cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Transformational Leadership Is the Foundation of Sustainability and Employee Performance in An Organization
Creators: name: Jamil, Sobia
name: Miao, Miao
name: Zaman3, Syed Imran
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 350204
subject: Financial institutions (incl. banking)

description: This is the research manuscript to save detail here for DOI.
Wave packet dynamics in monolayer MoS$_2$ with and without a magnetic field
Creators: name: Singh, Ashutosh
name: Biswas, Tutul
name: Ghosh, Tarun Kanti
name: Agarwal, Amit
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the dynamics of electrons in monolayer Molybdenum Disulfide (MoS$_2$), in the absence as well as presence of a transverse magnetic field. Considering the initial electronic wave function to be a Gaussian wave packet, we calculate the time dependent expectation value of position and velocity operators. In the absence of the magnetic field, the time dependent average values of position and velocity show damped oscillations dependent on the width of the wave packet. In the presence of a transverse magnetic field, the wave packet amplitude shows oscillatory behaviour over short timescales associated with classical cyclotron orbit, followed by the phenomena of spontaneous collapse and revival over larger timescales. We relate the timescales of these effects and our results can be useful for the interpretation of experiments with trapped ions.
description: 8pages, 3 figures. typos corrected and improved presentation
On the impact of correlations on the congruence test: a bootstrap approach: Case study: B-spline surface fitting from TLS observations
Creators: name: Gaël, Kermarrec
name: Boris, Kargoll
name: Hamza, Alkhatib
Publisher: name: Cham : Springer
Year: 2020
Subjects: subject: Bootstrap
subject: Congruency test
subject: Correlation
subject: Deformation
subject: Matérn covariance function
subject: Statistical test
subject: Terrestrial laser scanner
subject: Variance component estimation
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: The detection of deformation is one of the major tasks in surveying engineering. It is meaningful only if the statistical significance of the distortions is correctly investigated, which often underlies a parametric modelization of the object under consideration. So-called regression B-spline approximation can be performed for point clouds of terrestrial laser scanners, allowing the setting of a specific congruence test based on the B-spline surfaces. Such tests are known to be strongly influenced by the underlying stochastic model chosen for the observation errors. The latter has to be correctly specified, which includes accounting for heteroscedasticity and correlations. In this contribution, we justify and make use of a parametric correlation model called the Matérn model to approximate the variance covariance matrix (VCM) of the residuals by performing their empirical mode decomposition. The VCM obtained is integrated into the computation of the congruence test statistics for a more trustworthy test decision. Using a real case study, we estimate the distribution of the test statistics with a bootstrap approach, where no parametric assumptions are made about the underlying population that generated the random sample. This procedure allows us to assess the impact of neglecting correlations on the critical value of the congruence test, highlighting their importance.
Local Density of States in a Helical Tomonaga-Luttinger Liquid of Loop and Josephson Junction Geometries
Creators: name: Takane, Yositake
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The local density of states (LDOS) in a one-dimensional helical channel of finite length is studied within a Tomonaga-Luttinger model at zero temperature. Two particular cases of loop and Josephson junction geometries are considered. The LDOS, as a function of energy $ω$ measured from the Fermi level, consists of equally spaced spikes of the $δ$-function type, and electron-electron interactions modify their relative height. It is shown that, in the loop geometry, the height of spikes decreases as $ω\to 0$ everywhere in the system. It is also shown that, in the Josephson junction, the behavior of the LDOS significantly depends on the spatial position. At the end points of the junction, the height increases as $ω\to 0$ and its variation is more pronounced than that in the loop case. Away from the end points, the height of spikes shows a non-monotonic $ω$-dependence, which disappears in the long-junction limit.
description: 7 pages, 6 figures
Re-thinking urban infrastructures as spaces of learning
Creators: name: Tuitjer, Leonie
name: Müller, Anna‐Lisa
Publisher: name: Oxford : Wiley-Blackwell
Year: 2020
Subjects: subject: learning
subject: refugees
subject: smart city
subject: urban infrastructure
subject: Dewey Decimal Classification::900 | Geschichte und Geografie::910 | Geografie, Reisen

description: Research on urban infrastructure has advanced to the forefront of human geography inquiry in the last two decades. Among other topics, geographers have looked into the privatization and neo-liberal splintering of urban infrastructures; the failings of infrastructures and the power relations revealed within these failings; the political ecology of infrastructural provisions; the specific infrastructural challenges of cities within the so-called Global South; and the entanglements of everyday experiences, affects and emotions with infrastructures. Yet, little attention has been drawn to the ways in which infrastructures need to be learned to fulfil their role of smoothly providing people with diverse services. Given the increasing spatial mobility of populations (e.g., as refugees, migrants, expatriates, and tourists), as well as the accelerating pace of infrastructural change (e.g., in the name of Smart City developments) however, it has become more salient than ever to open-up urban infrastructural research more explicitly towards critical inquiries of learning. Thus, this paper proposes to re-think urban infrastructures not only as socio-material configurations, but more specifically as important spaces for learning.
