cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
19-05-2022 Métodos de selección de sementales y técnicas para reproducción de razas caninas
Creators: name: Aparicio Hernández, Ana Karen
name: Cortés Rodríguez, Montserrath
name: Sanchez Cabrera, Diana
Publisher: name: Zenodo
Year: 2022
Subjects: reproducción animal; inseminación; origen genético; semen; especie canina

description: RESUMEN Para la reproducción de los animales es necesario que tanto la hembra como el macho se encuentren en las mejores condiciones reproductivas, dado que cada uno de ellos, aporta un 50% de sus genes a la siguiente generación de crías, sin embargo, se debe destacar que para un buen semental se debe de hacer una evaluación más precisa [1]. En la selección genética de la especie canina, se toman en cuenta dos perspectivas al momento de seleccionar a los ejemplares; la primera en base a su origen genético, mejor conocida como selección genotípica, y la segunda es basada en la elección de características físicas que pueden ser observables a simple vista, conocida como selección fenotípica. Estas dos formas de selección, son las más exigidos por los criadores para la reproducción de la siguiente generación [2]. Algo indispensable que debe realizarse al momento de la reproducción de los ejemplares (caninos), es un análisis del semen del portador, debido a que es valorado para poder descartar una posible infertilidad o problemas con la muestra de los espermatozoides [3]. Para tener un éxito en la inseminación se debe de tomar en cuenta el estado de salud y la nutrición de los reproductores, así como el manejo al momento de la inseminación, el semen utilizado y la técnica de inseminación [4].
description: {"references": ["Phyllis A Holst. Canine Reproduction. The breeder\u00b4s guide. 2nd ed. Loveland, Colorado. Alpine Blue Ribbon Books, 2000.", "Ca\u00f1\u00f3n J, Cort\u00e9s O. Selecci\u00f3n y cruzamiento en la mejora gen\u00e9tica de las razas. CANIS ET FELIS. 2014:119.", "Arango, Maria E. Evaluaci\u00f3n del Semen Canino, sometido a congelaci\u00f3n con diferentes concentraciones de glicerol como crioprotector. Universidad CES Facultad de Medicina Veterinaria y Zootecnia Biotecnolog\u00eda Reproductiva MEDELLIN. 2009.", "Mar\u00eda A. Stornelli, Rodolfo L. de la Sota. Manual de reproducci\u00f3n de animales de producci\u00f3n y compa\u00f1\u00eda. 1er.ed. Buenos Aires, Argentina. edulp; 2006."]}
Diffractive Bremsstrahlung at High-$β^\star$ LHC Case Study
Creators: name: Chwastowski, J. J.
name: Czekierda, S.
name: Staszewski, R.
name: Trzebiński, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Feasibility studies of the measurement of the exclusive diffractive bremsstrahlung cross-section in proton-proton scattering at the centre of mass energy of 13 TeV at the LHC are reported. Present studies were performed for the low luminosity LHC running with the betatron function value of 90~m using the ATLAS associated forward detectors ALFA and ZDC. A simplified approach to the event simulation and reconstruction is used. The background influence is also discussed.
description: 20 pages, 10 figures. arXiv admin note: substantial text overlap with arXiv:1603.06449
On the Origin of Black Hole Paradoxes
Creators: name: Hajian, Kamal
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Black hole firewall paradox is an inconsistency between four postulates in black hole physics: (1) the unitary evolution in quantum systems, (2) application of the semi-classical field theory in low curvature backgrounds, (3) statistical mechanical origin of the black hole entropy, and (4) the equivalence principle in the version of no drama for free-falling observers in the vicinity of the horizon. Based on the existence of the Hawking radiation for the static observers standing outside a Schwarzschild black hole, we show a direct contradiction between the postulates (2) and (4). If there is not a way out of this new problem, it implies the necessity of relaxing one of these two assumptions for resolving the black hole firewall paradox.
description: 16 pages, 1 figure, published version
Dynamic detection of Malware in android OS
Creators: name: Kundu, Deepanjan
Publisher: name: figshare
Year: 2022
Subjects: Software and application security
System and network security
Data mining and knowledge discovery

description: 2015-2016 thesis
 Malware is increasingly becoming a serious threat and a nuisance in the information and network age. Human experts have to extract (involves complex analysis of encrypted and/or packed binaries) a signature (usually a text pattern) of the malware and deploy it, to protect against a malware. However, this approach does not work for polymorphic and metamorphic malware, which have the ability to change shape from attack to attack; also, metamorphic virus detection even assuming fixed length is NP-complete. There have been numerous static code checking methods which are trying to detect anomalies and report the presence of malware. But in the current time there are numerous code obfuscation techniques which help them get away undetected. What we need is a dynamic method which reads through the processes run by the apps and detects unwanted behavior and reports it. Android Systems have witnessed a plethora of attacks in the recent times all owing to the centralised app store system. A number of malware including several Trojans, spy wares and ad wares have been launched. With the increasing use of Android operating systems and no good antivirus protection for the same we decided to focus our study on these. The aim is to have a signature based on semantics or mining of malware behaviour on the information we collect from the android system and report unexpected and malicious behaviour. In this project, we shall arrive methods to detect infection of android apps., using their dynamic behaviour. Our includes capability to evolve our signature of apps., as different instances are detected.
Higher Morse moduli spaces and n-categories
Creators: name: Hohloch, Sonja
Publisher: name: arXiv
Year: 2017
Subjects: subject: Category Theory (math.CT)
subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 18B99, 18D99, 37D15, 57R99, 58E05

