cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interacting Stochastic Process and Renormalization Theory
Creators: name: Volovich, Yaroslav
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A stochastic process with self-interaction as a model of quantum field theory is studied. We consider an Ornstein-Uhlenbeck stochastic process x(t) with interaction of the form x^{(α)}(t)^4, where $α$ indicates the fractional derivative. Using Bogoliubov's R-operation we investigate ultraviolet divergencies for the various parameters $α$. Ultraviolet properties of this one-dimensional model in the case $α=3/4$ are similar to those in the $ϕ^4_4$ theory but there are extra counterterms. It is shown that the model is two-loops renormalizable. For $5/8\leq α< 3/4$ the model has a finite number of divergent Feynman diagrams. In the case $α=2/3$ the model is similar to the $ϕ^4_3$ theory. If $0 \leq α< 5/8$ then the model does not have ultraviolet divergencies at all. Finally if $α> 3/4$ then the model is nonrenormalizable. This model can be used for a non-perturbative study of ultraviolet divergencies in quantum field theory and also in theory of phase transitions.
description: 15 pages, 4-eps figures, LaTeX, misprints corrected
Spin Polarized Current in the Ground State of Superconductor - Ferromagnet - Insulator Trilayers
Creators: name: Krawiec, M.
name: Gyorffy, B. L.
name: Annett, J. F.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the ground state properties of a superconductor - ferromagnet - insulator trilayer on the basis of a Hubbard Model featuring exchange splitting in the ferromagnet and electron - electron attraction in the superconductor. We solve the spin - polarized Hartree - Fock - Gorkov equations together with the Maxwell's equation (Ampere's law) fully self-consistently. For certain values of the exchange splitting we find that a spontaneous spin polarized current is generated in the ground state and is intimately related to Andreev bound states at the Fermi level. Moreover, the polarization of the current strongly depends on the band filling.
description: 13 pages, 14 figures
Entire Linux Network stack diagram
Creators: name: Hrvoje, Horvat
Publisher: name: Zenodo
Year: 2024

description: Diagram of entire Linux Network Stack, including:

Virtualization and Linux containers:

Emulation and Paravirtualization.

Network sockets.

Network stack:

Upper layer of Network stack (TCP, UDP).

Low layer of Network stack with GRO, RPS, RFS and GSO.

Network Scheduler.

NetFilter and traffic controll:

Bridge and Bond interfaces.

Tap interface, ...

Device Driver:

Queue.

NAPI.

IRQ handler.

Network functions accelerated by NIC:

Checksum offload, VLAN, VxLAN, GRE, TSO, LRO, RSS, ...

Network card.

All (above) sections (layers) include tips for optimizations and/or statistics.
Hymenophyllum polyanthos var. kuhnii Schelpe
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Hymenophyllales
Hymenophyllaceae
Hymenophyllum
Hymenophyllum polyanthos
Hymenophyllum polyanthos sw. var. kuhnii (c.chr.) schelpe

description: Hymenophyllum polyanthos Sw. var. kuhnii (C.Chr.) Schelpe  —
Habit: Fern.
Habitat: LMWF, LMDF, BZ; 1 400–3 000 m. Distribution: II.
 Voucher: Castle Forest, near waterfall, Alt. 2073 m, 2 Sep. 1979, Schippers K556 (WAG).
 References: Fries et al. (1924b), Bussmann (1993, 1994), Bussmann & Beck (1995a, 1998), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 14, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Update on the status of selenium investigations in the Elk River Valley, B.C.
Creators: name: Chapman, Peter M.
name: Berdusco, Roger Joseph
name: Jones, Ron
Publisher: name: The University of British Columbia
Year: 2009