Evaluating the Performance of IPTV over Fixed WiMAX
Creators: name: Hamodi, Jamil
name: Salah, Khaled
name: Thool, Ravindra
Publisher: name: arXiv
Year: 2013
Subjects: subject: Multimedia (cs.MM)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: IEEE specifies different modulation techniques for WiMAX; namely, BPSK, QPSK, 16 QAM and 64 QAM. This paper studies the performance of Internet Protocol Television (IPTV) over Fixed WiMAX system considering different combinations of digital modulation. The performance is studied taking into account a number of key system parameters which include the variation in the video coding, path-loss, scheduling service classes different rated codes in FEC channel coding. The performance study was conducted using OPNET simulation. The performance is studied in terms of packet lost, packet jitter delay, end-to-end delay, and network throughput. Simulation results show that higher order modulation and coding schemes (namely, 16 QAM and 64 QAM) yield better performance than that of QPSK.
description: 9 Pages, 9 Figures. arXiv admin note: substantial text overlap with other internet sources by other authors
The role of thermal disorder for magnetism and the $α- γ$ transition in Cerium; Results from density-functional theory
Creators: name: Jarlborg, T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic structures of fcc Ce are calculated for large supercells with varying disorder by use of density-functional theory. Thermal disorder induces fluctuations of the amplitude of the magnetic moments and an increase the average moments in the high-volume phase. The ferro-magnetic solutions move towards lower volume than in calculations for the perfectly ordered lattice. Therefore, disorder contributes via entropy to the stabilization of the $γ$ phase at high $T$, and it is important for an understanding of the $α-γ$ transition. Core level spectroscopy would be a mean to detect disorder through the spread of Madelung shifts and local exchange splittings.
description: 5 pages, 4 figures
Influence of the hyperfine structure on plutonium in resonant laser-SNMS
Creators: name: Bosco, Hauke
name: Weiss, Martin
name: Raiwa, Manuel
name: Walther, Clemens
name: Kneip, Nina
name: Wendt, Klaus
Publisher: name: Dordrecht [u.a.] : Springer Science + Business Media B.V
Year: 2020
Subjects: subject: Isotope ratio
subject: Laser beam polarization
subject: Plutonium
subject: Resonance ionization
subject: SNMS
subject: Trace analysis
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Resonance ionization mass spectrometry is an ultra-sensitive and highly element selective tool for spectroscopy, ionization and detection of atoms and thus enables rare isotope determination. In combination with spatially resolved sputtering of neutrals by an initial ion beam, e.g. within a commercial secondary ion mass spectrometer, an isotope and isobar selective analysis technique with resolution on the micrometer scale for particles and surfaces is realized. Detection of minuscule amounts of specific actinides, e.g. of plutonium, in environmental and technical samples by this ultra-trace analysis technique requires detailed knowledge about the atomic physics of the element. Identification and characterization of the specific resonance ionization scheme applied within the particular geometry of the apparatus in use is needed. An analysis of the dependence of the specifications, specifically regarding the influence of the relative laser beam polarizations is presented here as an aspect, that could have a severe impact on isotope ratio precision and overall efficiency in the resulting ion signal.
Origen de la laguna costera de Punta Banda /
Creators: name: Cruz Blancas, Ezequiel
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: Oceanologia||Geologia||Tesis
subject: QE203 .B34 C78 1985

description: Debido a la posible planeación de desarrollos turísticos y a la eminente construcción de infraestructura de La Laguna Costera de Punta Banda, se hace necesario conocer los procesos geológicos y oceanográficos que motivaron las condiciones requeridas para la formación de este cuerpo de agua.
title: Rethinking the West
title: Promise and Crisis of a Concept
titleType: Subtitle
Creators: name: Childs, Matthew
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2023
Subjects: subject: 810 American literature in English
subject: 830 German literature and literatures of related languages
subject: 890 Literatures of other specific languages and language families

description: Dieser Artikel baut auf einen kürzeren Beitrag über die Konferenz "Den Westen neu denken: Promise and Crisis of a Concept" auf, die am 15. Dezember 2022 an der Universität Münster stattfand. Zusätzlich zu den erweiterten Abschnitten, deren Elemente denen der vorherigen Fassung gleichen, enthält dieser Text eine Reflexion über das Thema des Westens aus meiner Perspektive als Amerikaner, der in einem transatlantischen Kontext arbeitet und forscht, nämlich als Teilnehmer eines internationalen akademischen Austauschprogramms zwischen dem Fachbereich Germanistik der University of Washington und dem Germanistischen Institut der Universität Münster.
description: This essay corresponds to and builds upon a shorter piece regarding the conference "Rethinking the West: Promise and Crisis of a Concept" that took place on December 15, 2022, at the University of Münster. In addition to expanded sections, elements of which are the same or similar to those found in the previous iteration, this text includes a reflection on the theme of the West from my perspective as an American working and researching in a transatlantic context, namely as a participant in an international graduate student exchange between the University of Washington’s Department of German Studies and the University of Münster's Germanistisches Institut.
