cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Functions of Ornithine Decarboxylase (ODC) in Mouse Ovaries During Development and Reproduction
Creators: name: Lowther, Jenna
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: subject: Polyamines
subject: Reproduction
subject: FOS: Medical biotechnology
subject: Biochemistry

description: In 1971 it was discovered by Kobayashi et al that ovarian activity of ornithine decarboxylase (ODC), the rate-limiting step of the polyamine pathway, increased just prior to ovulation in rats. Following the discovery in rats, this phenomenon of ovarian ODC activity increase was seen in several other mammal species, such as mice and pigs. However, despite this discovery occurring fifty years ago the purpose and function of this activity increase are still unknown. One factor of Odc which complicates studies is that whole-body knockouts have been found to be embryonic lethal, with the embryos not making it past embryonic day 3.5. In 2013 our lab found that older mice experienced a smaller ovarian ODC activity increase when compared to their younger counterparts. This decrease in ODC activity corresponded with the increase in reproductive complications typically seen in older mice, such as an increase in miscarriage, and an increased rate of aneuploidies. Furthermore, supplementing the drinking water of these old mice with putrescine, the product of ODC, was found to partially rescue some of these old-age symptoms, such as the rate of miscarriage. In order to further study the purpose of the ovarian ODC rise during the preovulatory period we have generated mice that have had Odc knocked out (Odc-KO) specifically in the oocytes, or in the granulosa cells. Double knockout mice which had Odc knocked out in both the oocytes and granulosa cells were also generated. With these tissue-specific Odc-KO mice, it was hypothesized that a lack of Odc in the oocytes or granulosa cells would negatively impact the follicular development and fertility of the mice. From the oocyte-specific Odc- KO mice we were able to demonstrate that Odc expression in the oocyte is not required for oogenesis. Knocking out Odc in the oocytes was found to have no effect on the development of the oocyte or the surrounding follicle and, no impact was seen on the fertility of the oocyte-specific Odc-KO mice when compared to wild-type controls. The granulosa cell-specific Odc-KO was found to only be a partial knockout. Due to this, the full effects of knocking out Odc in the granulosa cells remain inconclusive. More research is required to find a more reliable method of knocking out genes in the granulosa cells in order to study this further. Additionally, more work on the inhibition of gap junctions to prevent the transmission of polyamines throughout the follicle is required to better understand the effects of Odc expression and polyamines on reproduction.
Zeichnungen und Radierungen von Rembrandt
Creators: name: Trautscholdt, Eduard
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 10 Nr. 6 (1957): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
A hybrid superconductor-normal metal electron trap as a photon detector
Creators: name: Lotkhov, S. V.
name: Zorin, A. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A single-electron trap built with two Superconductor (S) - Insulator (I) - Normal (N) metal tunnel junctions and coupled to a readout SINIS-type single-electron transistor A (SET A) was studied in a photon detection regime. As a source of photon irradiation, we used an operating second SINIS-type SET B positioned in the vicinity of the trap. In the experiment, the average hold time of the trap was found to be critically dependent on the voltage across SET B. Starting in a certain voltage range, a photon-assisted electron escape was observed at a rate roughly proportional to the emission rate of the photons with energies exceeding the superconducting gap of S-electrodes in the trap. The discussed mechanism of photon emission and detection is of interest for low-temperature noise spectrometry and it can be of relevance for the ampere standard based on hybrid SINIS turnstiles.
description: submitted, 3 pages, 3 figures
Global Two-Fluid Simulations Of Magnetic Reconnection
Creators: name: Murphy, Nicholas A.
name: Sovinec, Carl R.
Publisher: name: Zenodo
Year: 2007
Subjects: magnetic reconnection

description: Two-fluid effects are known to influence the magnetic reconnection process through non-MHD communication between the reconnection layer and surrounding magnetic field topology.1 To examine the interrelationship between the local reconnection physics and the global magnetic field geometry, we perform two-fluid simulations of the Magnetic Reconnection Experiment (MRX) and the Swarthmore Spheromak Experiment (SSX) using the NIMROD extended MHD code. For MRX, we discuss the effects of toroidicity, the shape of the electron outflow region, and the effect of downstream pressure on the reconnection process. We find that much of the communication between local and global scales is due to the pressure gradients that result from the reconnection outflow. During counter-helicity push reconnection, we observe a radial shift in position of the current sheet and an asymmetric outflow, as seen in experiment.2 This asymmetric outflow is examined in terms of separate force-density contributions. For SSX, we present simulations of counter-helicity spheromak merging in both prolate and oblate flux conservers, and discuss the impact of geometry as well as two-fluid effects on the reconnection process. 1D. Biskamp et al., Phys. Plasmas 4, 1002, (1997). 2M. Inomoto et al., Phys. Rev. Lett. 97, 135002 (2006).
Computer experiments on the effect of lattice parameters on the percolation of immiscible fluids
Creators: name: Maier, Rolf
Publisher: name: University of Calgary
Year: 1988
Subjects: subject: QC 174.85 P45 M34 1988
subject: Percolation (Statistical physics) - Computer programs
subject: Lattice theory