description: Four categories of investigations have been and are being conducted in the Elk River Valley, B.C. related to Se released from coal mining: effects; monitoring; other studies; and management. Studies conducted to date have determined an absence of impacts to fish (cutthroat trout) and water birds (American dipper and spotted sandpiper) living in the predominantly lotic (flowing water) areas of the Elk River Valley. In the less common but more at risk lentic (still water) areas of the Valley, an absence of Se-related impacts has been determined for red-winged blackbirds, eight species of waterfowl, longnose sucker and Columbia spotted frog. An effects study on cutthroat trout living in a lentic environment partially confirmed the findings of the previous lotic study with this same species, specifically that cutthroat trout have a relatively high tolerance to Se. However, the two cutthroat trout effects studies also resulted in some contradictory findings. There are no indications of impacts from Se to cutthroat trout living in lotic or lentic areas of the Elk River Valley; however, a further effects study will be conducted with this species to resolve the contradictions. Monitoring studies indicate increasing concentrations of Se in waters downstream of the coal mines but no corresponding increase in fish muscle Se concentrations. Biogeochemical studies are being conducted into Se release and cycling as part of ongoing management activities. A management decision framework has been developed that provides a means to integrate present and future information to effectively manage Se releases from the coal mines to ensure environmental protection.
Hymenophyllum splendidum Bosch
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Hymenophyllales
Hymenophyllaceae
Hymenophyllum
Hymenophyllum splendidum

description: Hymenophyllum splendidum Bosch  —
Habit: Fern.
Habitat: LMWF; up to 2 600 m. Distribution: II.
 Voucher: Castle Forest Station, Alt. 2050 m, 20 Oct. 1979, Gilbert 5782 (EA).
References: Beentje (2008b), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 14, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Finite-dimensional analogs of string s t duality and pentagon equation
Creators: name: Korepanov, I. G.
name: Saito, S.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We put forward one of the forms of functional pentagon equation (FPE), known from the theory of integrable models, as an algebraic explanation to the phenomenon known in physics as st duality. We present two simple geometrical examples of FPE solutions, one of them yielding in a particular case the well-known Veneziano expression for 4-particle amplitude. Finally, we interpret our solutions of FPE in terms of relations in Lie groups.
description: LaTeX, 12 pages, 6 eps figures
Can the Equivalence Principle Survive Quantization?
Creators: name: Shiekh, A. Y.
Publisher: name: arXiv
Year: 1996
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well known that Einstein gravity is non-renormalizable; however a generalized approach is proposed that leads to Einstein gravity {\it after} renormalization. This them implies that at least one candidate for quantum gravity treats all matter on an equal footing with regard to the gravitational behaviour.
description: 10 Pages LaTeX, Plenary lecture at the International Workshop on AntiMatter Gravity and AntiHydrogen Spectroscopy, Molise, Italy May 96 (to be published in the proceedings). References updated
Chaotic behavior of confining lattice gauge field configurations
Creators: name: Biro, Tamas S.
name: Feurstein, Markus
name: Markum, Harald
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Chaotic Dynamics (nlin.CD)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the leading Lyapunov exponents of SU(2) Yang-Mills field configurations on the lattice which are initialized by quantum Monte Carlo simulations. We find that configurations in the strong coupling phase at finite temperature are substantially more chaotic than in deconfinement.
description: 9 pages LaTeX, psfig.sty rotate.sty, 6 ps figures, submitted to Heavy Ion Physics
Importance of cortactin for efficient epithelial NF-ĸB activation by Helicobacter pylori, Salmonella enterica and Pseudomonas aeruginosa, but not Campylobacter spp.
Creators: name: Tegtmeyer, Nicole
name: Esmaeili, Delara Soltan
name: Sharafutdinov, Irshad
name: Knorr, Jakob
name: Naumann, Michael
name: Alter, Thomas
name: Backert, Steffen
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: ADP-heptose
subject: NF-ĸB
subject: Helicobacter pylori
subject: T4SS
subject: cortactin
subject: Src
subject: interleukin-8
subject: inflammation
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Transcription factors of the nuclear factor kappa‐light‐chain‐enhancer of activated B cells (NF-ĸB) family control important signaling pathways in the regulation of the host innate immune system. Various bacterial pathogens in the human gastrointestinal tract induce NF-ĸB activity and provoke pro-inflammatory signaling events in infected epithelial cells. NF-ĸB activation requires the phosphorylation-dependent proteolysis of inhibitor of ĸB (IĸB) molecules including the NF-ĸB precursors through ubiquitin-mediated proteolysis. The canonical NF-ĸB pathway merges on IĸB kinases (IKKs), which are required for signal transduction. Using CRISPR-Cas9 technology, secreted embryonic alkaline phosphatase (SEAP) reporter assays and cytokine enzyme-linked immunosorbent assay (ELISA), we demonstrate that the actin-binding protein cortactin is involved in NF-ĸB activation and subsequent interleukin-8 (IL-8) production upon infection by Helicobacter pylori, Salmonella enterica and Pseudomonas aeruginosa. Our data indicate that cortactin is needed to efficiently activate the c-Sarcoma (Src) kinase, which can positively stimulate NF-ĸB during infection. In contrast, cortactin is not involved in activation of NF-ĸB and IL-8 expression upon infection with Campylobacter species C. jejuni, C. coli or C. consisus, suggesting that Campylobacter species pluralis (spp.) induce a different signaling pathway upstream of cortactin to trigger the innate immune response.
On the Use of Covariates in a Latent Class Signal Detection Model, with Applications to Constructed Response Scoring
Creators: Wang, Zijian Gerald
Publisher: name: Columbia University
Year: 2012
Subjects: Educational tests and measurements

