cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum and classical Otto engine for a 2-D material: the case of a graphene quantum dot
Creators: name: Peña, Francisco J.
name: Zambrano, D.
name: Negrete, O.
name: De Chiara, Gabriele
name: Orellana, P. A.
name: Vargas, P.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, we study the performance of classical and quantum magnetic Otto cycles with a working substance composed of a single graphene quantum dot modeled by the continuum approach with the use of the zigzag boundary condition. Modulating an external/perpendicular magnetic field, in the classical approach, we found a constant behavior in the total work extracted that is not present in the quantum formulation. We find that, in the classical approach, the engine yielded a greater performance in terms of total work extracted and efficiency as compared with its quantum counterpart. In the classical case, this is due to the working substance being in thermal equilibrium at each point of the cycle, maximizing the energy extracted in the adiabatic strokes.
Policies Affecting the Food and Agricultural Sector in Peru, 1970-1982: An Evaluation and Recommendations
Creators: name: Orden, David
name: Greene, Duty
name: Roe, Terry
name: Schuh, G. Edward
name: Orden, David
name: Greene, Duty
name: Roe, Terry
name: Schuh, G. Edward
Publisher: name: Unknown
Year: 1982
Subjects: Agricultural and Food Policy
Food Security and Poverty
International Relations/Trade

description: Prepared for the USAID Mission, Lima, Peru. USAID Contract 527-0166-C-00-3001-00 "Agricultural Sector Planning-Peru" October 6, 1982 - December 6, 1982
Atomically Thin CrCl3: An in-Plane Layered Antiferromagnetic Insulator
Creators: name: Cai, Xinghan
name: Song, Tiancheng
name: Wilson, Nathan P.
name: Clark, Genevieve
name: He, Minhao
name: Zhang, Xiaoou
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Yao, Wang
name: Xiao, Di
name: McGuire, Michael A.
name: Cobden, David H.
name: Xu, Xiaodong
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The recent discovery of magnetism in atomically thin layers of van der Waals (vdW) crystals has created new opportunities for exploring magnetic phenomena in the two-dimensional (2D) limit. In most 2D magnets studied to date the c-axis is an easy axis, so that at zero applied field the polarization of each layer is perpendicular to the plane. Here, we demonstrate that atomically thin CrCl3 is a layered antiferromagnetic insulator with an easy-plane normal to the c-axis, that is the polarization is in the plane of each layer and has no preferred direction within it. Ligand field photoluminescence at 870 nm is observed down to the monolayer limit, demonstrating its insulating properties. We investigate the in-plane magnetic order using tunneling magnetoresistance in graphene/CrCl3/graphene tunnel junctions, establishing that the interlayer coupling is antiferromagnetic down to the bilayer. From the temperature dependence of the magnetoresistance we obtain an effective magnetic phase diagram for the bilayer. Our result shows that CrCl3 should be useful for studying the physics of 2D phase transitions and for making new kinds of vdW spintronic devices.
Additional file 2: of CircIBTK inhibits DNA demethylation and activation of AKT signaling pathway via miR-29b in peripheral blood mononuclear cells in systemic lupus erythematosus
Creators: name: Wang, Xin
name: Zhang, Chengzhong
name: Wu, Zhouwei
name: Chen, Yue
name: Shi, Weimin
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Marine Biology
subject: Science Policy

description: Figure S1. a, b Statistical analysis of the cumulative densitometry data for western blot analysis of PTEN expression and AKT phosphorylation in PBMCs from HC transfected with miR-29b mimics. c, d Statistical analysis of the cumulative densitometry data for western blot analysis of PTEN expression and AKT phosphorylation in PBMCs from patients with SLE, transfected with miR-29b inhibitor. e, f Statistical analysis of the cumulative densitometry data for western blot analysis of PTEN/AKT signaling-related proteins in PBMCs from patients with SLE, transfected with miR-29b mimics, circIBTK expression plasmids, NC oligonucleotides or empty vector. g, h Statistical analysis of the cumulative densitometry data for western blot analysis of PTEN/AKT signaling-related proteins in PBMCs from HC transfected with miR-29b inhibitor, circIBTK siRNA or NC oligonucleotides. Three replicate experiments were performed. The cumulative densitometry data were compared using the paired Student’s t test and results were represented as mean ± SD (n = 3). *P < 0.05, **P < 0.01. (PDF 298 kb)
Solar neutrinos: global analysis with day and night spectra from SNO
Creators: name: de Holanda, P. C.