description: Bibliography: p. 163-170.
Magnetic Reconnection With Asymmetry In The Outflow Direction
Creators: name: Murphy, Nicholas A.
name: Sovinec, Carl
name: Cassak, Paul
Publisher: name: Zenodo
Year: 2008
Subjects: magnetic reconnection

description: Magnetic reconnection with asymmetry in the outflow direction occurs in the Earth's magnetotail, spheromak merging experiments, coronal mass ejections, and astrophysical disks. We analyze the case of steady reconnection with asymmetric downstream pressure, using conservation of mass, momentum, and energy to derive the outflow velocities for both sides of the reconnection layer. As in reconnection with asymmetric inflow [1], the flow stagnation point and magnetic field null will not coincide, unless the pressure gradient is negligible at the flow stagnation point. When the two points are separated, there will be a Poynting flux across the flow stagnation point. We compare the derived properties of this model with resistive MHD simulations of driven reconnection. We perform a similar analysis for reconnection in toroidal geometry when the outflow is aligned with the radial direction. The toroidal geometry model is compared against simulations of push reconnection (similar to spheromak merging) using the geometry of the MRX device [2]. [1] P. A. Cassak & M. A. Shay, Phys. Plasmas 14, 102114 (2007) [2] N. A. Murphy & C. R. Sovinec, Phys. Plasmas 15, 042313 (2008)
BV formulation of higher form gauge theories in a superspace
Creators: name: Upadhyay, Sudhaker
name: Mandal, Bhabani Prasad
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the extended BRST and anti-BRST symmetry (including shift symmetry) in the Batalin-Vilkovisky (BV) formulation for two and three form gauge theories. Further we develop the superspace formulation for the BV actions for these theories. We show that the extended BRST invariant BV action for these theories can be written manifestly covariant manner in a superspace with one Grassmann coordinate. On the hand a superspace with two Grassmann coordinates are required for a manifestly covariant formulation of the extended BRST and extended anti-BRST invariant BV actions for higher form gauge theories.
description: 30 pages, No figure, version to appear in EPJC
Simulation And Analysis Of Magnetic Reconnection In An Experimental Geometry
Creators: name: Murphy, Nicholas A.
name: Sovinec, Carl R.
name: Cassak, Paul
Publisher: name: Zenodo
Year: 2009
Subjects: magnetic reconnection

description: The process of magnetic reconnection is important in space, laboratory, and astrophysical plasmas. The Magnetic Reconnection Experiment (MRX) is designed to study controlled reconnection in collisional and marginally collisionless plasmas (Yamada et al. 1997). We present single and two-fluid simulations of MRX using the NIMROD extended MHD code (Sovinec et al. 2004). These simulations highlight the interrelationship between the small-scale physics of the reconnection layer and the global magnetic field geometry. The communication between small and large scales is dominated by pressure gradients that result from a pileup of reconnection outflow. Toroidicity leads to asymmetry in either the inflow direction or the outflow direction, depending on the experimental mode of operation. To explain effects observed during reconnection with asymmetry in the outflow direction, we present an extension of the Sweet-Parker model that takes into account asymmetric downstream pressure. This model is applicable to reconnection in coronal mass ejections, the Earth's magnetotail, and in circumstellar disks present in hot star winds.

This research is supported by the NSF Center for Magnetic Self-Organization in Laboratory and Astrophysical Plasmas.
Congetture matematiche di base dei numeri naturali
Creators: name: Cristoni, Greta
name: Cristoni, Simone
Publisher: name: Zenodo
Year: 2022
Subjects: Congetture Numeri Naturali

description: L'articolo descrive 5 nuove congetture, relative a relazioni che collegano i numeri naturali da 1 a 9 ed il numero 0. Le congetture sono espresse con apposito linguaggio matematico ed in forma di formule.
Personalia
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 10 Nr. 6 (1957): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Magnetic Reconnection In Solar, Space, And Laboratory Plasmas
Creators: name: Murphy, Nicholas A.
Publisher: name: Zenodo
Year: 2012
Subjects: magnetic reconnection