description: We generalize Cohen & Jones & Segal's flow category whose objects are the critical points of a Morse function and whose morphisms are the Morse moduli spaces between the critical points to an n-category. The n-category construction involves repeatedly doing Morse theory on Morse moduli spaces for which we have to construct a class of suitable Morse functions. It turns out to be an `almost strict' n-category, i.e. it is a strict n-category `up to canonical isomorphisms'.
description: 31 pages, 3 figures, 14 diagrams; In accordance with the journal's copyright, I am making the preprint version of the published paper available on the arXiv
01-09-2021 Discusión del artículo: Phenotypic variation in Azospirillum brasilense Sp7 does not influence plant growth promotion effects (Volfson et al., 2013)
Creators: name: Conde Cuautle, Carolina
Publisher: name: Zenodo
Year: 2021
Subjects: Azospirillum brasilense; exopilisacáridos; resistencia a estrés; fitoestimulación; PGPR

description: RESUMEN Las bacterias del género Azospirillum son fijadoras de nitrógeno, promueven el crecimiento de las plantas, producen fitohormonas, entre algunas características adicionales, originando un mayor rendimiento en los cultivos para especies de importancia agrónomica (Domingues et al., 2020). Dentro de los componentes de su superficie bacteriana encontramos polisacáridos como lo son lipopolisacáridos, polisacáridos capsulares y extrapolisacáridos, las propiedades de estos últimos participan en la protección contra el estrés ambiental, adherencia a superficies, recolección de nutrientes, entre algunos más (Volfson et al., 2013). La variación fenotípica permite que los microorganismos se adapten a los cambios ambientales y se caracteriza al momento de que una subpoblación es diferente a la población principal, existen reportes de cepas de Azospirillum que han identificado variantes fenotípicas, tal es el caso de Azospirillum brasilense Sp7 (Katupitiya et al., 1995; Volfson et al., 2013). En este estudio Volfson et al., (2013) se encargaron de estudiar los aspectos fisiológicos de la variación fenotípica de Azospirillum brasilense Sp7, encontraron que las variantes más representativas sobreproducían exopolisacáridos en cantidades de 7.5 a 8 veces más que la cepa parental, aunque con diferente composición de monosacáridos. Las variantes mostraron resistencia al calor y a la radiación UV contrario a la cepa Sp7 y se observaron cambios genómicos. En los experimentos de inoculación se evaluaron cuatro especies de plantas en invernadero, mostrando que las variantes inoculadas no generaban cambios significativos en la promoción del crecimiento de las plantas en comparación a la cepa parental.
description: {"references": ["Domingues Duarte, Camila Fernandes, Cecato, Ulysses, Trento Biserra, Thiago, Mam\u00e9dio, Divaney, & Galbeiro, Sandra. (2020). Azospirillum spp. en gram\u00edneas y forrajeras. Revisi\u00f3n. Revista mexicana de ciencias pecuarias, 11(1), 223-240. Epub 11 de junio de 2020.https://doi.org/10.22319/rmcp.v11i1.4951", "Katupitiya, S., Millet, J., Vesk, M., Viccars, L., Zeman, A., Lidong, Z., ... & Kennedy, I. R. (1995). A mutant of Azospirillum brasilense Sp7 impaired in flocculation with a modified colonization pattern and superior nitrogen fixation in association with wheat. Applied and Environmental Microbiology, 61(5), 1987-1995.", "Volfson, V., Fibach-Paldi, S., Paulucci, N. S., Dardanelli, M. S., Matan, O., Burdman, S., & Okon, Y. (2013). Phenotypic variation in Azospirillum brasilense Sp7 does not influence plant growth promotion effects. Soil Biology and Biochemistry, 67, 255-262."]}
Koopman and Perron-Frobenius Operators on reproducing kernel Banach spaces
Creators: name: Ikeda, Masahiro
name: Ishikawa, Isao
name: Schlosser, Corbinian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 47B33

description: Koopman and Perron-Frobenius operators for dynamical systems have been getting popular in a number of fields in science these days. Properties of the Koopman operator essentially depend on the choice of function spaces where it acts. Particularly the case of reproducing kernel Hilbert spaces (RKHSs) draws more and more attention in data science. In this paper, we give a general framework for Koopman and Perron-Frobenius operators on reproducing kernel Banach spaces (RKBSs). More precisely, we extend basic known properties of these operators from RKHSs to RKBSs and state new results, including symmetry and sparsity concepts, on these operators on RKBS for discrete and continuous time systems.
description: We add a reference and correct some typos
Sign Flip in the Casimir Force for Interacting Fermion Systems
Creators: name: Flachi, Antonino
name: Nitta, Muneto
name: Takada, Satoshi
name: Yoshii, Ryosuke
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work we consider a fermionic chain of finite length $\ell$. Fermions are allowed to interact and are forced to obey boundary conditions, thus altering the process of condensation. Our goal is to explore how this affects the quantum vacuum energy for this system. We approach this problem by using a self-consistent method and observe a nontrivial behavior in the Casimir force, displaying a switch from an attractive to a repulsive regime. This flip stems from the competition between the attractive contribution from the usual fermionic Casimir effect and a repulsive one coming from the condensate.
description: 6 pages, 2 figures
Dynamic_detection_of_Malware_in_android_OS.pdf
Creators: name: Kundu, Deepanjan
Publisher: name: figshare
Year: 2022
Subjects: Software and application security
System and network security