The formation heights of coronal shocks from 2D density and Alfvén speed maps
Creators: name: Zucca, Pietro
name: Carley, Eoin P.
name: Bloomfield, D. Shaun
name: Gallagher, Peter T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Super-Alfvénic shock waves associated with coronal mass ejections (CMEs) can produce radio emission known as Type II bursts. In the absence of direct imaging, accurate estimates of coronal electron densities, magnetic field strengths and Alfvén speeds are required in order to calculate the kinematics of shocks. To date, 1D radial models have been used, but these are not appropriate for shocks propagating in non-radial directions. Here, we study a coronal shock wave associated with a CME and Type II radio burst using 2D electron density and Alfvén speed maps to determine the locations that shocks are excited as the CME expands through the corona. Coronal density maps were obtained from emission measures derived from the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamic Observatory (SDO) and polarized brightness measurements from the Large Angle and Spectrometric Coronagraph (LASCO) on board the Solar and Heliospheric Observatory (SOHO). Alfvén speed maps were calculated using these density maps and magnetic field extrapolations from the Helioseismic and Magnetic Imager (SDO/HMI). The computed density and Alfvén speed maps were then used to calculate the shock kinematics in non-radial directions. Using the kinematics of the Type II burst and associated shock, we find our observations to be consistent with the formation of a shock located at the CME flanks where the Alfvén speed has a local minimum. 1D density models are not appropriate for shocks that propagate non-radially along the flanks of a CME. Rather, the 2D density, magnetic field and Alfvén speed maps described here give a more accurate method for determining the fundamental properties of shocks and their relation to CMEs.
Force-Balance Analysis of Stress Changes During the Subduction-Collision Transition and Implications for the Rise of Mountain Belts
Creators: name: Dielforder, A.
name: Hampel, A.
Publisher: name: Hoboken, NJ : Wiley
Year: 2021
Subjects: subject: force balance
subject: megathrust
subject: mountain building
subject: orogenesis
subject: subduction-collision transition
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: Mountain height at convergent plate margins is limited by the megathrust shear force, but it remains unclear how this constraint affects the topographic evolution and mountain building at the transition from subduction to collision. Generally, mountain height increases during the subduction-collision transition in response to crustal thickening or processes like mantle delamination and slab breakoff, but the main parameters controlling how much mountain height increases remain poorly understood. Here we show, based on analytical and finite-element force-balance models, that the increase in mountain height depends on the magnitude of the megathrust shear force and the reduction of submarine margin relief. During the subduction stage, the shear force is balanced by the gravitational effect of the margin relief and the deviatoric stresses in the upper plate are low. When the submarine margin relief is reduced during the closure of the ocean basin, the effect of the gravitational force decreases and the upper plate experiences enhanced deviatoric compression, which allows the mountain height to increase until a near-neutral stress state beneath the high mountains is restored. If the increase in mountain height cannot keep pace with the submarine relief reduction, the compression of the upper plate increases by a few tens of MPa, which promotes tectonic shortening and mountain building. Our analysis implies that mountain height can increase by hundreds of meters to a few kilometers during collision, depending primarily on the trench depth during the subduction stage and possible syncollisional changes of the megathrust shear force.
Piloting the adaptation of the methodology of Forest Fire Potential Polygons to improve decision making on EWE events
Creators: name: (Alphabetical Order) Arilla, Etel; Castellarnau, Xavier; Castellnou, Marc; Castellví, Jordi; Cespedes, Jose; Estivill, Laia; Ferragut, Aniol; Larrañaga, Asier; Miralles, Marta; Nebot, Edgar; Pagès, Jordi; Pallàs, Pepe; Rosell, Martí; Ruiz, Borja.
Publisher: name: Zenodo
Year: 2023
Subjects: polygons of fire potential, decision-making, extreme wildfire events

description: Fire potential polygons allow uncertainties in the decision-making process to be considered in a traceable and credible way. Fire potential polygons are a specific type of potential polygons that fit into a broader analysis that uses deconstruction, iteration and fractality. They are sized seeing changes in fire behaviour and opportunities for fire suppression efforts. The grouping of polygons and flows allows the identification of different scenarios of resolution. The adaptation of the methodology to Extreme Wildfire Events includes the extreme scenario from the beginning of the process by defining the expected scenario and considering its scales and behaviour.
Formation of Igneous Layering in the Lower Oceanic Crust From the Samail Ophiolite, Sultanate of Oman
Creators: name: Mock, D.
name: Neave, D.A.
name: Müller, S.
name: Garbe‐Schönberg, D.
name: Namur, O.
name: Ildefonse, B.
name: Koepke, J.