name: Smirnov, A. Yu.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We perform global analysis of the solar neutrino data including the day and night spectra of events at SNO. In the context of two active neutrino mixing, the best fit of the data is provided by the LMA MSW solution with Delta m^2 = 6.15 10^{-5} eV^2, tan^2θ= 0.41, f_B = 1.05, where f_B is the boron neutrino flux in units of the corresponding flux in the Standard Solar Model (SSM). At 3 sigma level we find the following upper bounds: tan^2θ< 0.84 and Delta m^2 < 3.6 10^{-4} eV^2. From 1 sigma-interval we expect the day-night asymmetries of the charged current and electron scattering events to be: A_{DN}^{CC} = 3.9 +3.6-2.9 and A_{DN}^{ES} = 2.1 +2.1-1.4. The only other solution which appears at 3 sigma-level is the VAC solution with Delta m^2 = 4.5 10^{-10} eV^2, tan^2θ= 2.1 and f_B=0.75. The best fit point in the LOW region, with Delta m^2 = 0.93 10^{-7} eV^2 and tan^2θ= 0.64, is accepted at 99.95% (3.5 sigma) C.L. . The least chi^2 point from the SMA solution region, with Delta m^2 = 4.6 10^{-6} eV^2 and tan^2θ= 5 10^{-4}, could be accepted at 5.5 sigma-level only. In the three neutrino context the influence of theta_{13} is studied. We find that with increase of theta_{13} the LMA best fit point shifts to larger Delta m^2, mixing angle is practically unchanged, and the quality of the fit becomes worse. The fits of LOW and SMA slightly improve. Predictions for KamLAND experiment (total rates, spectrum distortion) have been calculated.
description: Typos corrected, reference added
Fermion masses and mixings in the supersymmetric Pati-Salam landscape from Intersecting D6-Branes
Creators: name: Sabir, Mudassar
name: Mansha, Adeel
name: Li, Tianjun
name: Wang, Zhi-Wei
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently, the complete landscape of three-family supersymmetric Pati-Salam models from intersecting D6-branes on a type IIA $\mathbb{T}^6/(\mathbb{Z}_2\times \mathbb{Z}_2)$ orientifold has been enumerated consisting of 33 independent models with distinct gauge coupling relations at the string scale. Here, we study the phenomenology of all such models by providing the detailed particle spectra and the analysis of the possible 3-point and the 4-point Yukawa interactions in order to accommodate all standard-model fermion masses and mixings. We find that only 17 models contain viable Yukawa textures to explain quarks masses, charged-leptons' masses, neutrino-masses, quarks' mixings and leptons' mixings. These viable models split into four classes, viz. a single model with 3 Higgs fields from the bulk and sixteen models with either 6, 9 or 12 Higgs from the $\mathcal{N}=2$ sector. The models perform successively better with the increasing number of Higgs pairs. Remarkably, the class of models with 12 Higgs naturally predicts the Dirac-type neutrino masses in normal ordering consistent with both the experimental constraints as well as the bounds from the swampland program.
description: 95 pages + appendix, 21 figures, published in JHEP
Rhagovelia novana Drake 1953
Creators: name: Moreira, Felipe Ferraz Figueiredo
name: Barbosa, Julianna Freires
name: Ribeiro, José Ricardo Inacio
name: Alecrim, Viviani Pereira
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Veliidae
Rhagovelia
Rhagovelia novana

description: Rhagovelia novana Drake, 1953
Geographical distribution: Brazil, Argentina, and Uruguay.
Distribution in Brazil: Southeast and South regions (SP, RJ, SC, RS) (Drake 1953; Moreira & Ribeiro 2009; Museo Civico di Rovereto 2010).
description: Published as part of Moreira, Felipe Ferraz Figueiredo, Barbosa, Julianna Freires, Ribeiro, José Ricardo Inacio & Alecrim, Viviani Pereira, 2011, Checklist and distribution of semiaquatic and aquatic Heteroptera (Gerromorpha and Nepomorpha) occurring in Brazil 2958, pp. 1-74 in Zootaxa 2958 (1) on page 25, DOI: 10.11646/zootaxa.2958.1.1, http://zenodo.org/record/5281851
Brown dwarfs in the Pleiades cluster : clues to the substellar mass function
Creators: name: Moraux, E.
name: Bouvier, J.
name: Stauffer, J. R.
name: Cuillandre, J-C.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a 6.4 square degrees imaging survey of the Pleiades cluster in the I and Z-bands. The survey extends up to 3 degrees from the cluster center and is 90% complete down to I~22. It covers a mass range from 0.03 Msun to 0.48 Msun and yields 40 brown dwarf candidates (BDCs) of which 29 are new. The spatial distribution of BDCs is fitted by a King profile in order to estimate the cluster substellar core radius. The Pleiades mass function is then derived accross the stellar-substellar boundary and we find that, between 0.03 Msun and 0.48 Msun, it is well represented by a single power-law, dN/dM \propto M^{-alpha}, with an index alpha=0.60 +/- 0.11. Over a larger mass domain, however, from 0.03 Msun to 10 Msun, the mass function is better fitted by a log-normal function. We estimate that brown dwarfs represent about 25% of the cluster population which nevertheless makes up less than 1.5% of the cluster mass. The early dynamical evolution of the cluster appears to have had little effect on its present mass distribution at an age of 120 Myr. Comparison between the Pleiades mass function and the Galactic field mass function suggests that apparent differences may be mostly due to unresolved binary systems.