description: 2015-2016 thesis
 Malware is increasingly becoming a serious threat and a nuisance in the information and network age. Human experts have to extract (involves complex analysis of encrypted and/or packed binaries) a signature (usually a text pattern) of the malware and deploy it, to protect against a malware. However, this approach does not work for polymorphic and metamorphic malware, which have the ability to change shape from attack to attack; also, metamorphic virus detection even assuming fixed length is NP-complete. There have been numerous static code checking methods which are trying to detect anomalies and report the presence of malware. But in the current time there are numerous code obfuscation techniques which help them get away undetected. What we need is a dynamic method which reads through the processes run by the apps and detects unwanted behavior and reports it. Android Systems have witnessed a plethora of attacks in the recent times all owing to the centralised app store system. A number of malware including several Trojans, spy wares and ad wares have been launched. With the increasing use of Android operating systems and no good antivirus protection for the same we decided to focus our study on these. The aim is to have a signature based on semantics or mining of malware behaviour on the information we collect from the android system and report unexpected and malicious behaviour. In this project, we shall arrive methods to detect infection of android apps., using their dynamic behaviour. Our includes capability to evolve our signature of apps., as different instances are detected.
Low-temperature heat transport of CuFe$_{1-x}$Ga$_x$O$_2$ ($x =$ 0--0.12) single crystals
Creators: name: Song, J. D.
name: Wang, X. M.
name: Zhao, Z. Y.
name: Wu, J. C.
name: Zhao, J. Y.
name: Liu, X. G.
name: Zhao, X.
name: Sun, X. F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a study on the thermal conductivity of CuFe$_{1-x}$Ga$_x$O$_2$ ($x =$ 0--0.12) single crystals at temperatures down to 0.3 K and in magnetic fields up to 14 T. CuFeO$_2$ is a well-known geometrically frustrated triangular lattice antiferromagnet and can be made to display multiferroicity either by applying magnetic field along the $c$ axis or by doping nonmagnetic impurities, accompanied with rich behaviors of magnetic phase transitions. The main experimental findings of this work are: (i) the thermal conductivities ($κ_a$ and $κ_c$) show drastic anomalies at temperature- or field-induced magnetic transitions; (ii) the low-$T$ $κ(H)$ isotherms exhibit irreversibility in a broad region of magnetic fields; (iii) there are phonon scattering effect caused by magnetic fluctuations at very low temperatures. These results demonstrate strong spin-phonon coupling in this material and reveal the non-negligible magnetic fluctuations in the "ground state" of pure and Ga-doped samples.
description: 11 pages, 12 figures, accepted for publication in Phys. Rev. B
Probing weak dipole-dipole interaction using phase-modulated non-linear spectroscopy
Creators: name: Li, Zeng-Zhao
name: Bruder, Lukas
name: Stienkemeier, Frank
name: Eisfeld, Alexander
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Phase-modulated non-linear spectroscopy with higher harmonic demodulation has recently been suggested to provide information on many-body excitations. In the present work we theoretically investigate the application of this method to infer the interaction strength between two particles that interact via weak dipole-dipole interaction. To this end we use full numerical solution of the Schrödinger equation with time-dependent pulses. For interpretation purpose we also derive analytical expressions in perturbation theory. We find one can detect dipole-dipole interaction via peak intensities (in contrast to line-shifts which typically are used in conventional spectroscopy). We provide a detailed study on the dependence of these intensities on the parameters of the laser pulse and the dipole-dipole interaction strength. Interestingly, we find that there is a phase between the first and second harmonic demodulated signal, whose value depends on the sign of the dipole-dipole interaction.
description: 12 pages, 8 figures, Supporting information provided with the source files
Concentration of invariant means and dynamics of chain stabilizers in continuous geometries
Creators: name: Schneider, Friedrich Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: Group Theory (math.GR)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 22A10, 43A07, 06C20, 16E50