Publisher: name: Hoboken, NJ : Wiley
Year: 2020
Subjects: subject: cooling rates
subject: formation of layered gabbros
subject: lower oceanic crust
subject: Oman ophiolite
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: As the largest and best exposed example of paleo fast-spreading oceanic crust on land, the Samail ophiolite in the Sultanate of Oman represents an ideal natural laboratory for investigating deep crustal processes at fast-spreading mid-ocean ridges. We studied two layered gabbro sequences from different stratigraphic depths: one from the middle of the plutonic crust showing decimeter-scale modal layering (i.e., varying phase proportions) with olivine abundances gradually decreasing from layer bases to tops (Wadi Somerah, Sumail block) and one located near the crust-mantle boundary showing millimeter-scale olivine-rich layers (Wadi Wariyah, Wadi Tayin block). Our multimethod approach of field, petrographic, geochemical, and microstructural observations focuses on documenting layered textures that are widely observed within the lower oceanic crust as well as understanding their formation mechanisms within the context of small scale crustal accretion processes beneath fast-spreading mid-ocean ridges. Results from the mid-crustal sequence indicate moderate cooling rates (Ca-in-olivine: log[dT/dt; °C yr−1] = −2.21 ± 0.7) and correlated variations in mineral compositions and microstructures. We infer that decimeter-scale layers in Wadi Somerah were deposited by density currents of crystal-laden magma within a sill environment that potentially experienced occasional magma replenishment. The millimeter layering in Wadi Wariyah is best explained by Ostwald ripening emphasizing initial heterogeneities possibly being provoked by cyclical nucleation of olivine through the competing effects of element diffusion and rapid cooling. Fast cooling is recorded for the crustal base (Ca-in-olivine: log[dT/dt; °C yr−1] = −1.19 ± 0.5, Mg-in-plagioclase: log[dT/dt; °C yr−1] = −1.35°C ± 0.6) demonstrating that heat locally can be lost very efficiently from the lowermost crust.
Surface tension of isotropic-nematic interfaces: Fundamental Measure Theory for hard spherocylinders
Creators: name: Wittmann, René
name: Mecke, Klaus
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A fluid constituted of hard spherocylinders is studied using a density functional theory for non-spherical hard particles, which can be written as a function of weighted densities. This is based on an extended deconvolution of the Mayer $f$-function for arbitrarily shaped convex hard bodies in tensorial weight functions, which depend each only on the shape and orientation of a single particle. In the course of an examination of the isotropic- nematic interface at coexistence the functional is applied to anisotropic and inhomogeneous problems for the first time. We find good qualitative agreement with other theoretical predictions and also with Monte-Carlo simulations.
Mean-field analysis of ground state and low-lying electric dipole strength in $^{22}$C
Creators: name: Inakura, Tsunenori
name: Horiuchi, W.
name: Suzuki, Y.
name: Nakatsukasa, T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Properties of neutron-rich $^{22}$C are studied using the mean-field approach with Skyrme energy density functionals. Its weak binding and large total reaction cross section, which are suggested by recent experiments, are simulated by modifying the central part of Skyrme potential. Calculating $E1$ strength distribution by using the random-phase approximation, we investigate developments of low-lying electric dipole ($E1$) strength and a contribution of core excitations of $^{20}$C. As the neutron Fermi level approaches the zero energy threshold ($\varepsilon_F >\sim -1$ MeV), we find that the low-lying $E1$ strength exceeds the energy-weighted cluster sum rule, which indicates an importance of the core excitations with the $1d_{5/2}$ orbit.
A tunable anthranilate-inducible gene expression system for Pseudomonas species
Creators: name: Hoffmann, Lena
name: Sugue, Michael-Frederick
name: Brüser, Thomas
Publisher: name: Berlin ; Heidelberg ; New York : Springer
Year: 2020
Subjects: subject: Anthranilate
subject: Gene regulation
subject: Pseudomonas aeruginosa
subject: Pseudomonas fluorescens
subject: Recombinant expression
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: Pseudomonads are among the most common bacteria in soils, limnic ecosystems, and human, animal, or plant host environments, including intensively studied species such as Pseudomonas aeruginosa, P. putida, or P. fluorescens. Various gene expression systems are established for some species, but there is still a need for a simple system that is suitable for a wide range of pseudomonads and that can be used for physiological applications, i.e., with a tuning capacity at lower expression levels. Here, we report the establishment of the anthranilate-dependent PantA promoter for tunable gene expression in pseudomonads. During studies on P. fluorescens, we constructed an anthranilate-inducible AntR/PantA-based expression system, named pUCP20-ANT, and used GFP as reporter to analyze gene expression. This system was compared with the rhamnose-inducible RhaSR/PrhaB-based expression system in an otherwise identical vector background. While the rhamnose-inducible system did not respond to lower inducer concentrations and always reached high levels over time when induced, expression levels of the pUCP20-ANT system could be adjusted to a range of distinct lower or higher levels by variation of anthranilate concentrations in the medium. Importantly, the anthranilate-inducible expression system worked also in strains of P. aeruginosa and P. putida and therefore will be most likely useful for physiological and biotechnological purposes in a wide range of pseudomonads.