description: Magnetic reconnection is a ubiquitous process in space, astrophysical, and laboratory plasmas. Observations of reconnection in the solar corona, such as those by the X-Ray Telescope on Hinode and the Atmospheric Imaging Assembly on the Solar Dynamics Observatory, allow us to study the large-scale consequences and dynamics of reconnection but provide only indirect information on the small-scale physics of energy release. In situ observations of reconnection in space plasmas provide detailed small-scale information, but at a very small number of points. Laboratory experiments allow both local and global dynamics to be studied with much more experimental control, but at relatively modest dimensionless parameters and separation of scales. In this talk, I will review recent progress using these different types of investigations, and discuss the need for taking these three complementary approaches to understand the fundamental physics of magnetic reconnection.
Ausstellungskataloge und Museumsberichte
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 10 Nr. 6 (1957): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Building up the spectrum of cosmic-rays in star-forming regions
Creators: name: Torres, Diego F.
name: Cillis, Analia
name: Lacki, Brian
name: Rephaeli, Yoel
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The common approach to compute the cosmic-ray distribution in an starburst galaxy or region is equivalent to assume that at any point within that environment, there is an accelerator inputing cosmic rays at a reduced rate. This rate should be compatible with the overall volume-average injection, given by the total number of accelerators that were active during the starburst age. These assumptions seem reasonable, especially under the supposition of an homogeneous and isotropic distribution of accelerators. However, in this approach the temporal evolution of the superposed spectrum is not explicitly derived; rather, it is essentially assumed ab-initio. Here, we test the validity of this approach by following the temporal evolution and spatial distribution of the superposed cosmic-ray spectrum and compare our results with those from theoretical models that treat the starburst region as a single source. In the calorimetric limit (with no cosmic-ray advection), homogeneity is reached (typically within 20%) across most of the starburst region. However, values of center-to-edge intensity ratios can amount to a factor of several. Differences between the common homogeneous assumption for the cosmic-ray distribution and our models are larger in the case of two-zone geometries, such as a central nucleus with a surrounding disc. We have also found that the decay of the cosmic-ray density following the duration of the starburst process is slow, and even approximately 1 Myr after the burst ends (for a gas density of 35 cm-3) it may still be within an order of magnitude of its peak value. Based on our simulations, it seems that the detection of a relatively hard spectrum up to the highest gamma-ray energies from nearby starburst galaxies favors a relatively small diffusion coefficient (i.e., long diffusion time) in the region where most of the emission originates.
description: To appear in MNRAS
Multiple use of water resources: adapting weirs for recreation
Creators: name: Makuk, John S.
Publisher: name: Environmental Design
Year: 1988
Subjects: subject: TC 159 M34 1988
subject: Weirs - Safety measures

description: Bibliography: p. 163-171.
description: In Southern Alberta in the past 15 years, at least 17 people have drowned in stilling basins attached to weirs. This study has focussed on an examination of the principle of multi-purpose use, meant to govern water development projects, and investigation of the implementation of this policy in reservoirs in and around Calgary. The major part of this study examines ways to reduce the drowning hazard now present at weirs. Four solutions were studied: the possibility of designing safer weirs; the effectiveness of imposing restrictions and regulations at weirs; the use of whitewater chutes to bypass such structures, and inexpensive means to modify hydrodynamics in the stilling basin to wash persons from the hydraulic jump.
Bei der Redaktion eingegangene Neuerscheinungen
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 10 Nr. 6 (1957): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
The Plasmoid Instability During Asymmetric Inflow Magnetic Reconnection
Creators: name: Murphy, Nicholas A.
name: Shen, Chengcai
name: Lin, Jun
Publisher: name: Zenodo
Year: 2012
Subjects: magnetic reconnection

description: High Lundquist number current sheets have recently been found to be unstable to the formation of plasmoids. Numerical simulations of this instability have usually assumed that the reconnecting magnetic fields are symmetric. We therefore present resistive MHD simulations of the plasmoid instability during asymmetric inflow reconnection. Asymmetry in the upstream magnetic fields modifies the scaling, onset, and dynamics of this instability. Plasmoids develop preferentially into the weak magnetic field region. Outflow jets from individual X-lines impact magnetic islands obliquely rather than directly as in the symmetric case. Consequently, momentum deposition into the magnetic islands from the outflow jets is less efficient and outward advection of the islands is somewhat slower. The islands also develop net vorticity. Finally, we discuss the implications these simulations may have on the dynamics of the plasmoid instability in three dimensions.
Antoine Pesne-Gedächtnisausstellung
Creators: name: Berckenhagen, Ekhart
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 10 Nr. 8 (1957): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Kollektivgrab Odagsen - Kleinkinderdefizit und Paläodemographie
Creators: name: Rinne, Christoph
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2020