description: We prove a concentration inequality for invariant means on topological groups, namely for such adapted to a chain of amenable topological subgroups. The result is based on an application of Azuma's martingale inequality and provides a method for establishing extreme amenability. Building on this technique, we exhibit new examples of extremely amenable groups arising from von Neumann's continuous geometries. Along the way, we also answer a question by Pestov on dynamical concentration in direct products of amenable topological groups.
description: 60 pages, no figures; v2: exposition streamlined, some notation revised, Corollary 1.6 added, 62 pages
Majorana Zero Modes Protected by Hopf Invariant in Topologically Trivial Superconductors
Creators: name: Yan, Zhongbo
name: Bi, Ren
name: Wang, Zhong
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Majorana zero modes are usually attributed to topological superconductors. We study a class of two-dimensional topologically trivial superconductors without chiral edge modes, which nevertheless host robust Majorana zero modes in topological defects. The construction of this minimal single-band model is facilitated by the Hopf map and the Hopf invariant. This work will stimulate investigations of Majorana zero modes in superconductors in the topologically trivial regime.
description: 15 pages, 6 figures, including supplemental material. The published version is slightly shortened
The POKEMON Speckle Survey of Nearby M Dwarfs. I. New Discoveries
Creators: name: Clark, Catherine A.
name: van Belle, Gerard T.
name: Horch, Elliott P.
name: von Braun, Kaspar
name: Ciardi, David R.
name: Winters, Jennifer G.
name: Kiman, Rocio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: M dwarfs are favorable targets for exoplanet detection with current instrumentation, but stellar companions can induce false positives and inhibit planet characterization. Knowledge of stellar companions is also critical to our understanding of how binary stars form and evolve. We have therefore conducted a survey of stellar companions around nearby M dwarfs, and here we present our new discoveries. Using the DSSI speckle imager at the 4.3-meter Lowell Discovery Telescope, and the similar NESSI instrument at the 3.5-meter WIYN telescope, we carried out a volume-limited survey of M-dwarf multiplicity to 15 parsecs, with a special emphasis on including the later M dwarfs that were overlooked in previous surveys. Additional brighter targets at larger distances were included for a total sample size of 1070 M dwarfs. Observations of these 1070 targets revealed 26 new companions; 22 of these systems were previously thought to be single. If all new discoveries are confirmed, then the number of known multiples in the sample will increase by 7.6%. Using our observed properties, as well as the parallaxes and 2MASS K magnitudes for these objects, we calculate the projected separation, and estimate the mass ratio and component spectral types, for these systems. We report the discovery of a new M-dwarf companion to the white dwarf Wolf 672 A, which hosts a known M-dwarf companion as well, making the system trinary. We also examine the possibility that the new companion to 2MASS J13092185-2330350 is a brown dwarf. Finally, we discuss initial insights from the POKEMON survey.
description: 23 pages, 6 figures, 5 tables. Accepted for publication in the Astronomical Journal
Fluidization and Active Thinning by Molecular Kinetics in Active Gels
Creators: name: Oriola, David
name: Alert, Ricard
name: Casademunt, Jaume
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We derive the constitutive equations of an active polar gel from a model for the dynamics of elastic molecules that link polar elements. Molecular binding kinetics induces the fluidization of the material, giving rise to Maxwell viscoelasticity and, provided that detailed balance is broken, to the generation of active stresses. We give explicit expressions for the transport coefficients of active gels in terms of molecular properties, including nonlinear contributions on the departure from equilibrium. In particular, when activity favors linker unbinding, we predict a decrease of viscosity with activity - active thinning - of kinetic origin, which could explain some experimental results on the cell cortex. By bridging the molecular and hydrodynamic scales, our results could help understand the interplay between molecular perturbations and the mechanics of cells and tissues.
description: 6 pages, 2 figures
Vortices in a parity-invariant Maxwell-Chern-Simons model
Creators: name: De Lima, W. B.
name: De Fabritiis, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In this work we propose a parity-invariant Maxwell-Chern-Simons $U(1) \times U(1)$ model coupled with two charged scalar fields in $2+1$ dimensions, and show that it admits finite-energy topological vortices. We describe the main features of the model and find explicit numerical solutions for the equations of motion, considering different sets of parameters and analyzing some interesting particular regimes. We remark that the structure of the theory follows naturally from the requirement of parity invariance, a symmetry that is rarely envisaged in the context of Chern-Simons theories. Another distinctive aspect is that the vortices found here are characterized by two integer numbers.
description: 15 pages, 18 figures. Revised version. Accepted for publication in MPLA
02-09-2021 La importancia de la relación simbiótica en el rumen
Creators: name: Iturbe Flores, Clarisa
name: Pinacho Mercado, Scarleth
Publisher: name: Zenodo
Year: 2021
Subjects: ganado; rumen; mutualismo; rumiantes; fermentación y digestión

description: RESUMEN En México la introducción de ganado fue un paso que marcó la historia, pues al principio solo se criaban especies como el guajolote, pero los españoles al conquistar y crear la Nueva España, trajeron consigo a los que conocemos hoy en día como animales domésticos; como los bovinos, caballos e incluso cerdos. En un principio, esto implicó una forma rara de vida para los indígenas, pero rápidamente se acoplaron y con el tiempo fueron dándole más beneficios en la alimentación de las personas [1]. Existe un micro-ecosistema en el rumen de algunas especies animales, en las que se realiza un proceso de fermentación y digestión para la desintegración y degradación de materia o alimento, en el caso de estos individuos, presentan una interacción con ciertas bacterias para ayudarles con ese proceso [2]. La relación que se crea entre rumiantes y bacterias se le denomina simbiosis, una relación en la que ambas poblaciones de la interacción se benefician del proceso y el sustrato que entra al mismo [3].
description: {"references": ["Mart\u00ednez, B. B. (s.f.). Los primeros pasos del ganado en M\u00e9xico. Recuperado el 10 de Agosto de 2021, de El Colegio de M\u00e9xico: https://www.colmich.edu.mx/relaciones25/files/revistas/059/BernardoGarciaMartinez.pdf", "Carrasco, D. G. (29 de febrero de 2016). Ganaderia.com. Recuperado el 11 de agosto de 2021, de Aspectos generales sobre el rumen y su fisiolog\u00eda:https://www.ganaderia.com/destacado/Aspectos-generales-sobre-el-rumen-y-sufisiologia#:~:text=Bacterias%20del%20rumen%3A,de%20espiroquetas%2C%20rosetas%20 y%20tetracocos", "An\u00f3nimo. (20 de mayo de 2021). WWF. Recuperado el 11 de agosto de 2021, de Las relaciones simbi\u00f3ticas: el gran v\u00ednculo e interacci\u00f3n entre las especies: https://www.wwf.cl/?367017/Las-relaciones-simbioticas-el-gran-vinculo-e-interaccionentre-las-especies"]}
Dynamic disorder in simple enzymatic reactions induces stochastic amplification of substrate
Creators: name: Gupta, Ankit
name: Milias-Argeitis, Andreas
name: Khammash, Mustafa
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Probability (math.PR)
subject: FOS: Biological sciences
subject: FOS: Mathematics
subject: 92C42, 92C45, 60J22, 60J28, 65C40