description: A latent class signal detection (SDT) model was recently introduced as an alternative to traditional item response theory (IRT) methods in the analysis of constructed response data. This class of models can be represented as restricted latent class models and differ from the IRT approach in the way the latent construct is conceptualized. One appeal of the signal detection approach is that it provides an intuitive framework from which psychological processes governing rater behavior can be better understood. The present study developed an extension of the latent class SDT model to include covariates and examined the performance of the resulting model. Covariates can be incorporated into the latent class SDT model in three ways: 1) to affect latent class membership, 2) conditional response probabilities and 3) both latent class membership and conditional response probabilities. In each case, simulations were conducted to investigate both parameter recovery and classification accuracy of the extended model under two competing rater designs; in addition, implications of ignoring covariate effects and covariate misspecification were explored. Here, the ability of information criteria, namely the AIC, small sample adjusted AIC and BIC, in recovering the true model with respect to how covariates are introduced was also examined. Results indicate that parameters were generally well recovered in fully-crossed designs; to obtain similar levels of estimation precision in incomplete designs, sample size requirements were comparatively higher and depend on the number of indicators used. When covariate effects were not accounted for or misspecified, results show that parameter estimates tend to be severely biased, which in turn reduced classification accuracy. With respect to model recovery, the BIC performed the most consistently amongst the information criteria considered. In light of these findings, recommendations were made with regard to sample size requirements and model building strategies when implementing the extended latent class SDT model.
Bures Geometry of the Three-Level Quantum Systems. I
Creators: name: Slater, Paul B.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We compute, using a formula of Dittmann, the Bures metric tensor (g) for the eight-dimensional convex set of three-level quantum systems, employing a newly-developed Euler angle-based parameterization of the 3 x 3 density matrices. Most of the individual metric elements (g_{ij}) are found to be expressible in relatively compact form, many of them in fact being exactly zero.
description: Eight pages, LaTeX, two postscript figures, minor changes, to appear in J. Geom. Phys
title: Jahrbuch des Geschichtsvereins für das Herzogtum Braunschweig Jg. 2. 1903
Creators: name: Braunschweig, Geschichtsverein
Publisher: name: Zwissler
Year: 1903
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Braunschweigisches Jahrbuch
subject: 90

description: Jahrbücher des Braunschweigischen Geschichtsvereins, vol. 2. 1903
Hymenophyllum tunbrigense (L.) Sm.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Hymenophyllales
Hymenophyllaceae
Hymenophyllum
Hymenophyllum tunbrigense

description: Hymenophyllum tunbrigense (L.) Sm.  —
Habit: Fern.
Habitat: LMWF, BZ; 1 900–2 700 m. Distribution: I.
 Voucher: Castle Forest Camp area, Alt. 2 100– 2150 m, 3 Aug. 1978, Zogg et al. 264/4 (EA).
References: Bussmann (1994), Bussmann & Beck (1995a), Beentje (2008b), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 14, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Appendix_CF_CD_NRS.pdf
Creators: name: Ramnarayan Patro
Publisher: name: Figshare
Year: 2019
Subjects: subject: 80106 Image Processing
subject: FOS: Computer and information sciences