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 70 (2001): Nachrichten aus Niedersachsens Urgeschichte
Dynamics of Non-adiabatic Charged Cylindrical Gravitational Collapse
Creators: name: Sharif, M.
name: Abbas, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper is devoted to study the dynamics of gravitational collapse in the Misner and Sharp formalism. We take non-viscous heat conducting charged anisotropic fluid as a collapsing matter with cylindrical symmetry. The dynamical equations are derived and coupled with the transport equation for heat flux obtained from the M$\ddot{u}$ller-Israel-Stewart causal thermodynamic theory. We discuss the role of anisotropy, electric charge and radial heat flux over the dynamics of the collapse with the help of coupled equation.
description: 15 pages, accepted for publication in Astrophys. Space Sci
Shining a Light on Forensic Black-Box Studies
Creators: name: Khan, Kori
name: Carriquiry, Alicia L.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Mental Health

description: Forensic science plays a critical role in the United States criminal legal system. For decades, many feature-based fields of forensic science, such as firearm and toolmark identification, developed outside the scientific community’s purview. The results of these studies are widely relied on by judges nationwide. However, this reliance is misplaced. Black-box studies to date suffer from inappropriate sampling methods and high rates of missingness. Current black-box studies ignore both problems in arriving at the error rate estimates presented to courts. We explore the impact of each type of limitation using available data from black-box studies and court materials. We show that black-box studies rely on unrepresentative samples of examiners. Using a case study of a popular ballistics study, we find evidence that these nonrepresentative samples may commit fewer errors than the wider population from which they came. We also find evidence that the missingness in black-box studies is non-ignorable. Using data from a recent latent print study, we show that ignoring this missingness likely results in systematic underestimates of error rates. Finally, we offer concrete steps to overcome these limitations. Supplementary materials for this article areavailable online.
Studies on the molecular basis of penicillin-binding protein-mediated beta-lactam resistance in haemophilus influenza
Creators: name: Malouin, Francois
Publisher: name: University of Calgary
Year: 1988
Subjects: subject: RS 165 B38 M34 1988
subject: Penicillin
subject: Beta lactam antibiotics

description: Bibliography: p. 277-311.
description: The molecular basis of clinical penicillin-binding protein-modulated beta-lactam resistance of the Haemophilus influenzae strain T-1,3 was studied. First, upon investigation of penicillin-binding proteins ( PBPs), H. influenzae strains were tested for whole-cell [3 eS] penicillin binding at either 20, 37 or Examination of the PBP profile from the beta-lactam resistant H. influenzae strain T-1,3 permitted identification of three PBPs (3a, 3b, and 4') with a diminished penicillin-binding activity compared to the isogenic sensitive strain Rd. These three PBPs were distinct from each other because they bound relatively different amounts of radiolabeled penicillin; they bound penicillin at different temperatures; they possess different penicillin saturability; and because only PBP 3a showed an altered electrophoretic mobility when eel ls were grown at 42°C. However, these three PBPs were related to each other because they were the preferred targets for three different beta-lactams in a competitive penicillin-binding assay. To understand how PEP-mediated beta-lactam resistance developed in H. influenzae, the cloning of the altered PBP expression gene f ram strain T-1, 3 was undertaken. Strain T-1, 3 DNA was used to construct a recombinant cosmid gene bank in Escherichia coli. Subcloning of individual fragments derived from one recombinant cosmid (pLB100) indicated that two adjacent fragments of DNA were both capable of transforming the susceptible strain Rd to betalactam resistance and altered PBP expression. Subsequently, by using a 3 -PJ-labeled probe made from the T-1,3 DNA region responsible for the altered PBP expression, larger homologous DNA fragments consisting in the "normal II and "altered" genes from H. inf luenzae Rd and T-1,3, respectively were cloned. Both insertions in pUC-18 vector coded for a 55-kDa product in E. coli minicells. The 55- kDa protein was unable to bind penicillin and was therefore not a PBP. A regulatory model in which the 55-kDa protein interacts with the penicillin-binding activity of PBPs was proposed. Finally, a 5-kb H. influenzae DNA fragment involved in the PEP-mediated beta-lactam resistance of strain T-1,3 was used as a probe for specific detection of H. influenzae strains in clinical specimens.
Plasma Heating During A Coronal Mass Ejection Observed By Soho
Creators: name: Murphy, Nicholas A.
name: Raymond, John C.
name: Korreck, Kelly
Publisher: name: Zenodo
Year: 2011
Subjects: coronal mass ejections
non-equilibrium ionization
plasma heating

description: Several recent observational results suggest that coronal mass ejection (CME) plasma is heated even after leaving the flare site. The source of the heating is probably the magnetic field, but the mechanisms that convert magnetic to thermal energy during these events are not well understood. We perform a time-dependent ionization analysis of a CME observed by SOHO/UVCS on 2000 June 28 to constrain plasma heating at distances of up to several solar radii. The most strongly constrained feature shows cumulative plasma heating comparable to or greater than the kinetic energy, whereas features observed early in the event showed plasma heating comparable to or less than the kinetic energy. We use these results to assess the efficacy of several candidate mechanisms, including heating by the CME current sheet, small-scale reconnection, MHD instabilities, thermal conduction, energetic particles, and wave heating.
Ein germanischer Hortfund des 3. Jahrhunderts n. Chr. aus Hildesheim, Ldkr. Hildesheim
Creators: name: Cosack, Erhard
name: Berger, Frank
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2020