description: A growing amount of evidence points to the fact that many enzymes exhibit fluctuations in their catalytic activity, which are associated with conformational changes on a broad range of timescales. The experimental study of this phenomenon, termed dynamic disorder, has become possible due to advances in single-molecule enzymology measurement techniques, through which the catalytic activity of individual enzyme molecules can be tracked in time. The biological role and importance of these fluctuations in a system with a small number of enzymes such as a living cell have only recently started being explored. In this work, we examine a simple stochastic reaction system consisting of an inflowing substrate and an enzyme with a randomly fluctuating catalytic reaction rate that converts the substrate into an outflowing product. To describe analytically the effect of rate fluctuations on the average substrate abundance at steady-state, we derive an explicit formula that connects the relative speed of enzymatic fluctuations with the mean substrate level. We demonstrate that the relative speed of rate fluctuations can have a dramatic effect on the mean substrate, and lead to large positive deviations from predictions based on the assumption of deterministic enzyme activity. Our results also establish an interesting connection between the amplification effect and the mixing properties of the Markov process describing the enzymatic activity fluctuations, which can be used to easily predict the fluctuation speed above which such deviations become negligible. As the techniques of single-molecule enzymology continuously evolve, it may soon be possible to study the stochastic phenomena due to enzymatic activity fluctuations within living cells. Our work can be used to formulate experimentally testable hypotheses regarding the magnitude of these fluctuations, as well as their phenotypic consequences.
description: 7 Figures
Heteroepitaxial growth of tetragonal Mn$_{2.7-x}$Fe$_{x}$Ga$_{1.3}$ (0 $\leqslant$ x $\leqslant$ 1.2) Heusler films with perpendicular magnetic anisotropy
Creators: name: Kalache, Adel
name: Markou, Anastasios
name: Selle, Susanne
name: Höche, Thomas
name: Fecher, Gerhard H.
name: Felser, Claudia
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This work reports on the structural and magnetic properties of Mn$_{2.7-x}$Fe$_{x}$Ga$_{1.3}$ Heusler films with different Fe content x (0 $\leqslant$ x $\leqslant$ 1.2). The films were deposited heteroepitaxially on MgO single crystal substrates, by magnetron sputtering. Mn$_{2.7-x}$Fe$_{x}$Ga$_{1.3}$ films with the thickness of 35 nm were crystallized in tetragonal D0$_{22}$ structure with (001) preferred orientation. Tunable magnetic properties were achieved by changing the Fe content x. Mn$_{2.7-x}$Fe$_{x}$Ga$_{1.3}$ thins films exhibit high uniaxial anisotropy Ku $\geqslant$ 1.4 MJ/m3, coercivity from 0.95 to 0.3 T and saturation magnetization from 290 to 570 kA/m. The film with Mn$_{1.6}$Fe$_{1.1}$Ga$_{1.3}$ composition shows high Ku of 1.47 MJ/m3 and energy product ${(BH)_{max}}$ of 37 kJ/m3, at room temperature. These findings demonstrate that Mn$_{2.7-x}$Fe$_{x}$Ga$_{1.3}$ films have promising properties for mid-range permanent magnet and spintronic applications.
description: 13 pages, 5 figures and 2 tables
Inner cusps of the first dark matter haloes: Formation and survival in a cosmological context
Creators: name: Delos, M. Sten
name: White, Simon D. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use very high resolution cosmological zoom simulations to follow the early evolution of twelve first-generation haloes formed from gaussian initial conditions with scale-free power spectra truncated on small scales by a gaussian in wavenumber. Initial collapse occurs with a diverse range of sheet- or filament-like caustic morphologies, but in almost all cases it gives rise to a numerically converged density cusp with $ρ= Ar^{-3/2}$ and total mass comparable to that of the corresponding peak in the initial linear density field. The constant $A$ can be estimated to within about 10 per cent from the properties of this peak. This outcome agrees with earlier work on the first haloes in cold and warm dark matter universes. Within central cusps, the velocity dispersion is close to isotropic, and the equidensity surfaces tend to align with those of the main body of the halo at larger radii. As haloes grow, their cusps are often (but not always) overlaid with additional material at intermediate radii to produce profiles more similar to the Einasto or NFW forms typical of more massive haloes. Nevertheless, to the extent that we can resolve them, cusps survive at the smallest radii. Major mergers can disturb them, but the effect is quite weak in the cases that we study. The cusps extend down to the resolution limits of our simulations, which are typically a factor of several larger than the cores that would be produced by phase-space conservation if the initial power spectrum cutoff arises from free streaming.
description: 24 pages, 29 figures; accepted by MNRAS. Includes further numerical convergence tests
Engaging data repositories in EOSC (Presented at EOSC Symposium 2022)
Creators: name: Weisweiler, Nina
Publisher: name: Forschungzentrum Jülich
Year: 2022