description: 13 pages, 9 pages, accepted in A&A
The Ising spin glass in a transverse field. Results of two fermionic models
Creators: name: Theumann, A
name: Schmidt, A A
name: Magalhaes, S G
Publisher: name: arXiv
Year: 2001
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We analyze the long range Ising spin glass in a transverse field by using Grassmann variables in a field theory where the spin operators are represented by bilinear combinations of fermionic fields. We compare the results of two fermionic models. In the four state (4S)-model the diagonal Sz operator has two vanishing eigenvalues, that are suppressed by a restraint in the two states (2S)-model. Within a replica symmetric theory and in the static approximation we obtain similar results for both models.
description: 15 pages, 2 figures
Speaking Stata: Spineplots and their kin
Creators: name: Cox, Nicholas J.
name: Cox, Nicholas J.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Research Methods/ Statistical Methods
subject: spineplots
subject: mosaic plots
subject: bar charts
subject: graphics
subject: categorical data

description: The term spineplot has been applied over the last decade or so to a type of bar chart used particularly for showing frequencies, proportions, or percentages of two cross-classified categorical variables. The principle is that the areas of rectangular tiles are proportional to the frequencies in the cells of a contingency table. Often both coarse and fine structure are easy to see, including departures from independence. The main idea has, in fact, been rediscovered repeatedly over at least the last 130 years. In its most general form, it has been widely publicized under the name mosaic plots. This column introduces, discusses, and exemplifies a Stata implementation of spineplots. It is noted that a restriction to two variables is more apparent than real, as either axis of a spineplot can show a composite variable defined by cross combinations of two or more variables.
Gradient flow step-scaling function for SU(3) with twelve flavors
Creators: name: Hasenfratz, Anna
name: Rebbi, Claudio
name: Witzel, Oliver
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We calculate the step scaling function, the lattice analog of the renormalization group $β$-function, for an SU(3) gauge theory with twelve flavors. The gauge coupling of this system runs very slowly, which is reflected in a small step scaling function, making numerical simulations particularly challenging. We present a detailed analysis including the study of systematic effects of our extensive data set generated with twelve dynamical flavors using the Symanzik gauge action and three times stout smeared Möbius domain wall fermions. Using up to $32^4$ volumes, we calculate renormalized couplings for different gradient flow schemes and determine the step-scaling $β$ function for a scale change $s=2$ on up to five different lattice volume pairs. Our preferred analysis is fully $O(a^2)$ Symanzik improved and uses Zeuthen flow combined with the Symanzik operator. We find an infrared fixed point within the range $5.2 \le g_c^2 \le 6.4$ in the $c=0.250$ finite volume gradient flow scheme. We account for systematic effects by calculating the step-scaling function based on alternative flows (Wilson or Symanzik) as well as operators (Wilson plaquette, clover) and also explore the effects of the perturbative tree-level improvement.
description: 22 pages, 14 figures, 5 tables; v2 version published in Phys.Rev.D
Precise Pick-and-Place using Score-Based Diffusion Networks
Creators: name: Guo, Shih-Wei
name: Hsiao, Tsu-Ching
name: Liu, Yu-Lun
name: Lee, Chun-Yi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this paper, we propose a novel coarse-to-fine continuous pose diffusion method to enhance the precision of pick-and-place operations within robotic manipulation tasks. Leveraging the capabilities of diffusion networks, we facilitate the accurate perception of object poses. This accurate perception enhances both pick-and-place success rates and overall manipulation precision. Our methodology utilizes a top-down RGB image projected from an RGB-D camera and adopts a coarse-to-fine architecture. This architecture enables efficient learning of coarse and fine models. A distinguishing feature of our approach is its focus on continuous pose estimation, which enables more precise object manipulation, particularly concerning rotational angles. In addition, we employ pose and color augmentation techniques to enable effective training with limited data. Through extensive experiments in simulated and real-world scenarios, as well as an ablation study, we comprehensively evaluate our proposed methodology. Taken together, the findings validate its effectiveness in achieving high-precision pick-and-place tasks.
description: 8 pages, 7 figures. Project webpage: https://tony2guo.github.io/precise-pick-and-place/
MOESM2 of Association of medication non-adherence with short-term allograft loss after the treatment of severe acute kidney transplant rejection
Creators: name: Al-Sheyyab, Ahmed
name: Binari, Laura
name: Shwetar, Mohammed
name: Everly Ramos
name: Kapp, Meghan
name: Bala, Stefanie
name: Wilson, Nikita
name: Forbes, Rachel
name: J. Helderman
name: Abdel-Kader, Khaled
name: Concepcion, Beatrice
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Marine Biology
subject: Hematology
subject: Computational Biology

description: Additional file 2: Table S2. Modified Poisson Regression with Robust Variance Analysis for All-Cause Graft Loss by 6â Months.