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 70 (2001): Nachrichten aus Niedersachsens Urgeschichte
Target search on a dynamic DNA molecule
Creators: name: Schötz, Thomas
name: Neher, Richard A.
name: Gerland, Ulrich
Publisher: name: arXiv
Year: 2011
Subjects: subject: Biomolecules (q-bio.BM)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We study a protein-DNA target search model with explicit DNA dynamics applicable to in vitro experiments. We show that the DNA dynamics plays a crucial role for the effectiveness of protein "jumps" between sites distant along the DNA contour but close in 3D space. A strongly binding protein that searches by 1D sliding and jumping alone, explores the search space less redundantly when the DNA dynamics is fast on the timescale of protein jumps than in the opposite "frozen DNA" limit. We characterize the crossover between these limits using simulations and scaling theory. We also rationalize the slow exploration in the frozen limit as a subtle interplay between long jumps and long trapping times of the protein in "islands" within random DNA configurations in solution.
description: manuscript and supplementary material combined into a single document
Prevalence and Propagation of Fake News
Creators: name: Behzad, Banafsheh
name: Bheem, Bhavana
name: Elizondo, Daniela
name: Martonosi, Susan
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Biological Sciences not elsewhere classified
Science Policy
Mental Health

description: In recent years, scholars have raised concerns on the effects that unreliable news, or “fake news,” has on our political sphere, and our democracy as a whole. For example, the propagation of fake news on social media is widely believed to have influenced the outcome of national elections, including the 2016 U.S. Presidential Election, and the 2020 COVID-19 pandemic. What drives the propagation of fake news on an individual level, and which interventions could effectively reduce the propagation rate? Our model disentangles bias from truthfulness of an article and examines the relationship between these two parameters and a reader’s own beliefs. Using the model, we create policy recommendations for both social media platforms and individual social media users to reduce the spread of untruthful or highly biased news. We recommend that platforms sponsor unbiased truthful news, focus fact-checking efforts on mild to moderately biased news, recommend friend suggestions across the political spectrum, and provide users with reports about the political alignment of their feed. We recommend that individual social media users fact check news that strongly aligns with their political belief and read articles of opposing political bias. Supplementary materials for this article are available online.
Homological evolutionary vector fields in Korteweg-de Vries, Liouville, Maxwell, and several other models
Creators: name: Kiselev, Arthemy V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 17B80, 37K10, 81T13 (Primary) 37K05, 37K30 (Secondary)

description: We review the construction of homological evolutionary vector fields on infinite jet spaces and partial differential equations. We describe the applications of this concept in three tightly inter-related domains: the variational Poisson formalism (e.g., for equations of Korteweg-de Vries type), geometry of Liouville-type hyperbolic systems (including the 2D Toda chains), and Euler-Lagrange gauge theories (such as the Yang-Mills theories, gravity, or the Poisson sigma-models). Also, we formulate several open problems.
description: Proc. 7th International Workshop "Quantum Theory and Symmetries-7" (August 7-13, 2011; CVUT Prague, Czech Republic), 20 pages
Effects of AI in the office oil and gas industry
Creators: name: Yvan, Lebongo Eteme
Publisher: name: figshare
Year: 2023
Subjects: Artificial intelligence not elsewhere classified
Petroleum and reservoir engineering