The role of plant physiology and cultivar of chrysanthemum in the resistance against Western flower thrips
Creators: name: Rogge, Sina Alexandra
name: Meyhöfer, Rainer
Publisher: name: Oxford [u.a.] : Wiley-Blackwell
Year: 2021
Subjects: subject: Asteraceae
subject: chrysanthemum resistance
subject: Dualex Scientific 4 sensor
subject: flower color
subject: flower shape
subject: Frankliniella occidentalis
subject: relative flavonol contents
subject: resistance screening
subject: silver damage
subject: Thripidae
subject: Thysanoptera
subject: Western flower thrips
subject: Dewey Decimal Classification::500 | Naturwissenschaften::590 | Tiere (Zoologie)

description: Western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), is an economically important pest insect in vegetable and ornamental cultivation worldwide. Little is known about host plant resistance in the vegetative and generative phases of chrysanthemum [Chrysanthemum × morifolium (Ramat.) Hemsl. (Asteraceae)] and the role of resistance factors such as flavonols, flower color, and flower shape. We screened a broad range of chrysanthemum cultivars across two seasons to quantify resistance against Western flower thrips. Resistance was based on silver damage on the leaves, and relative flavonol content was measured using a Dualex Scientific 4 hand-held sensor. There was significant variation in silver damage between cultivars, indicating different levels of resistance. There was no correlation between the relative flavonol content in middle leaves and plant silver damage. A clearer resistance level discrimination by flavonols in resistant and susceptible cultivars would be possible in the future by comparing multiple leaf positions during the ontogenetic phases of plant development. Moreover, the influence of flower color and shape on resistance to thrips was investigated by counting the adult thrips and larvae on flowers. The results showed significant differences in flower color preference by adults, but not by larvae. Flower shape influenced thrips larvae and females, but not males. The importance of the results for resistance determination is discussed.
Modeling of Symbiotic Bacterial Biofilm Growth with an Example of the Streptococcus–Veillonella sp. System
Creators: name: Feng, Dianlei
name: Neuweiler, Insa
name: Nogueira, Regina
name: Nackenhorst, Udo
Publisher: name: New York, NY ; Berlin ; Heidelberg [u.a.] : Springer
Year: 2021
Subjects: subject: Biofilm model
subject: Heterogeneous distribution
subject: Numerical simulation
subject: Streptococcus–Veillonella
subject: Symbiotic system
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: We present a multi-dimensional continuum mathematical model for modeling the growth of a symbiotic biofilm system. We take a dual-species namely, the Streptococcus–Veillonella sp. biofilm system as an example for numerical investigations. The presented model describes both the cooperation and competition between these species of bacteria. The coupled partial differential equations are solved by using an integrative finite element numerical strategy. Numerical examples are carried out for studying the evolution and distribution of the bio-components. The results demonstrate that the presented model is capable of describing the symbiotic behavior of the biofilm system. However, homogenized numerical solutions are observed locally. To study the homogenization behavior of the model, numerical investigations regarding on how random initial biomass distribution influences the homogenization process are carried out. We found that a smaller correlation length of the initial biomass distribution leads to faster homogenization of the solution globally, however, shows more fluctuated biomass profiles along the biofilm thickness direction. More realistic scenarios with bacteria in patches are also investigated numerically in this study.
The algebra of two dimensional generalized Chebyshev - Koornwinder oscillator
Creators: name: Borzov, V. V.
name: Damaskinsky, E. V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 33C45, 81R10

description: In the previous works \cite{N46,N47} authors have defined the oscillator-like system that associated with the two variable Chebyshev-Koornwinder polynomials. We call this system the generalized Chebyshev - Koornwinder oscillator. In this paper we study the properties of infinite-dimensional Lie algebra that is analogous to the Heisenberg algebra for the Chebyshev - Koornwinder oscillator. We construct the exact irreducible representation of this algebra in a Hilbert space $\mathcal{H}$ of functions that are defined on a region which bounded by the Steiner hypocycloid. The functions are square-integrable with respect to the orthogonality measure for the Chebyshev - Koornwinder polynomials and these polynomials form an orthonormalized basis in the space $\mathcal{H}$. The generalized oscillator which is studied in the work can be considered as the simplest nontrivial example of multiboson quantum system that is composed of three interacting oscillators.
description: 27 pages, 3 figures, submited
An efficient optimization approach for designing machine learning models based on genetic algorithm
Creators: name: Hamdia, Khader M.
name: Zhuang, Xiaoying
name: Rabczuk, Timon
Publisher: name: London : Springer
Year: 2021
Subjects: subject: Deep neural networks
subject: Fracture energy
subject: Genetic algorithm
subject: Machine learning
subject: Optimization
subject: Polymer nanocomposites
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: Machine learning (ML) methods have shown powerful performance in different application. Nonetheless, designing ML models remains a challenge and requires further research as most procedures adopt a trial and error strategy. In this study, we present a methodology to optimize the architecture and the feature configurations of ML models considering a supervised learning process. The proposed approach employs genetic algorithm (GA)-based integer-valued optimization for two ML models, namely deep neural networks (DNN) and adaptive neuro-fuzzy inference system (ANFIS). The selected variables in the DNN optimization problems are the number of hidden layers, their number of neurons and their activation function, while the type and the number of membership functions are the design variables in the ANFIS optimization problem. The mean squared error (MSE) between the predictions and the target outputs is minimized as the optimization fitness function. The proposed scheme is validated through a case study of computational material design. We apply the method to predict the fracture energy of polymer/nanoparticles composites (PNCs) with a database gathered from the literature. The optimized DNN model shows superior prediction accuracy compared to the classical one-hidden layer network. Also, it outperforms ANFIS with significantly lower number of generations in GA. The proposed method can be easily extended to optimize similar architecture properties of ML models in various complex systems.