description: This describes the complete procedural for the statistical test of Hyperspectral data. This is the appendix part of the "Conditional Nearest Regularized Subspace classifier" manuscript.
Pairing-correlations and particle-number projection methods
Creators: name: Sheikh, J. A.
name: Ring, P.
name: Lopes, E.
name: Rossignoli, R.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Nuclear Theory (nucl-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A systematic study of the pairing-correlations derived from various particle-number projection methods is performed in an exactly soluble cranked-deformed shell model Hamiltonian. It is shown that most of the approximate particle-number projection methods including the method of Lipkin-Nogami, which is used quite extensively in nuclear structure studies, breakdown in the weak pairing limit. The results obtained from the recently formulated number-projected Hartree-Fock-Bogoliubov (PHFB) equations, on the other hand, are in complete agreement with the exact solutions of the model Hamiltonian. The pairing-energy calculated from PHFB method is shown to be finite in all the studied limits. More importantly, the numerical work involved in the solution of the PHFB equations appears to be comparable to the solution of the bare HFB equations.
description: 18 pages, 6 figures
On the enumerative geometry of branched covers of curves
Creators: Lian, Carl
Publisher: name: Columbia University
Year: 2020
Subjects: subject: Mathematics
subject: FOS: Mathematics
subject: Curves, Algebraic

description: In this thesis, we undertake two computations in enumerative geometry involving branched covers of algebraic curves. Firstly, we consider the general problem of enumerating branched covers of the projective line from a fixed general curve subject to ramification conditions at possibly moving points. Our main computations are in genus 1; the theory of limit linear series allows one to reduce to this case. We first obtain a simple formula for a weighted count of pencils on a fixed elliptic curve E, where base-points are allowed. We then deduce, using an inclusion-exclusion procedure, formulas for the numbers of maps E → P1 with moving ramification conditions. A striking consequence is the invariance of these counts under a certain involution. Our results generalize work of Harris, Logan, Osserman, and Farkas-Moschetti-Naranjo-Pirola. Secondly, we consider the loci of curves of genus 2 and 3 admitting a d-to-1 map to a genus 1 curve. After compactifying these loci via admissible covers, we obtain formulas for their Chow classes, recovering results of Faber-Pagani and van Zelm when d = 2. The answers exhibit quasimodularity properties similar to those in the Gromov- Witten theory of a fixed genus 1 curve; we conjecture that the quasimodularity persists in higher genus, and indicate a number of possible variants.
Two- and Many-Dimensional Quasi-Exactly Solvable Models With An Inhomogeneous Magnetic Field
Creators: name: Zaslavskii, O. B.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Let group generators having finite-dimensional representation be realized as Hermitian linear differential operators without nhomogeneous terms as takes place, for example, for the SO(n) group. Then orresponding group Hamiltonians containing terms linear in generators (along with quadratic ones) give rise to quasi-exactly solvable models with a magnetic field in a curved space. In particular, in the two-dimensional case such models are generated by quantum tops. In the three-dimensional one for the SO(4) Hamiltonian with an isotropic quadratic part the manifold within which a quantum particle moves has the geometry of the Einstein universe.
description: 7 pages, ReVTeX. Talk given at the 22nd International Colloqium for Group Theoretical Methods in Physics
Additional file 1 of Knockdown of long noncoding RNA GAS5 reduces vascular smooth muscle cell apoptosis by inactivating EZH2-mediated RIG-I signaling pathway in abdominal aortic aneurysm
Creators: name: Le, Tianming
name: He, Xin
name: Huang, Jianhua
name: Liu, Shuai
name: Bai, Yang
name: Wu, Kemin
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: Virology