description: The research paper examines the potential benefits of using Artificial Intelligence (AI) in the oil and gas industry to reduce environmental impact and promote sustainability. The paper explores how AI can be used to optimize resource use, reduce emissions, predict maintenance needs, and manage environmental risks. The authors argue that by embracing AI and other technologies, the oil and gas industry can make operations more efficient, sustainable, and environmentally friendly.
 The paper begins by discussing the environmental challenges associated with the oil and gas industry, including resource depletion, emissions, and environmental risks. The authors then introduce the concept of AI and explain how it can be applied to the industry to address these challenges. They provide examples of how AI can be used to optimize resource use, reduce emissions, predict maintenance needs, and manage environmental risks.
 The paper also discusses some of the potential limitations of AI and emphasizes the importance of using it in conjunction with other sustainability measures. The authors argue that companies must prioritize other sustainability measures, such as reducing waste and minimizing the use of harmful chemicals, in addition to using AI.
 Overall, the research paper provides a detailed analysis of the potential benefits of using AI in the oil and gas industry to reduce environmental impact and promote sustainability. It highlights the importance of companies embracing new technologies and prioritizing environmental responsibility to minimize their impact on the environment.
Rossby waves and polar spots in rapidly rotating stars: Implications for stellar wind evolution
Creators: name: Zaqarashvili, T. V.
name: Oliver, R.
name: Ballester, J. L.
name: Carbonell, M.
name: Khodachenko, M. L.
name: Lammer, H.
name: Leitzinger, M.
name: Odert, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Rapidly rotating stars show short-period oscillations in magnetic activity and polar appearance of starspots. The aim of this paper is to study large-scale shallow water waves in the tachoclines of rapidly rotating stars and their connection to the periodicity and the formation of starspots at high latitudes. Shallow-water magnetohydrodynamic equations were used to study the dynamics of large-scale waves at the rapidly rotating stellar tachoclines in the presence of toroidal magnetic field. Dispersion relations and latitudinal distribution of wave modes were derived. We found that low-frequency magnetic Rossby waves tend to be located at poles, but high-frequency magnetic Poincare waves are concentrated near the equator in rapidly rotating stars. These results have important implications for the evolution of the stellar wind in young Sun-like stars. Unstable magnetic Rossby waves may lead to the local enhancement of magnetic flux at high latitudes of tachoclines in rapidly rotating stars. The enhanced magnetic flux may rise upwards owing to the magnetic buoyancy in the form of tubes and appear as starspots at polar regions. Magnetic Rossby waves may also cause observed short-term periodicity in the stellar magnetic activity.
description: 12 pages, 7 figures, A&A (accepted)
A Lust for Dying
Creators: name: Bosman, Frank G.
Publisher: name: Online - Heidelberg Journal of Religions on the Internet
Year: 2020

description: Firmly grounded in Christian theological spirituality (Evagrius Ponticus) and doctrine (Gregory the Great, Thomas Aquinas), the concept of the seven deadly sins, although the exact sequence and names may differ slightly, can be traced from Dante’s Divine Comedy and Chaucer’s Canterbury Tales to David Fincher’s famous film Se7en and multiple video games, such as The Binding of Isaac, Dante’s Inferno, and the already mentioned Darksiders III. An interesting ingredient of the several cultural depictions of the seven sins in past and present, is that the presentation of their physical form (aesthetics) and the words they utter (rhetoric) is very often closely connected to the specific sin they are supposed to represent. In this process of representation, and especially personalisation, the sins are made into characters with specific traits that mirror their theological identity. Lust, for example, is commonly presented as a beautiful woman, while gluttony is represented as an individual indulging in gastronomical orgies, and so forth. In this article, I want to argue that, within the specific field of digital games, the seven deadly sins are personalised on two levels: (1) essential personalisation – the presentation of the sins reflects their own immoral identity; and (2) characteral personalisation – the presentation reflects the protagonist’s negative character traits. To do so convincingly, I will start with introducing the concept of the seven deadly sins within their proper context of the Christian (theological) tradition. Next, I will introduce and analyse the four case studies – Diablo III, The Binding of Isaac, Dante’s Inferno, and Darksiders III – focusing on the topic of the representation and personalisation of the seven deadly sins within the games. After building a synthesis based on the analysis of the case studies in order to illustrate the two levels of personalisation, I will finish with some final remarks.
description: Online - Heidelberg Journal of Religions on the Internet, Vol 15 (2020): Regular Issue
title: Satzung zur Änderung der besonderen Bestimmungen für den Bachelorstudiengang Lehramt für Sonderpädagogische Förderung mit dem Unterrichtsfach Sport an der Universität Paderborn : vom 16. März 2016
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2016
Subjects: subject: Sozialwissenschaften
subject: Bildung und Erziehung
subject: Hochschulbildung

description: Amtliche Mitteilungen / Universität Paderborn
NMR Evidence for Antiferromagnetic Transition in the Single-Component Molecular System, [Cu(tmdt)$_{2}$]
Creators: name: Takagi, Rina
name: Miyagawa, Kazuya
name: Kanoda, Kazushi
name: Zhou, Biao
name: Kobayashi, Akiko
name: Kobayashi, Hayao
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic state of the single-component molecular compound, [Cu(tmdt)$_{2}$], is investigated by means of $^{1}$H-NMR. An abrupt spectral broadening below 13 K and a sharp peak in nuclear spin-lattice relaxation rate, $T_{1}^{-1}$, at 13 K are observed as clear manifestations of a second-order antiferromagnetic transition, which is consistent with the previously reported magnetic susceptibility and EPR measurement. The ordered moment is estimated at $0.22-0.45$ $μ_{\rm B}$/molecule. The temperature-dependence of $T_{1}^{-1}$ above the transition temperature indicates one-dimensional spin dynamics and supports that the spins are on the central part of the molecule differently from other isostructural compounds.
description: 13pages, 5 figures
title: Zweite Satzung zur Änderung der Prüfungsordnung für den Masterstudiengang Electrical Systems Engineering der Fakultät für Elektrotechnik, Informatik und Mathematik an der Universität Paderborn : vom 16. März 2016
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2016
Subjects: subject: Sozialwissenschaften
subject: Bildung und Erziehung
subject: Hochschulbildung