Digital Maps: "Geographic and Temporal Access to Basic Banking Services Offered through Post Office in Wales"
Creators: name: Sonea, Andra
name: Westerholt, René
Publisher: name: Zenodo
Year: 2021
Subjects: Spatial Analysis
Isochrones
Access to Banking
Post Office
Wales

description: The interactive maps included support the paper "Geographic and Temporal Access to Basic Banking Services Offered through Post Office in Wales" by Andra Sonea and René Westerholt. Applied Spatial Analysis and Policy (2021). The naming convention of the files indicates: - the type of isochrone: distance or time - the way of moving: walking (foot) or driving (car) - the post offices included: all or only those with a capacity over 0.75 (open more than 23h/week) The post office locations and opening hours have been web-scraped in July 2019 using the code in the Jupyter Notebook attached ("PO_Location_Extraction.ipynb") The isochrones were calculated using the API from OpenRouteService: https://openrouteservice.org/dev/#/api-docs/v2/isochrones
Exploring the relation between transonic dislocation glide and stacking fault width in FCC metals
Creators: name: Jones, Kathryn R.
name: Dang, Khanh
name: Blaschke, Daniel N.
name: Fensin, Saryu J.
name: Hunter, Abigail
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Theory predicts limiting gliding velocities that dislocations cannot overcome. Computational and recent experiments have shown that these limiting velocities are soft barriers and dislocations can reach transonic speeds in high rate plastic deformation scenarios. In this paper we systematically examine the mobility of edge and screw dislocations in several face centered cubic (FCC) metals (Al, Au, Pt, and Ni) in the extreme large-applied-stress regime using MD simulations. Our results show that edge dislocations are more likely to move at transonic velocities due to their high mobility and lower limiting velocity than screw dislocations. Importantly, among the considered FCC metals, the dislocation core structure determines the dislocation's ability to reach transonic velocities. This is likely due to the variation in stacking fault width (SFW) due to relativistic effects near the limiting velocities.
description: 14 pages, 6 figures; revised version
SynthSOD: Developing an Heterogeneous Dataset for Orchestra Music Source Separation
Creators: name: Garcia-Martinez, Jaime
name: Diaz-Guerra, David
name: Politis, Archontis
name: Virtanen, Tuomas
name: Carabias-Orti, Julio J.
name: Vera-Candeas, Pedro
Publisher: name: arXiv
Year: 2024
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Recent advancements in music source separation have significantly progressed, particularly in isolating vocals, drums, and bass elements from mixed tracks. These developments owe much to the creation and use of large-scale, multitrack datasets dedicated to these specific components. However, the challenge of extracting similarly sounding sources from orchestra recordings has not been extensively explored, largely due to a scarcity of comprehensive and clean (i.e bleed-free) multitrack datasets. In this paper, we introduce a novel multitrack dataset called SynthSOD, developed using a set of simulation techniques to create a realistic (i.e. using high-quality soundfonts), musically motivated, and heterogeneous training set comprising different dynamics, natural tempo changes, styles, and conditions. Moreover, we demonstrate the application of a widely used baseline music separation model trained on our synthesized dataset w.r.t to the well-known EnsembleSet, and evaluate its performance under both synthetic and real-world conditions.
description: The SynthSOD dataset can be downloaded from https://doi.org/10.5281/zenodo.13759492
Nanotube diameter optimal for channeling of high-energy particle beam
Creators: name: Biryukov, V. M.
name: Bellucci, S.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Channeling of particle beam in straight and bent single-wall nanotubes has been studied in computer simulations. We have found that the nanotubes should be sufficiently narrow in order to steer efficiently the particle beams, with preferred diameter in the order of 0.5-2 nm. Wider nanotubes, e.g. 10-50 nm, appear rather useless for channeling purpose because of high sensitivity of channeling to nanotube curvature. We have compared bent nanotubes with bent crystals as elements of beam steering technique, and found that narrow nanotubes have an efficiency of beam bending similar to that of crystals.
description: 13 pages, 4 figures; Latex source added
Progress and future prospects in biochar composites: Application and reflection in the soil environment
Creators: name: Mandal, Sandip
name: Pu, Shengyan
name: Adhikari, Sangeeta
name: Ma, Hui
name: Kim, Do-Heyoung
name: Bai, Yingchen
name: Hou, Deyi
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences

description: In recent years, environmental pollution is a major global concern and adversely affecting human health and the economy. The environmental properties of soil are exceptionally complex, which makes the remediation and treatment more challenging and expensive. In this aspect, sustainable materials (biomaterials, biochar, and composites) present an effective and efficient remediation solution. Exactly, biochar and its relative composites can achieve novel properties with addition of metal oxides, surface agents, and nano-material. The present review study provides quantitative analysis and addresses the advantages of using biochar composites relative with pure biochar. The synthesis of Nano-metal assisted biochar, properties and utilization in improving soil properties as well as heavy metal removal are reviewed. Specific attention has been paid to the impacts of biochar and its composite on soil fundamental properties such as pH, cation exchange efficiency, bulk density, porosity, water retention capability, soil organic matter (SOM) and redox reactions. Significant emphasis is focused on soil remediation, in particular, the elimination of heavy metals utilizing biochar-based composites. Further research is urged to verify the proposed mechanisms involved biochar composites-microbial interactions and heavy metal remediation considering short term and long term efficiency for improvement. HighlightsProgress in development, synthesis methods, and application of biochar-based composites in the soil are studied.The impact mechanisms of biochar composites on essential soil properties have been studied.Biochar-based composites have a significant effect on bulk density and water retention capacity.Biochar-based composites were found to be better than pristine biochar in soil heavy metal remediation.The potential use of biochar-based composites in different soil heavy metal remediation prospected. Progress in development, synthesis methods, and application of biochar-based composites in the soil are studied. The impact mechanisms of biochar composites on essential soil properties have been studied. Biochar-based composites have a significant effect on bulk density and water retention capacity. Biochar-based composites were found to be better than pristine biochar in soil heavy metal remediation. The potential use of biochar-based composites in different soil heavy metal remediation prospected.