description: Additional file 1: Table S1. Primer sequences for RT-qPCR.
Interaction-Driven Equilibrium and Statistical Laws in Small Systems. The Cerium Atom
Creators: name: Flambaum, V. V.
name: Gribakina, A. A.
name: Gribakin, G. F.
name: Ponomarev, I. V.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: Nuclear Theory (nucl-th)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: It is shown that statistical mechanics is applicable to isolated quantum systems with finite numbers of particles, such as complex atoms, atomic clusters, or quantum dots in solids, where the residual two-body interaction is sufficiently strong. This interaction mixes the unperturbed shell-model (Hartree-Fock) basis states and produces chaotic many-body eigenstates. As a result, an interaction-induced statistical equilibrium emerges in the system. This equilibrium is due to the off-diagonal matrix elements of the Hamiltonian. We show that it can be described by means of temperature introduced through the canonical-type distribution. However, the interaction between the particles can lead to prominent deviations of the equilibrium distribution of the occupation numbers from the Fermi-Dirac shape. Besides that, the off-diagonal part of the Hamiltonian gives rise to the increase of the effective temperature of the system (statistical effect of the interaction). For example, this takes place in the cerium atom which has four valence electrons and which is used in our work to compare the theory with realistic numerical calculations.
description: 25 pages, RevTeX, 5 figures in ps-format. Submitted to Phys. Rev. E
Carrier-free combination dry powder inhaler formulation of ethionamide and moxifloxacin for treating drug-resistant tuberculosis
Creators: name: Momin, Mohammad A. M.
name: Sinha, Shubhra
name: Tucker, Ian G.
name: Das, Shyamal C.
Publisher: name: Figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: This study aimed to develop a combination dry powder formulation of ethionamide and moxifloxacin HCl as this combination is synergistic against drug-resistant Mycobacterium tuberculosis (Mtb). L-leucine (20% w/w) was added in the formulations to maximize the process yield. Moxifloxacin HCl and/or ethionamide powders with/without L-leucine were produced using a Buchi Mini Spray-dryer. A next generation impactor was used to determine the in vitro aerosolization efficiency. The powders were also characterized for other physicochemical properties and cytotoxicity. All the spray-dried powders were within the aerodynamic size range of <5.0 µm except ethionamide-only powder (6.0 µm). The combination powders with L-leucine aerosolized better (% fine particle fraction (FPF): 61.3 and 61.1 for ethionamide and moxifloxacin, respectively) than ethionamide-only (%FPF: 9.0) and moxifloxacin-only (%FPF: 30.8) powders. The combination powder particles were collapsed with wrinkled surfaces whereas moxifloxacin-only powders were spherical and smooth and ethionamide-only powders were angular-shaped flakes. The combination powders had low water content (<2.0%). All the powders were physically stable at 15% RH and 25 ± 2 °C during 1-month storage and tolerated by bronchial epithelial cell-lines up to 100 µg/ml. The improved aerosolization of the combination formulation may be helpful for the effective treatment of drug-resistant tuberculosis. Further studies are required to understand the mechanisms for improved aerosolization and test the synergistic activity of the combination powder.
Using whole rock and in situ pyrite chemistry to evaluate authigenic and hydrothermal controls on trace element variability in a Zn mineralized Proterozoic subbasin
Creators: name: Magnall, Joseph M.
name: Gleeson, Sarah A.
name: Hayward, Nicholas
name: Oelze, Marcus
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Proterozoic
subject: McArthur Basin
subject: Zn resources
subject: TEs
subject: Intracontinental basin
subject: Pyrite chemistry
subject: LA-ICP-MS
subject: Barney Creek Formation
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