Identifying insulating states of ultra cold atoms with cavity transmission spectrum
Creators: name: Lugani, Jasleen
name: Thyagarajan, K.
name: Ghosh, Sankalpa
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: In this paper, we consider the transmission characteristics of an optical cavity loaded with ultra cold atoms in a one dimensional optical lattice at absolute zero temperature. In particular, we consider the situation when the many body quantum state of the ultra cold atoms is an insulating state with fixed number of atoms at each site, which can be either density wave (DW) or Mott insulator (MI) phase, each showing different type of discrete lattice translational symmetry. We provide a general framework of understanding the transmission spectrum from a single and two cavities/modes loaded with such insulating phases. Further, we also discuss how such a transmission spectrum changes when these insulating phases make a cross over to the superfluid (SF) phase with the changing depth of the optical lattice potential.
description: PDFlatex, 10 .pdf figures (minor spelling correction in the title only)
A curing model for the numerical simulation within additive manufacturing of soft polymers using peridynamics
Creators: name: Hartmann, Philipp
name: Weißenfels, Christian
name: Wriggers, Peter
Publisher: name: Berlin ; Heidelberg [u.a.] : Springer
Year: 2020
Subjects: subject: Additive manufacturing
subject: Curing
subject: Local–non-local coupling
subject: Meshfree methods
subject: Multiphysics
subject: Peridynamics
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: Within this paper, the modelling and simulation of extrusion-based Additive Manufacturing (AM) processes of curing polymers is presented. The challenge of the AM is the adjustment of processing parameters. This includes the application of laser radiation to locally accelerate the curing in order to control the final geometry of the implant. Since complex multi-physical coupling effects are hardly predictable by operator experience, numerical simulations are beneficial. When the underlying physical effects of the AM processes are captured correctly within the simulations, a realistic representation of the process is possible. To model the material behaviour during the process, a process-dependent large strain curing model is formulated, considering the stress free curing behaviour of the material. State-of-the-art models are not able to model the fluid-like behaviour of low cured polymers. This needs a formulation that takes into account finite deformations. Hence, the current model is extended to finite plasticity using a process-dependent yield function. This allows the modelling of material spreading in the fluid-like state by simultaneously reducing the accumulation of elastic stored energy, which would lead to an unintentional and non-physical bounce-off behaviour otherwise. For the numerical simulations, an enhanced version of the peridynamic correspondence formulation using fractional subfamilies with associated volume weighting factors is introduced and implemented. Besides the specific laser modelling as a volumetric heat source, a local–non-local coupling of the arising thermo-chemo-mechanical coupled equations is introduced within the peridynamic framework. Within the simulations, the applicability of the plasticity-based approach to model material spreading in the fluid-like state is presented. Finally, the software for extrusion-based printing processes is developed and the complete thermo-chemo-mechanical coupled AM process is simulated. It is shown that higher geometrical precision is obtainable in terms of a reduced material spreading by the application of a laser radiation. The model constitutes the first step of the virtual implant development regarding the optimisation possibilities during the AM process.
An open-source tool for water, energy and waste management integrated assessment
Creators: name: Oliveira, Miguel Castro
name: Iten, Muriel
name: Matos, Henrique A.
Publisher: name: Zenodo
Year: 2022

description: Water and energy integration systems (WEIS) in process industry plants consists in the exploitation of possible interdependencies between partial or full existing industrial processes. The WEIS overall aim is to promote energy efficiency, water efficiency and pollutant emission mitigation simultaneously through waste heat recovery (WHR), thermal energy storage (TES) and heat-driven wastewater treatment [1–3]. This work introduces an innovative simulation and optimisation tool for water, energy and waste management strategies assessment in industrial processes. This tool is primarily developed in Modelica language also adapting a part of ThermoPower library [4]. It is divided in the following modules:
 • Heat recovery module (including combustion-based processes of industrial processes industry and WRH technologies);
 • Thermal energy storage (sensible and latent TES units);
 • Water treatment (water-using processes and heat-driven wastewater treatment units) and;
 • Wastewater-to-energy (sustainable fuel production technologies from wastewater).