description: EOSC Symposium, ; doi:10.5281/ZENODO.7334302
description: Research data repositories are key infrastructures for successful research data management. re3data is the largest directory of research data repositories, providing detailed and comprehensive information to support its users in finding the most suitable repository for their needs. The openly accessible index currently lists almost 3000 digital repositories across all scientific disciplines. The talk presented the current status and the latest accomplishments of re3data and highlighted how the service contributes to the overall EOSC ecosystem, such as the EOSC Portal Marketplace, the OpenAIRE Open Science Observatory, or the B2FIND service. Session program: https://symposium22.eoscfuture.eu/symposium/engagement-of-research-communities-and-service-providers-in-eosc/
25-06-2021 Caracterización microbiológica del queso panela oreado de Soyatlán, Jalisco/ Microbiological characterization of aired panela cheese from Soyotlan, Jalisco
Creators: name: Pérez Esteban, Guillermo
Publisher: name: Zenodo
Year: 2021
Subjects: Cheese; microbiota; bacteria.

description: Abstract Panela oreado cheese from Soyatlán, Jalisco, is a traditional Mexican cheese with unique characteristics: history, know-how and unique sensorial characteristics, due to the raw material and the microbiota of the milk and the environment; these factors influence and give typicity to this great Mexican cheese. Proximal analyzes in milk and cheese and microbiological analyzes thereof presented significant statistical differences (α = 0.05) in both seasons. As for milk, the milk fat and protein components were statistically higher in the rainy season than in the dry season. In cheese, the components that varied were fat and minerals. Staphylococcus aureus, total coliform, and yeast bacteria counts were above that established by NOM-243-SSA1-2010, while the identification of Salmonella spp. was found to be negative in 25 g. The sensorial characterization of panela oreado cheese, evaluated through the quantitative descriptive analysis (QDA) technique, showed that the sensorial attributes that characterize the sampled cheeses are: fermented dairy aroma, acidic taste, presence of holes, moist appearance and yellowing. Genotypically, isolated yeasts (12 strains) of the panela cheese were also identified. Species recognized in the panela cheese from Soyatlán, Jalisco were: Kluyveromyces lactis, Yarrowia lipolytica, Debaryomyces hansenii, Candida parapsilosis and Candida sp. It can be inferred that these isolated and identified yeasts confer sensory qualities on panela cheese made from raw milk.
Anomalous screening of quantum impurities by a neutral environment
Creators: name: Yakaboylu, Enderalp
name: Lemeshko, Mikhail
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: It is a common knowledge that an effective interaction of a quantum impurity with an electromagnetic field can be screened by surrounding charge carriers, whether mobile or static. Here we demonstrate that very strong, `anomalous' screening can take place in the presence of a neutral, weakly-polarizable environment, due to an exchange of orbital angular momentum between the impurity and the bath. Furthermore, we show that it is possible to generalize all phenomena related to isolated impurities in an external field to the case when a many-body environment is present, by casting the problem in terms of the angulon quasiparticle. As a result, the relevant observables such as the effective Rabi frequency, geometric phase, and impurity spatial alignment are straightforward to evaluate in terms of a single parameter: the angular-momentum-dependent screening factor.
description: 6 pages, 2 figures including appendix
Thermoelastic Damping in MEMS Gyroscopes at High Frequencies
Creators: name: Schiwietz, Daniel
name: Weig, Eva M.
name: Degenfeld-Schonburg, Peter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Microelectromechanical systems (MEMS) gyroscopes are widely used, e.g. in modern automotive and consumer applications, and require signal stability and accuracy in rather harsh environmental conditions. In many use cases, device reliability must be guaranteed under large external loads at high frequencies. The sensitivity of the sensor to such external loads depends strongly on the damping, or rather quality factor, of the high frequency mechanical modes of the structure. In this paper, we investigate the influence of thermoelastic damping on several high frequency modes by comparing finite element simulations with measurements of the quality factor in an application-relevant temperature range. We measure the quality factors over different temperatures in vacuum, to extract the relevant thermoelastic material parameters of the polycrystalline MEMS device. Our simulation results show a good agreement with the measured quantities, therefore proving the applicability of our method for predictive purposes in the MEMS design process. Overall, we are able to uniquely identify the thermoelastic effects and show their significance for the damping of the high frequency modes of an industrial MEMS gyroscope. Our approach is generic and therefore easily applicable to any mechanical structure with many possible applications in nano- and micromechanical systems.
Non-Gaussian and loop effects of inflationary correlation functions in BRST formalism
Creators: name: Kitamoto, Hiroyuki
name: Kitazawa, Yoshihisa
name: Kojima, Ryota
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate inflationary correlation functions in single field inflation models. We adopt a BRST formalism where locality and covariance at the sub-horizon scale are manifest. The scalar and tensor perturbations are identified with those in the comoving gauge which become constant outside the cosmological horizon. Our construction reproduces the identical non-Gaussianity with the standard comoving gauge. The accumulation of almost scale invariant fluctuations could give rise to IR logarithmic corrections at the loop level. We investigate the influence of this effect on the sub-horizon dynamics. Since such an effect must respect covariance, our BRST gauge has an advantage over the standard comoving gauge. We estimate IR logarithmic effects to the slow-roll parameters at the one-loop level. We show that $ε$ receives IR logarithmic corrections, while this is not the case for $η$. We point out that IR logarithmic effects provide the shift symmetry breaking mechanism. This scenario may lead to an inflation model with a linear potential.
description: 22 pages, 3 figures
Ergebnisse des Projekts ORCID DE 2
Creators: name: Schrader, Antonia
Publisher: name: Forschungzentrum Jülich
Year: 2022
Subjects: ORCID
Open Researcher and Contributor ID
ORCID DE
Autorenidentifikation
PID
Persistent Identifier
Open Science