description: The mid-Proterozoic stratigraphy of the McArthur Basin (Australia) contains some of the most well-preserved sedimentary rocks of Precambrian age, which are also host to giant, clastic dominant (CD-type) massive sulfide Zn deposits. The most recently discovered CD-type deposit (the Teena deposit) is located in the Teena subbasin and hosted by the 1.64 Ga Barney Creek Formation. The Teena subbasin, therefore, provides the perfect natural laboratory for evaluating authigenic and hydrothermal controls on trace element (TE) variability, both of which contribute to paleoenvironmental reconstructions and ore deposit models. As the Teena deposit formed beneath the paleoseafloor, this also provides the opportunity to evaluate TE zonation around a fossilized subseafloor replacement hydrothermal system. In situ laser ablation inductively coupled mass spectrometry (LA-ICP-MS) has been used to define compositional end members in diagenetic and hydrothermal pyrite. The overgrowth of hydrothermal sulfides on diagenetic pyrite is associated with TE anomalism (Tl, Pb, As, Zn) that extends > 100 meters above the main high grade sulfide mineralization the Teena subbasin. The vertical zonation in TEs is consistent with the infiltration of hydrothermal fluids into overlying hangingwall sediments that were undergoing diagenesis. Bulk rock lithogeochemical data record covariation between total organic carbon (TOC) and a suite of TEs (Mo, Co, Ni, V). We suggest this was caused by local hydrographic factors during deposition of the Barney Creek Formation. High TOC/P molar ratios, resulting from regeneration of P in a euxinic water column, are associated with an interval overlying the main maximum flooding surface in the subbasin. The relationships between TOC, P and TEs resemble the redox architecture of a silled basin rather than an open marine margin. Sulfidic conditions developed during periods of high productivity, which were linked to nutrient supply that was enhanced by connectivity with surrounding water masses. The evidence of redox bistability, involving a delicate balance between ferruginous (anoxic, non-sulfidic) and euxinic (sulfidic) conditions, is consistent with recent models for other mid-Proterozoic sedimentary units. Nevertheless, there was a strong localised (101 km2) control on the authigenic and hydrothermal TE chemistry of the Barney Creek Formation in the Teena subbasin, which highlights a key challenge when extrapolating from data collected in partially restricted intracontinental marine settings.
Kinetic Energy Decay Rates of Supersonic and Super-Alfvenic Turbulence in Star-Forming Clouds
Creators: name: Mac Low, Mordecai-Mark
name: Klessen, Ralf S.
name: Burkert, Andreas
name: Smith, Michael D.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Astrophysics (astro-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present numerical studies of compressible, decaying turbulence, with and without magnetic fields, with initial rms Alfven and Mach numbers ranging up to five, and apply the results to the question of the support of star-forming interstellar clouds of molecular gas. We find that, in 1D, magnetized turbulence actually decays faster than unmagnetized turbulence. In all the regimes that we have studied 3D turbulence-super-Alfvenic, supersonic, sub-Alfvenic, and subsonic-the kinetic energy decays as (t-t0)^(-x), with 0.85 < x < 1.2. We compared results from two entirely different algorithms in the unmagnetized case, and have performed extensive resolution studies in all cases, reaching resolutions of 256^3 zones or 350,000 particles. We conclude that the observed long lifetimes and supersonic motions in molecular clouds must be due to external driving, as undriven turbulence decays far too fast to explain the observations.
description: Submitted to Phys. Rev. Letters, 29 Nov. 1997. 10 pages, 2 figures, also available from http://www.mpia-hd.mpg.de/theory/preprints.html#maclow
title: Jahrbuch des Geschichtsvereins für das Herzogtum Braunschweig Jg. 3. 1904
Creators: name: Braunschweig, Geschichtsverein
Publisher: name: Zwissler
Year: 1904
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Braunschweigisches Jahrbuch
subject: 90

description: Jahrbücher des Braunschweigischen Geschichtsvereins, vol. 3. 1904
Trichomanes diaphanum Kunth
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Hymenophyllales
Hymenophyllaceae
Trichomanes
Trichomanes diaphanum

description: Trichomanes diaphanum Kunth  —
Habit: Fern.
Habitat: LMWF, BZ; 1 400–2 700 m. Distribution: II.
 Voucher: Castle Forest Station, Alt. 2 200 m, 21 Oct. 1979, Gilbert 5811 (EA).
References: Bussmann (1993, 1994, 2006), Bussmann & Beck (1995a, 1995c, 1999), Beentje (2008b), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 14, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
On the isomorphism testing of graphs
Creators: Sun, Xiaorui
Publisher: name: Columbia University
Year: 2016
Subjects: Computational complexity
Combinatorial analysis
Group theory
Computer science--Mathematics
Isomorphisms (Mathematics)
Computer science