Overconsumption, outflows and the quenching of satellite galaxies
Creators: name: McGee, Sean L.
name: Bower, Richard G.
name: Balogh, Michael L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The baryon cycle of galaxies is a dynamic process involving the intake, consumption and ejection of vast quantities of gas. In contrast, the conventional picture of satellite galaxies has them methodically turning a large gas reservoir into stars until this reservoir is forcibly removed due to external ram pressure. This picture needs revision. Our modern understanding of the baryon cycle suggests that in some regimes the simple interruption of the fresh gas supply may quench satellite galaxies long before stripping events occur, a process we call overconsumption. We compile measurements from the literature of observed satellite quenching times at a range of redshifts to determine if satellites are principally quenched through orbit-based gas stripping events -- either direct stripping of the disk (ram pressure stripping) or the extended gas halo (strangulation) -- or from internally-driven star formation outflows via overconsumption. The observed timescales show significant deviation from the evolution expected for gas stripping mechanisms and suggest that either ram pressure stripping is much more efficient at high redshift, or that secular outflows quench satellites before orbit-based stripping occurs. Given the strong redshift evolution of star formation rates, at high redshift (z > 1.5) even moderate outflow rates will lead to extremely short quenching times with the expectation that such satellites will be quenched almost immediately following the cessation of cosmological inflow, regardless of stripping events. Observations of high redshift satellites give an indirect but sensitive measure of the outflow rate with current measurements suggesting that outflows are no larger than 2.5 times the star formation rate for galaxies with a stellar mass of 10^{10.5} solar masses.
description: MNRAS Letters, in press. 6 pages, 2 figures
Additional file 11 of Genome-scale CRISPR screening at high sensitivity with an empirically designed sgRNA library
Creators: name: Henkel, Luisa
name: Rauscher, Benedikt
name: Schmitt, Barbara
name: Winter, Jan
name: Boutros, Michael
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 11: Figure S6. Hit detection in screens with the HD CRISPR library. (A) Number of hits determined using BAGEL [32] at a strict Bayes factor cutoff (BF > 6) in different screens conducted with the HD CRISPR library. (B) Number of essential genes determined using MAGeCK RRA [42] at 5% FDR in different screens conducted with the HD CRISPR library. (C) Number of essential genes determined using gscreend [43] at 5% FDR in different screens conducted with the HD CRISPR library. (D) Venn diagrams showing the overlap between essential genes determined using either BAGEL or MAGeCK RRA for each screen.
Closing the loop through water and heat valorisation in industrial processes – A circular economy approach
Creators: name: Iten, Muriel
name: Oliveira, Miguel Castro
name: Matos, Henrique A.
Publisher: name: Zenodo
Year: 2022

description: Water and heat integration in process industry may consider hydrogen production through water valorisation and waste heat recovery. Overall, energy processes produce waste that may be reused for primary fuel savings (e.g. natural gas), for instance, in combustion-based processes. While process water waste can be valorised to electrolysis units. Combined savings are achieved by the production of hydrogen-enriched natural gas (HENG). With the installation of thermodynamic cycles (i.e., Organic Rankine Cycle -ORC), additional electricity may be generated. This work presents an integrated heat recovery and electrolysis system, via ORC, in a process industry plant. A customised simulation model has been developed in Modelica language and OpenModelica environment. The conceptualized system incorporates water and heat stream recirculation from a set of processes aiming to promote a closed-loop operation of the overall industrial processes, aiming a circular economy perspective.
A Mobility Case Study for Validating Attack Propagation Analyses
Creators: name: Evli, Yakup Ensar
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2022

description: The Architectural Attack Propagation Analysis for Identifying Confidentiality Issues proposed by Walter et al. considers vulnerability analysis in software architecture. The analysis is using access control policies together with the vulnerabilities and their combinations to propagate through the system. This phenomenon has to be investigated thoroughly in a real-life context to be able to make conclusions about metrics, e.g. accuracy. However, a concrete approach to achieve the investigation of Attack Propagation Analyses in a real-life context is missing. This work aims to fill this gap with A Mobility Case Study for Validating Attack Propagation Analyses. In order to achieve validity, conventional properties of case studies in software engineering were identified. Afterward, the end result, in form of a software model, was reviewed according to these properties. This review has revealed that all properties were fulfilled, however not in the highest degree of fulfillment. A discussion about this is held in this paper.
title: En Route to European Journals of Inorganic and Organic Chemistry
Creators: name: Engberts, Jan B. F. N.
name: Hafner, Klaus
name: Hopf, Henning
Publisher: name: Wiley-VCH
Year: 2022

description: In 1997 a new journal structure for the chemical literature in Europe will begin to evolve. Recueil des Travaux Chimiques des Pays-Bas will unite with Liebigs Annalen and Chemische Berichte; furthermore, Chemistry - A European Journal will become independent of Angewandte Chemie, its “carrier journal”. Recueil was founded in 1882 and is the journal of the Royal Netherlands Chemical Society (KNCV); Chemische Berichte (1865) and Liebigs Annalen (1832) are German Chemical Society (GDCh) journals. With these heritages in mind, we will apply the image of a “European House”, often used by politicians, to scientific publishing in Europe.