Cosmological Dependence of Non-resonantly Produced Sterile Neutrinos
Creators: name: Gelmini, Graciela B.
name: Lu, Philip
name: Takhistov, Volodymyr
Publisher: name: arXiv
Year: 2019
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 discuss how a laboratory detection of a sterile neutrino not only would constitute a fundamental discovery of a new particle, but could also provide an indication of the evolution of the Universe before Big-Bang Nucleosynthesis (BBN), a fundamental discovery in cosmology. These "visible" sterile neutrinos could be detected in experiments such as KATRIN/TRISTAN and HUNTER in the keV mass range and PTOLEMY, KATRIN and reactor neutrino experiments in the eV mass range. Standard assumptions are usually made to compute the relic abundance and momentum distribution of particles produced before the temperature of the Universe was 5 MeV, an epoch from which there are no observed remnants thus far. However, non-standard pre-BBN cosmologies based on other assumptions that are equally in agreement with all existing data can arise in some theoretical models. We revisit the production of 0.01 eV to 1 MeV sterile neutrinos via non-resonant active-sterile flavor oscillations in several pre-BBN cosmologies. We give general equations for models in which the expansion of the Universe is parametrized by its amplitude and temperature power and where entropy is conserved, which include kination and scalar tensor models as special cases.
description: 42 pages, 4 figures; v2: published version
Instanton method for the electron propagator
Creators: name: Geller, Michael R.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A nonperturbative theory of the electron propagator is developed and used to calculate the one-particle Green's function and tunneling density-of-states in strongly correlated electron systems. The method, which is based on a Hubbard-Stratonovich decoupling of the electron-electron interaction combined with a cumulant expansion of the resulting noninteracting propagator, provides a possible generalization of the instanton technique to the calculation of the electron propagator in a many-body system. Application to the one-dimensional electron gas with short-range interaction is discussed.
description: EP2DS conference proceeding
MOESM1 of Association of medication non-adherence with short-term allograft loss after the treatment of severe acute kidney transplant rejection
Creators: name: Al-Sheyyab, Ahmed
name: Binari, Laura
name: Shwetar, Mohammed
name: Everly Ramos
name: Kapp, Meghan
name: Bala, Stefanie
name: Wilson, Nikita
name: Forbes, Rachel
name: J. Helderman
name: Abdel-Kader, Khaled
name: Concepcion, Beatrice
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Marine Biology
subject: Hematology

description: Additional file 1: Table S1. Cox Proportional Hazards Model for All-Cause Graft Loss.
Rhagovelia occulcata Drake 1959
Creators: name: Moreira, Felipe Ferraz Figueiredo
name: Barbosa, Julianna Freires
name: Ribeiro, José Ricardo Inacio
name: Alecrim, Viviani Pereira
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Veliidae
Rhagovelia
Rhagovelia occulcata

description: Rhagovelia occulcata Drake, 1959
Geographical distribution: Brazil.
Distribution in Brazil: Southeast and South regions (SP, PR) (Drake 1959; Nieser & Melo 1997).
description: Published as part of Moreira, Felipe Ferraz Figueiredo, Barbosa, Julianna Freires, Ribeiro, José Ricardo Inacio & Alecrim, Viviani Pereira, 2011, Checklist and distribution of semiaquatic and aquatic Heteroptera (Gerromorpha and Nepomorpha) occurring in Brazil 2958, pp. 1-74 in Zootaxa 2958 (1) on page 25, DOI: 10.11646/zootaxa.2958.1.1, http://zenodo.org/record/5281851
Investigating the CREDIT history of supernova remnants as cosmic-ray sources
Creators: name: Stall, Anton
name: Loo, Chun Khai
name: Mertsch, Philipp
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Supernova remnants (SNRs) have long been suspected to be the primary sources of Galactic cosmic rays. Over the past decades, great strides have been made in the modelling of particle acceleration, magnetic field amplification, and escape from SNRs. Yet, while many SNRs have been observed in non-thermal emission in radio, X-rays, and gamma-rays, there is no evidence for any individual object contributing to the locally observed flux. Here, we propose a particular spectral signature from individual remnants that is due to the energy-dependent escape from SNRs. For young and nearby sources, we predict fluxes enhanced by tens of percent in narrow rigidity intervals; given the percent-level flux uncertainties of contemporary cosmic-ray data, such features should be readily detectable. We model the spatial and temporal distribution of sources and the resulting distribution of fluxes with a Monte Carlo approach. The decision tree that we have trained on simulated data is able to discriminate with very high significance between the null hypothesis of a smooth distribution of sources and the scenario with a stochastic distribution of individual sources. We suggest that this cosmic-ray energy-dependent injection time (CREDIT) scenario be considered in experimental searches to identify individual SNRs as cosmic-ray sources.