description: 6. ORCID DE Workshop, ; doi:10.5281/ZENODO.6519671
description: Antonia Schrader vom Helmholtz Open Science Office der Helmholtz-Gemeinschaft stellt die Ergebnisse des Projektes ORCID DE 2 auf dem 6. ORCID DE Workshop zu ORCID in erweiterten Kontexten am 04. Mai 2022 vor. Das Projekt wird im November 2022 enden.
Stabilized Benders decomposition for energy planning under climate uncertainty
Creators: name: Göke, Leonard
name: Schmidt, Felix
name: Kendziorski, Mario
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This paper applies Benders decomposition to two-stage stochastic problems for energy planning under climate uncertainty, a key problem for the design of renewable energy systems. To improve performance, we adapt various refinements for Benders decomposition to the problem's characteristics -- a simple continuous master-problem, and few but large sub-problems. The primary focus is stabilization, specifically comparing established bundle methods to a quadratic trust-region approach for continuous problems. An extensive computational comparison shows that all stabilization methods can significantly reduce computation time. However, the quadratic trust-region and the non-quadratic box-step method are the most robust and straightforward to implement. When parallelized, the introduced algorithm outperforms the vanilla version of Benders decomposition by a factor of 100. In contrast to off-the-shelf solvers, computation time remains constant when the number of scenarios increases. In conclusion, the algorithm enables robust planning of renewable energy systems with a large number of climatic years. Beyond climate uncertainty, it can make an extensive range of other analyses in energy planning computationally tractable, for instance, endogenous learning and modeling to generate alternatives.
31-07-2022 Bacterias tolerantes a la desecación adaptadas al frío aisladas de suelos polares que presentan alta resistencia a la anhidrobiosis
Creators: name: Cid-Arriaga, Grecia
Publisher: name: Zenodo
Year: 2022
Subjects: bacterias; tolerancia a la desecación; estrés hídrico; resistencia a cloroformo; supervivencia

description: RESUMEN La presente charla se basa en el manuscrito de Nóbrega et al., 2021 [1]. En este trabajo se realizó un aislamiento de bacterias de suelos polares, las cuales deben estar acopladas a las bajas temperaturas y al estrés hídrico debido a la falta de agua en estado líquido en este ambiente. Se evaluó la tolerancia a la desecación de cada cepa a lo largo del tiempo y la influencia de la solución de presecado empleada. Se identificaron 23 cepas únicas pertenecientes a los filos: actinobacteria (1), proteobacterias (4) y firmicutes (18). Se observó una clara diferencia entre la tasa de supervivencia de los microorganismos con la solución empleada antes del secado, probando ser el medio RB2 más protector que el agua pura. Como una nueva metodología para la selección de bacterias tolerantes a la desecación se utilizó el cloroformo, seleccionando a las cepas resistentes a los disolventes orgánicos con resultados eficaces y rápidos. La proliferación de cepas del filo firmicutes se observó favorecida debido a su gruesa capa de peptidoglicano y a su capacidad de formación de esporas, lo que les permiten sobrellevar durante largos periodos los desafíos químicos y ambientales. Los resultados de este estudio abren paso al conocimiento sobre los límites de supervivencia de la vida más allá de la Tierra.
description: {"references": ["N\u00f3brega, F., Duarte, R., Torres-Ballesteros, A., Lopes, L., Whyte, L., Pellizar, V. (2021). Cold adapted desiccation-tolerant bacteria isolated from polar soils presenting high resistance to anhydrobiosis. BioRxiv, 1-25, doi: https://doi.org/10.1101/2021.02.06.430066"]}
Develop & Curate – Einträge für Forschungsdatenrepositorien in re3data erstellen, bearbeiten, durchsuchen und nachnutzen
Creators: name: Strecker, Dorothea
name: Schabinger, Rouven
name: Weisweiler, Nina
Publisher: name: Forschungzentrum Jülich
Year: 2022