RDM Lecture: Data Storage and Sharing
Creators: name: Briney, Kristin
Publisher: name: Zenodo
Year: 2022
Subjects: data sharing
research data management

description: Presentation on Research Data Management for Caltech's Fall 2022 Data Analysis in the Biological Sciences (BE/Bi 103) course. Adapted from Tom Morrell's lecture slides from Fall 2021: https://doi.org/10.5281/zenodo.5565508
description: {"references": ["https://doi.org/10.5281/zenodo.5565508"]}
¿Vida social en bacterias? Sociomicrobiología
Creators: name: Morales-Luis, Benjamin
Publisher: name: Zenodo
Year: 2023
Subjects: Sociomicrobiología; Quorum sensing; biofilm

description: RESUMEN Tradicionalmente se pensaba que las bacterias eran organismos unicelulares y solitarios, se ha descubierto que tienen la capacidad de interactuar y formar comunidades complejas que dio a pie a la sociomicrobiología. Una de las formas más comunes de interacción social en bacterias es a través de la comunicación celular, conocida como quorum sensing [1]. En este proceso, las bacterias liberan y detectan moléculas de señalización, llamadas autoinductores, que les permiten comunicarse entre sí y coordinar actividades colectivas [2]. El quorum sensing puede regular una amplia variedad de comportamientos sociales, como la formación de biofilm, la producción de metabolitos secundarios y la virulencia [3, 4].
description: {"references": ["Kyle LA, Martin S. Social interactions in bacterial cell\u2013cell signaling, FEMS Microbiology Reviews, 2017; 41(1): 92\u2013107, Disponible en: https://doi.org/10.1093/femsre/fuw038", "Windsor WJ. How Quorum Sensing Works. ASM.org. 2020. ASM.org. Disponible en: https://asm.org/Articles/2020/June/How-Quorum-Sensing-Works", "Greenberg EP. The new science of sociomicrobiology and the realm of synthetic and systems ecology. In: Institute of Medicine (US) Forum on Microbial Threats. The Science and Applications of Synthetic and Systems Biology: Workshop Summary. Washington (DC): National Academies Press (US); 2011. A7. Disponible en: https://www.ncbi.nlm.nih.gov/books/NBK84461/", "Pag\u00e1n On\u00e9 R. The brain: a concept in fluxPhil. Trans. R. Soc. 2019; B3742018038320180383. Disponible en: http://doi.org/10.1098/rstb.2018.0383"]}
Additional file 12 of Genome-scale CRISPR screening at high sensitivity with an empirically designed sgRNA library
Creators: name: Henkel, Luisa
name: Rauscher, Benedikt
name: Schmitt, Barbara
name: Winter, Jan
name: Boutros, Michael
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 12: Figure S7. Essential genes are highly consistent between HAP1 Cas9 bulk population and single cell clones. A) Venn diagram showing essential gene overlap between a HAP1 bulk Cas9 population and two single cell clones that were selected for high Cas9 activity. Gene essentiality was determined using BAGEL with a Bayes Factor cutoff of 6 (see [17]). The combined HD CRISPR library with 8 sgRNAs per gene was used for essential gene inference. (B) Quantitative comparison of BAGEL Bayes Factors for each gene between the HAP1 bulk Cas9 population and selected single cell clones SCC11 and SCC12. Each dot represents a gene in the HD CRISPR library. Red dots indicate essential genes that are private to a single cell clone. The dashed diagonal is the identity line. (C) Venn diagram (left) and scatter plots (middle and right) showing essential gene overlap between a HAP1 bulk Cas9 population and two single cell clones in screens using the HD CRISPR sub-library A. (D) Venn diagram (left) and scatter plots (middle and right) showing essential gene overlap between a HAP1 bulk Cas9 population and two single cell clones in screens using the HD CRISPR sub-library A.
What does a billion-year old technological species… do?
Creators: name: Sheikh, Sofia Z.
name: Gentile, Rhett
Publisher: name: Zenodo
Year: 2023
Subjects: SETI
Technosignatures

description: Any technological species that we successfully detect in a SETI search will likely be older than humanity by several orders-of-magnitude. Therefore, it is necessary to imagine how such a species would interact with the universe around it to determine the kinds of technosignatures that we should be searching for. However, given the difficulty of forecasting humanity’s future, technologically or otherwise, on even decades-long timescales, predicting the specifics of such long-timescale behaviour in an extraterrestrial species is challenging at best and perhaps impossible at worst. In this poster, we attempt a new framing for far-future behavior by zooming out as much as possible: generalizing common actions and uses of life, technology, and economy and thinking about their physical impacts and counterfactuals.
description: {"references": ["Kipping, D., Frank, A., and Scharf, C., IJA, 19 (6), pp. 430\u2013437, 2020.", "Sagan, C., Pale blue dot: a vision of the human future in space,1994.", "Profitiliotis, G., Assembly of the Order of the Octopus, 2021.", "Tirard, Morange, and Lazcano, Astrobiology, 10(10), pp. 1003-1009, 2010.", "Shumaker, Walkup, and Beck. 2011."]}