence
Creators: name: Bartoš, Adam
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54H05, 54B20, 54E45, 54F15

description: We say that two classes of topological spaces are equivalent if each member of one class has a homeomorphic copy in the other class and vice versa. Usually when the Borel complexity of a class of metrizable compacta is considered, the class is realized as the subset of the hyperspace $\mathcal{K}([0, 1]^ω)$ containing all homeomorphic copies of members of the given class. We are rather interested in the lowest possible complexity among all equivalent realizations of the given class in the hyperspace. We recall that to every analytic subset of $\mathcal{K}([0, 1]^ω)$ there exist an equivalent $G_δ$ subset. Then we show that up to the equivalence open subsets of the hyperspace $\mathcal{K}([0, 1]^ω)$ correspond to countably many classes of metrizable compacta. Finally we use the structure of open subsets up to equivalence to prove that to every $F_σ$ subset of $\mathcal{K}([0, 1]^ω)$ there exists an equivalent closed subset.
description: 17 pages, 1 figure
On Andrews' integer partitions with even parts below odd parts
Creators: name: Ray, Chiranjit
name: Barman, Rupam
Publisher: name: arXiv
Year: 2018
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Recently, Andrews defined a partition function $\mathcal{EO}(n)$ which counts the number of partitions of $n$ in which every even part is less than each odd part. He also defined a partition function $\overline{\mathcal{EO}}(n)$ which counts the number of partitions of $n$ enumerated by $\mathcal{EO}(n)$ in which only the largest even part appears an odd number of times. Andrews proposed to undertake a more extensive investigation of the properties of $\overline{\mathcal{EO}}(n)$. In this article, we prove infinite families of congruences for $\overline{\mathcal{EO}}(n)$. We next study parity properties of $\overline{\mathcal{EO}}(n)$. We prove that there are infinitely many integers $N$ in every arithmetic progression for which $\overline{\mathcal{EO}}(N)$ is even; and that there are infinitely many integers $M$ in every arithmetic progression for which $\overline{\mathcal{EO}}(M)$ is odd so long as there is at least one. Very recently, Uncu has treated a different subset of the partitions enumerated by $\mathcal{EO}(n)$. We prove that Uncu's partition function is divisible by $2^k$ for almost all $k$. We use arithmetic properties of modular forms and Hecke eigenforms to prove our results.
description: Accepted in Journal of Number Theory
Vortex annihilation in the ordering kinetics of the O(2) model
Creators: name: Mazenko, Gene F.
name: Wickham, Robert A.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The vortex-vortex and vortex-antivortex correlation functions are determined for the two-dimensional O(2) model undergoing phase ordering. We find reasonably good agreement with simulation results for the vortex-vortex correlation function where there is a short-scaled distance depletion zone due to the repulsion of like-signed vortices. The vortex-antivortex correlation function agrees well with simulation results for intermediate and long-scaled distances. At short-scaled distances the simulations show a depletion zone not seen in the theory.
description: 28 pages, REVTeX, submitted to Phys. Rev. E