description: 8 pages, 3 figures, 1 table
Serbian Agriculture in Regional and European Integration
Creators: name: Zekic, Stanislav
name: Gajic, Milivoj
name: Matkovski, Bojan
name: Zekic, Stanislav
name: Gajic, Milivoj
name: Matkovski, Bojan
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: International Relations/Trade
subject: Agriculture
subject: Agricultural policy
subject: Development performances
subject: Export
subject: Integrations.

description: Agriculture is a relatively important economic activity in Serbia. In addition, the importance of agriculture stems from the upcoming full implementation of the Interim Trade Agreement with the EU, and the expected beginning of the negotiation process for full membership in the organization. In this context, the starting point of the analysis is the consideration of the agricultural resource potential as a prerequisite for the elaboration of its production performance. The analysis of export performances of agribusiness, together with the production performance of agriculture provides an accurate insight into the degree of competitiveness of Serbian agribusiness. The comparative approach to the problem provides the position identification of agriculture in Serbia, compared both with the region and the EU. This also considers the development perspective and determination of the role of agriculture in the integration of Serbian economy in regional and European frameworks. The empirical analysis represents the basis for the formulation of future steps in the creation of agricultural policy measures and appropriate strategies in the pre-accession negotiations with the EU. Above all, these measures should improve the competitiveness of agriculture, which, combined with the provision of food security and food safety and adequate incomes of farmers, has to be the imperative during the negotiation process with the EU in the field of agriculture.
Implications of observed neutrinoless double beta decay
Creators: name: Klapdor-Kleingrothaus, H. V.
name: Sarkar, U.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recently a positive indication of the neutrinoless double beta decay has been announced. We study the implications of this result taking into consideration earlier results on atmospheric neutrinos and solar neutrinos. We also include in our discussions the recent results from SNO and K2K. We point out that on the confidence level given for the double beta signal, the neutrino mass matrices are now highly constrained. All models predicting Dirac masses are ruled out and leptogenesis becomes a natural choice. Only the degenerate and the inverted hierarchical solutions are allowed for the three generation Majorana neutrinos. In both these cases we find that the radiative corrections destabilize the solutions and the LOW, VO and Just So solutions of the solar neutrinos are ruled out. For the four generation case only the inverted hierarchical scenario is allowed.
description: 16 pages, 2 postscript figures
Dense gas clouds and the Unidentified EGRET sources
Creators: name: Walker, Mark
name: Mori, Masaki
name: Ohishi, Michiko
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Cold, dense gas clouds have been proposed as a major component of the Galactic dark matter; such clouds can be revealed by the gamma-ray emission which arises from cosmic-rays interacting with the gas. If this dark matter component is clustered then highly luminous GeV sources result, preferentially at low to mid Galactic latitudes where they lie within the cosmic-ray disk. The predicted emission for such clusters is steady, continuum emission with peak power emerging at several hundred MeV. These sources would not have obvious counterparts at other wavelengths and are thus of interest in connection with the UnIDentified (UID) EGRET sources. Here we present a Monte Carlo simulation of the gamma-ray source population due to cold gas clouds, assuming a Cold-Dark-Matter-like mass spectrum for the clustering. We find that ~280 EGRET sources are predicted by this model, with a median Galactic latitude of 12 degrees for the population, and a median angular size of 2.2 degrees. The latitude and size distributions are consistent with the UID EGRET source data, but the source counts are clearly overpredicted. On the basis of these results we propose that clusters of cold gas clouds comprise the majority population of the observed UID EGRET sources. Our interpretation implies that there should be microwave counterparts to most of the UID sources, and will thus be strongly constrained by data from the present generation of microwave anisotropy experiments.
description: 12 pages, 5 figures, version accepted by ApJ, includes cosmic-ray electron contribution to emissivity
Anomalous behavior of Replicator dynamics for the Prisoner's Dilemma on diluted lattices
Creators: name: Leivas, Fernanda R.
name: Fernandes, Heitor C. M.
name: Vainstein, Mendeli H.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: In diluted lattices, cooperation is often enhanced at specific densities, particularly near the percolation threshold for stochastic updating rules. However, the Replicator rule, despite being probabilistic, does not follow this trend. We find that this anomalous behavior is caused by structures formed by holes and defectors, which prevent some agents from experiencing fluctuations, thereby restricting the free flow of information across the network. As a result, the system becomes trapped in a frozen state, though this can be disrupted by introducing perturbations. Finally, we provide a more quantitative analysis of the relationship between the percolation threshold and cooperation, tracking its development within clusters of varying sizes and demonstrating how the percolation threshold shapes the fundamental structures of the lattice.