description: 110. Deutscher Bibliothekartag in Leipzig 2022 = 8. Bibliothekskongress, Leipzig, Germany, 31 May 2022 - 2 Jun 2022
description: Das internationale Nachweisinstrument für Forschungsdatenrepositorien re3data – Registry of Research Data Repositories weist derzeit (September 2021) über 2700 Repositorien aus allen wissenschaftlichen Disziplinen nach. Die frei zugängliche Infrastruktur wurde im Rahmen zweier durch die Deutsche Forschungsgemeinschaft geförderter Projekte entwickelt. re3data bietet umfassende Beschreibungen der Repositorien auf Grundlage eines detaillierten Metadatenschemas, dessen aktualisierte Version kürzlich publiziert wurde(https://doi.org/10.2312/re3.008).Der Dienst fördert Open-Science-Praktiken und die Sichtbarkeit wissenschaftsgetriebener offener Infrastrukturen. Wissenschaftliche Communities, Förderorganisationen, Bibliotheken und andere wissenschaftliche Infrastrukturen nutzen und empfehlen den Dienst an Forschende.Nach einer kurzen Vorstellung des Dienstes und des Projektes re3data COREF, das für die Weiterentwicklung von re3data verantwortlich ist, folgt der praktische Teil: Im Hands-on Lab wird aufgezeigt, welche Informationen ein re3data-Eintrag enthalten sollte, um eine maximale Sichtbarkeit für das Repositorium zu gewährleisten. Der Aufnahmeprozess für Repositorien wird erläutert und die Teilnehmer*innen erfahren, wie sie neue Einträge und Änderungsvorschläge einreichen können. Ergänzend zum Aspekt der Informationsanreicherung wird es auch einen Teil geben, der sich mit der Nutzung und Auswertung von re3data-Metadaten befasst. re3data bietet über seine Benutzungsoberfläche sowie per API allen Nutzer*innen zentrale Anlaufpunkte für den Zugriff auf ihre Daten und freien digitalen Ressourcen. Wir stellen Ihnen die API vor (aufbereitete Datensets, Schnittstellen und Metadatenformate) und zeigen Ihnen in dieser Einführungsveranstaltung, wie Sie mit der freien Software R unsere Daten abrufen können. Teilnehmer*innen können die bereitgestellten Jupyter Notebooks über den eigenen Browser nutzen. Vorwissen oder lokal installierte Software sind nicht erforderlich.
Robert F. Berkhofer III., Forgeries and Historical Writing in England, France, and Flanders, 900–1200, Rochester, NY (Boydell & Brewer) 2022
Creators: name: Morelle, Laurent
Publisher: name: Francia-Recensio
Year: 2022

description: Robert F. Berkhofer III., Forgeries and Historical Writing in England, France, and Flanders, 900–1200, Rochester, NY (Boydell & Brewer) 2022, 348 p. (Medieval Documentary Cultures), ISBN 978-1-78327-691-2, USD 99,00.
description: Francia-Recensio, 2022/4
On the Possibility of Singularities on the Ambient Boundary
Creators: name: Papadopoulos, Kyriakos
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The order horismos induces the Zeeman $Z$ topology, which is coarser than the Fine Zeeman Topology $F$. The causal curves in a spacetime under $Z$ are piecewise null. $F$ is considered to be the most physical topology in a spacetime manifold $M$, as the group of homeomorphisms of $M$ is isomorphic to the group of homothetic transformations of $M$. $Z$ was used in the Ambient Boundary-Ambient Space cosmological model, in order to show that there is no possibility of formation of spacetime singularities. In this article we question this result, by reviewing the corresponding articles, and we propose new questions towards the improvement of this model.
Stefan Zeppenfeld, Vom Gast zum Gastwirt? Türkische Arbeitswelten in West-Berlin, Göttingen (Wallstein) 2021
Creators: name: Tietze, Nikola
Publisher: name: Francia-Recensio
Year: 2022

description: Stefan Zeppenfeld, Vom Gast zum Gastwirt? Türkische Arbeitswelten in West-Berlin, Göttingen (Wallstein) 2021, 430 S., 13 Abb. (Geschichte der Gegenwart, 26), ISBN 978-3-8353-5022-9, EUR 39,00.
description: Francia-Recensio, 2022/4
Ultradense dark matter haloes accompany primordial black holes
Creators: name: Delos, M. Sten
name: Silk, Joseph
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Primordial black holes (PBHs) form from large-amplitude initial density fluctuations and may comprise some or all of the dark matter. If PBHs have a broadly extended mass spectrum, or in mixed PBH-particle dark matter scenarios, the extreme density fluctuations necessary to produce PBHs also lead to the formation of a much greater abundance of dark matter minihaloes that form during the radiation epoch with internal densities potentially of order $10^{12}$ M$_\odot$ pc$^{-3}$. We develop an analytic description of the formation of these ultradense haloes and use it to quantitatively compare PBH and halo distributions. PBHs that contribute only a per cent level fraction of the dark matter are accompanied by ultradense haloes that nevertheless comprise an order-unity fraction. These haloes would consist of either particle dark matter or much smaller PBHs. This finding significantly alters the predictions of many PBH scenarios, enabling a variety of new observational tests.
description: 6 pages, 3 figures; accepted for publication in MNRAS. Includes expanded discussions of the connection between PBH and halo masses and of the outlook for these results