description: Amtliche Mitteilungen / Universität Paderborn
Scale modelling of the parallel-line mode of operation of the Turam prospecting system and a comparison with the conventional mode
Creators: name: Cummins, Catharine
Publisher: name: University of Calgary
Year: 1986
Subjects: subject: TN 270 C85 1987
subject: Prospecting
subject: Electromagnetic measurements
subject: Electric prospecting

description: Bibliography: p. 521-523.
description: Physical scale modelling of the Parallel-line and Conventional modes of operation of the Turam prospecting system was performed. In the Parallel-line mode the long axis of the transmitter loop was placed perpendicular to the strike of a tabular target and traverse lines were run parallel to the transmitter . The receiver coils measured the vertical component of the magnetic field. This survey configuration causes a smaller primary field gradient along a traverse line than is caused by the Conventional configuration . The transmitter positioning enables multiple parallel targets to produce anomalies that are in proportion to their significance as conductors . Scale modelling in free-space conditions of the Parallel-line mode indicated the geometry of the anomalies caused by tabular targets of different dip angles and thicknesses and the positioning of the dominant current concentrations within such targets. Modelling of the Conventional mode allowed a comparison of the anomalies produced in the two systems to be made. The symmetrical energisation of a target in Parallel-line Turam causes a relatively simple target-anomaly spatial relationship, whereas the asymmetrical nature of the energisation in Conventional Turam causes a more complex relationship. The two modes of operation appear to be equally sensitive to different depth values of a target. The Parallel-line mode is sensitive to target strike variations and allows two targets to be visually resolved at a slightly smaller separation or larger depth than in the Conventional mode . Although the positioning of the transmitter with respect to the target in Parallel-line Turam suggests that the coupling between the primary field and the target is poor, the magnitude of the anomaly that may be measured in the Parallel-line mode is often larger than in the Conventional mode.
List and classification of Passiflora species
Creators: name: Hermsen, Elizabeth
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 310899
subject: Plant biology not elsewhere classified

description: List and classification of Passiflora species based upon the system of Feuillet and MacDougal (2003; see also MacDougal and Feuillet, 2004), with modifications as summarized in Hermsen (2021, 2023), and an additional modification to the classification within subgenus Astrophea as recently outlined by Vanderplank et al. (2023). Species were checked against the checklist compiled by Feuillet and MacDougal (2002), with POWO (2023) also being an important resource for the status of names. No attempt has been made to present a comprehensive synonymy list for individual species, although a few selected synonyms are listed for some species. Full citations for the above and other references are included in the spreadsheet.
Bei der Redaktion eingegangene Neuerscheinungen
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 9 Nr. 12 (1956): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Surface nanoscale axial photonics
Creators: name: Sumetsky, M.
name: Fini, J. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Dense photonic integration promises to revolutionize optical computing and communications. However, efforts towards this goal face unacceptable attenuation of light caused by surface roughness in microscopic devices. Here we address this problem by introducing Surface Nanoscale Axial Photonics (SNAP). The SNAP platform is based on whispering gallery modes circulating around the optical fiber surface and undergoing slow axial propagation readily described by the one-dimensional Schrödinger equation. These modes can be steered with dramatically small nanoscale variation of the fiber radius, which is quite simple to introduce in practice. The extremely low loss of SNAP devices is achieved due to the fantastically low surface roughness inherent in a drawn fiber surface. In excellent agreement with the developed theory, we experimentally demonstrate localization of light in quantum wells, halting light by a point source, tunneling through potential barriers, dark states, etc. This demonstration, prototyping basic quantum mechanical phenomena with light, has intriguing potential applications in filtering, switching, slowing light, and sensing.
Ausstellungskalender
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 9 Nr. 4 (1956): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Charge self-consistent dynamical mean-field theory based on the full-potential linear muffin-tin orbital method: methodology and applications
Creators: name: Grånäs, O.
name: Di Marco, I.
name: Thunström, P.
name: Nordström, L
name: Eriksson, O.
name: Björkman, T.
name: Wills, J. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Full charge self-consistence (CSC) over the electron density has been implemented into the local density approximation plus dynamical mean-field theory (LDA+DMFT) scheme based on a full-potential linear muffin-tin orbital method (FP-LMTO). Computational details on the construction of the electron density from the density matrix are provided. The method is tested on the prototypical charge-transfer insulator NiO using a simple static Hartree-Fock approximation as impurity solver. The spectral and ground state properties of bcc Fe are then addressed, by means of the spin-polarized T-matrix fluctuation exchange solver (SPTF). Finally the permanent magnet SmCo$_5$ is studied using multiple impurity solvers, SPTF and Hubbard I, as the strength of the local Coulomb interaction on the Sm and Co sites are drastically different. The developed CSC-DMFT method is shown to in general improve on materials properties like magnetic moments, electronic structure and the materials density.
description: 10 pages, 5 figures
Rohlin Distance and the Evolution of Influenza A virus: Weak Attractors and Precursors
Creators: name: Burioni, Raffaella
name: Scalco, Riccardo
name: Casartelli, Mario
Publisher: name: arXiv
Year: 2011
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Other Condensed Matter (cond-mat.other)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The evolution of the hemagglutinin amino acids sequences of Influenza A virus is studied by a method based on an informational metrics, originally introduced by Rohlin for partitions in abstract probability spaces. This metrics does not require any previous functional or syntactic knowledge about the sequences and it is sensitive to the correlated variations in the characters disposition. Its efficiency is improved by algorithmic tools, designed to enhance the detection of the novelty and to reduce the noise of useless mutations. We focus on the USA data from 1993/94 to 2010/2011 for A/H3N2 and on USA data from 2006/07 to 2010/2011 for A/H1N1 . We show that the clusterization of the distance matrix gives strong evidence to a structure of domains in the sequence space, acting as weak attractors for the evolution, in very good agreement with the epidemiological history of the virus. The structure proves very robust with respect to the variations of the clusterization parameters, and extremely coherent when restricting the observation window. The results suggest an efficient strategy in the vaccine forecast, based on the presence of "precursors" (or "buds") populating the most recent attractor.
description: 13 pages, 5+4 figures
Ultrasound-Assisted Microfluidic Devices: Insights And Optimization Of Sono-Microreactors
Creators: name: Navarro-Brull, F. J.
name: Poveda, P.
name: Ramis, J.
name: Gómez, R.
Publisher: name: Zenodo
Year: 2015
Subjects: ultrasound, microreactor, optimization, simulation, ultrasonic,