An Economic Analysis of Small Farm Mechanization in Western Province, Kenya
Creators: name: Oluoch-Kosura, Willis
name: Oluoch-Kosura, Willis
Publisher: name: Unknown
Year: 1983
Subjects: Farm Management

description: This study evaluated alternative methods of land preparation for maize production on small farms in Western Province, Kenya. Human, oxen and tractors were the three sources of power. The crop production is dependent on rainfall, and timeliness of operations is critical. To ensure optimum yields 1 farmers in this area need to ready the available acreage for maize planting soon after the rains begin. An effective method of land preparation to improve labour productivity is desirable. Data were obtained from the Integrated Agricultural Development Program (IADP) records for 1977 and 1981 for Western Province, together with an additional sample of 40 farmers selected in 1981 from the same province. Based on the level of mechanization in land preparation, farms were categorized into those using: 1. the hoe, 2. owned oxen, 3. hired oxen, and 4. hired government or private tractor. Typical labour utilization profiles indicated that those not using the hoe for land preparation used fewer mandays of labour for that task but subsequently employed more labour to perform all the other necessary operations on the readied land. The proportion using owned oxen for ploughing increased from 25% in 1977 to 43% in 1981. Drudgery involved in hoeing was a factor facilitating the adoption of oxen-ploughing. Production function and covariance analyses showed that those owning oxen achieved higher yields of maize than those hiring oxen or tractors. Those using hoes had the lowest yield as well as the lowest labour productivity. Net cash income per acre was highest for oxen owners (Kshs. 580), but lowest for those hiring private tractor (Kshs. 200). Using owned oxen was more profitable than either hoeing or hiring oxen or tractor for ploughing. The main conclusion of the study is that oxen ploughing provides a viable way to increase the crop acreage and improve timeliness, yields and incomes in the specific region considered. Labour productivity is increased and the total labour requirement for maize production is maintained. Farmers who are willing but unable to invest in improved animal draught equipment should receive government assistance. Public support for tractor hiring service should be deemphasized, and diverted to alternative programs.
description: A thesis submitted for the degree of Doctor of Philosophy, Cornell University.
Propagation of pop ups in kirigami shells
Creators: name: Rafsanjani, Ahmad
name: Jin, Lishuai
name: Deng, Bolei
name: Bertoldi, Katia
Publisher: name: arXiv
Year: 2019
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Kirigami-inspired metamaterials are attracting increasing interest because of their ability to achieve extremely large strains and shape changes via out-of-plane buckling. While in flat kirigami sheets the ligaments buckle simultaneously as Euler columns leading to a continuous phase transition, here we demonstrate that kirigami shells can also support discontinuous phase transitions. Specifically, we show via a combination of experiments, numerical simulations and theoretical analysis that in cylindrical kirigami shells the snapping-induced curvature inversion of the initially bent ligaments results in a pop-up process that first localizes near an imperfection and then, as the deformation is increased, progressively spreads through the structure. Notably, we find that the width of the transition zone as well as the stress at which propagation of the instability is triggered can be controlled by carefully selecting the geometry of the cuts and the curvature of the shell. Our study significantly expands the ability of existing kirigami metamaterials and opens avenues for the design of the next generation of responsive surfaces, as demonstrated by the design of a smart skin that significantly enhance the crawling efficiency of a simple linear actuator.
description: 6 pages, 7 figures, includes Supplementary Information
Rhagovelia ochroischion Nieser & Polhemus 1997
Creators: name: Moreira, Felipe Ferraz Figueiredo
name: Barbosa, Julianna Freires
name: Ribeiro, José Ricardo Inacio
name: Alecrim, Viviani Pereira
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Veliidae
Rhagovelia
Rhagovelia ochroischion

description: Rhagovelia ochroischion Nieser & Polhemus, 1997
Geographical distribution: Brazil.
Distribution in Brazil: Southeast Region (MG) (Nieser & Melo 1997; Nieser & Polhemus 1999).
description: Published as part of Moreira, Felipe Ferraz Figueiredo, Barbosa, Julianna Freires, Ribeiro, José Ricardo Inacio & Alecrim, Viviani Pereira, 2011, Checklist and distribution of semiaquatic and aquatic Heteroptera (Gerromorpha and Nepomorpha) occurring in Brazil 2958, pp. 1-74 in Zootaxa 2958 (1) on page 25, DOI: 10.11646/zootaxa.2958.1.1, http://zenodo.org/record/5281851
No-go for detecting CP violation via neutrinoless double beta decay
Creators: name: Barger, V.
name: Glashow, S. L.
name: Langacker, P.