description: Possible drawbacks of microreactors are inefficient reactant mixing due to the predominance of laminar flow and clogging (when solid-forming reactions are performed or solid catalyst suspensions are used). Ultrasound has been successfully implemented not only to prevent these problems but also for its well-known mixing and particle-dispersion effects. Several configurations have been used for this purpose ranging from immersion of the capillaries in ultrasonic baths or cavitation tubes, to the integration of piezoelectric transducers in the stacked-exchange teflon microreactors. Numerical simulations can help both rationalize the experimental results and gain insights into the physics involved in sono-microreactors. As a result, improved designs of sono-microreactors could ultimately expand the possibilities that microfluidics devices are offering to fine chemical industries.
description: http://www.comsol.com/paper/ultrasound-assisted-microfluidic-devices-insights-and-optimization-of-sono-micro-29031

This research is funded by the EU project MAPSYN: Microwave, Acoustic and Plasma SYNtheses, under grant agreement No. CP-IP 309376 of the European Union Seventh Framework Program. -MAPSYNproject aims to bring selected innovative energy-efficient chemical reaction processes by using microreactors and a combination of microwave, ultrasound and plasma activation.
Expansionfree Fluid Evolution and Skripkin Model in f(R) Theory
Creators: name: Sharif, M.
name: Kausar, H. Rizwana
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the modified $f(R)$ theory of gravity whose higher order curvature terms are interpreted as a gravitational fluid or dark source. The gravitational collapse of a spherically symmetric star, made up of locally anisotropic viscous fluid, is studied under the general influence of the curvature fluid. Dynamical equations and junction conditions are modified in the context of f(R) dark energy and by taking into account the expansionfree evolution of the self-gravitating fluid. As a particular example, the Skripkin model is investigated which corresponds to isotropic pressure with constant energy density. The results are compared with corresponding results in General Relativity.
description: 18 pages, accepted for publication Int. J. Mod. Phys. D
Launching D-CRAFT: The Digital Content Reuse Assessment Toolkit
Creators: name: Thompson, Santi
name: Morales, Myrna
name: Chapman, Joyce
name: Jefferson, Derrick
name: Ranti Junus
name: Shiri, Ali
name: Ranti Junus
name: Hennig, Nicole
name: Kelly, Elizabeth Joan
name: Kenfield, Ayla Stein
name: Woolcott, Liz
Publisher: name: OSF
Year: 2020
Subjects: content reuse
digital library assessment
digreuse
reuse assessment

description: This talk showcases the launch of the Digital Content Reuse Assessment Framework Toolkit. It highlights toolkit components and identifies ways that practitioners can employ it to understand the impact of the digital assets they steward. Presented at Digital Library Federation Forum 2023