name: Marfatia, D.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a necessary condition on the solar oscillation amplitude for CP violation to be detectable through neutrinoless double beta (0νββ) decay. It depends only on the fractional uncertainty in the ν_e-ν_e element of the neutrino mass matrix. We demonstrate that even under very optimistic assumptions about the sensitivity of future experiments to the absolute neutrino mass scale, and on the precision with which nuclear matrix elements that contribute to 0νββdecay are calculable, it will be impossible to detect neutrino CP violation arising from Majorana phases.
description: 8 pages, 1 figure
MOESM1 of Assessing public awareness of clubfoot and knowledge about the importance of early childhood treatment: a cross-sectional survey
Creators: name: Abdulmonem Alsiddiky
name: Alrwibaah, Salman
name: Abdulrahman Alqahtani
name: Abdulmalek Alnujidi
name: Alhomaidhi, Abdullah
name: Almasoud, Abdulla
name: Raheef Alatassi
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Science Policy

description: Additional file 1. Questionnaire to assess public knowledge of clubfoot.
Effect of weeding on the growth, yield and yield contributing characters of mungbean (Vigna radiata L.)
Creators: name: Akter, R.
name: Samad, M.A.
name: Zaman, F.
name: Islam, M.S.
name: Akter, R.
name: Samad, M.A.
name: Zaman, F.
name: Islam, M.S.
Publisher: name: Unknown
Year: 2013
Subjects: subject: Crop Production/Industries
subject: Weeding
subject: Mungbean
subject: Growth
subject: Yield
subject: Correlation

description: An experiment was conducted at the Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh to assess the effect of weeding on growth, yield and yield contributing characters of mungbean (Vigna radiata L.) cv. BINA mung- 4 during October 2011 to February 2012. The experiment was laid out in a randomized complete block design with four replications. The trial comprised seven treatments namely, T1 = no weeding, T2 = one-stage weeding (Emergence-Flowering), T3 = one-stage weeding (Flowering-Pod setting), T4 = one-stage weeding (Pod settingMaturity), T5 = two-stage weeding (Emergence-Flowering and Flowering-Pod setting), T6 = two-stage weeding (Flowering-Pod setting and Pod setting-Maturity) and T7 = three-stage weeding (Emergence-Flowering and Flowering-Pod setting and Pod setting-Maturity). The growth parameters such as relative growth rate (0.075 g g-1 day- 1 ) and net assimilation rate (0.075 g m-2day-1) showed the best performance with T2 at one-stage weeding condition (Emergence-Flowering). Three-stage weeding ensured the highest plant height (58.62 cm) as well as the highest number of branches (4.45) and leaves (10.34) plant-1. Dry weight plant-1 (12.38g) was highest from three stage weeding and the lowest from no weeding treatment. The highest number of pods (22.03) plant-1, the longest pod (5.95 cm), the highest number of seeds (17.07) pod-1 and the highest seed yield (1.38 t ha-1) were obtained from three-stage weeding (Emergence-Flowering and Flowering-Pod setting and Pod setting-Maturity) in mungbean. On the other hand, the lowest seed yield was obtained under no weeding condition. The highest seed yield resulted in higher biological yield (4.70 t ha-1) and the highest harvest index (37.15%) in three-stage weeding and the lowest from no weeding. Number of pods plant-1, length of pod, number of seeds pod-1 and 1000-seed weight showed highly significant positive correlations with seed yield. These parameters strongly influenced the growth, yield and yield contributing characters of mungbean (Vigna radiata L.).
Giant Strain Tunability in Polycrystalline Ceramic Films via Helium Implantation
Creators: name: Martínez, A. Blàzquez
name: Glinšek, S.
name: Granzow, T.
name: Audinot, J. -N.
name: Fertey, P.
name: Kreisel, J.
name: Guennou, M.
name: Toulouse, C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Strain engineering is a powerful tool routinely used to control and enhance properties such as ferroelectricity, magnetic ordering, or metal-insulator transitions. Epitaxial strain in thin films allows manipulation of in-plane lattice parameters, achieving strain values generally up to 4%, and above in some specific cases. In polycrystalline films, which are more suitable for functional applications due to their lower fabrication costs, strains above 1% often cause cracking. This poses challenges for functional property tuning by strain engineering. Helium implantation has been shown to induce negative pressure through interstitial implantation, which increases the unit cell volume and allows for continuous strain tuning with the implanted dose in epitaxial monocrystalline films. However, there have been no studies on the transferability of helium implantation as a strain-engineering technique to polycrystalline films. Here, we demonstrate the technique's applicability for strain engineering beyond epitaxial monocrystalline samples. Helium implantation can trigger an unprecedented lattice parameter expansion of up to 3.2% in polycrystalline BiFeO3 films without causing structural cracks. The film maintains stable ferroelectric properties with doses up to 1E15 He/cm2. This finding underscores the potential of helium implantation in strain engineering polycrystalline materials, enabling cost-effective and versatile applications.
description: 9 pages, 4 Figures, supporting information available