description: Graph Isomorphism is one of the very few classical problems in NP of unsettled complexity status. The families of highly regular structures, for example Steiner 2-designs, strongly regular graphs and primitive coherent configurations, have been perceived as difficult cases for graph isomorphism. These highly regular structures arise naturally as obstacles for both the classical group theory and combinatorial approaches for the graph isomorphism problem.
      In this thesis we investigate the isomorphism problem of highly regular structures. We present  new results to understand the combinatorial structure of highly regular structures, and propose some new algorithms to compute the canonical forms (and thus isomorphism testing) of highly regular structures based on the structural theorems.
      We also give an algorithm solving the isomorphism problem of two unknown graphs in the property testing setting. Our new algorithm has sample complexity matching the information theoretical lower bound up to some multiplicative subpolynomial factor.
title: Jahrbuch des Geschichtsvereins für das Herzogtum Braunschweig Jg. 4. 1905
Creators: name: Braunschweig, Geschichtsverein
Publisher: name: Zwissler
Year: 1905
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Braunschweigisches Jahrbuch
subject: 90

description: Jahrbücher des Braunschweigischen Geschichtsvereins, vol. 4. 1905
Operating for closure : life of mine waste management at Huckleberry Copper Mine
Creators: name: Lighthall, Peter C.
name: Martin, Todd
name: Christensen, Kent
Publisher: name: The University of British Columbia
Year: 2009

description: Huckleberry Mine, which started operation in 1998 and is now scheduled to close in 2010, is an example of a mine that developed a life-of-mine waste management plan, and successfully stewarded the plan through the life of the operation. MEM’s ‘Guidelines for Metal Leaching and Acid Rock Drainage at Minesites in British Columbia’ (ARD Guidelines) were being introduced at the time of the mine planning stages, and it was recognized that both tailings and a large proportion of the waste rock would be potentially acid generating. Huckleberry Mine was planned as one of the first mines in British Columbia to design and construct a major water retaining structure for co-disposal of PAG waste rock and tailings. This paper summarizes how Huckleberry developed its waste management strategy and how that strategy has been followed through the life of the mine.
title: Jahrbuch des Geschichtsvereins für das Herzogtum Braunschweig Jg. 5. 1906
Creators: name: Braunschweig, Geschichtsverein
Publisher: name: Zwissler
Year: 1906
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Braunschweigisches Jahrbuch
subject: 90

description: Jahrbücher des Braunschweigischen Geschichtsvereins, vol. 5. 1906
Breaking of Huygens–Fresnel principle in inhomogeneous Tomonaga–Luttinger liquids
Creators: name: Gluza, Marek
name: Moosavi, Per
name: Sotiriadis, Spyros
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Tomonaga–Luttinger liquids
subject: Huygens–Fresnel principle
subject: ultracold atoms
subject: inhomogeneous quantum systems
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: Tomonaga–Luttinger liquids (TLLs) can be used to effectively describe one-dimensional quantum many-body systems such as ultracold atoms, charges in nanowires, superconducting circuits, and gapless spin chains. Their properties are given by two parameters, the propagation velocity and the Luttinger parameter. Here we study inhomogeneous TLLs where these are promoted to functions of position and demonstrate that they profoundly affect the dynamics: in general, besides curving the light cone, we show that propagation is no longer ballistically localized to the light-cone trajectories, different from standard homogeneous TLLs. Specifically, if the Luttinger parameter depends on position, the dynamics features pronounced spreading into the light cone, which cannot be understood via a simple superposition of waves as in the Huygens–Fresnel principle. This is the case for ultracold atoms in a parabolic trap, which serves as our main motivation, and we discuss possible experimental observations in such systems.
title: Deutsche Apotheker-Zeitung 55. Jg. 1940
Creators: name: :None
Publisher: name: Deutscher Apotheker-Verlag Hans Hosel
Year: 1940
Subjects: subject: 615

description: Apotheker-Zeitung: Organ des Deutschen Apothekervereins - Standeszeitung deutscher Apotheker, vol. 55,1940
title: Deutsche Apotheker-Zeitung 57. Jg. 1942
Creators: name: :None
Publisher: name: Deutscher Apotheker-Verlag Hans Hosel
Year: 1942
Subjects: subject: 615

description: Apotheker-Zeitung: Organ des Deutschen Apothekervereins - Standeszeitung deutscher Apotheker, vol. 57,1942
On the Usefulness and Production of Bellwether Firms’ Management Earnings Forecasts
Creators: Tseng, Ayung
Publisher: name: Columbia University
Year: 2015
Subjects: Accounting

description: This study examines whether bellwether firms’ management earnings forecasts predict future macroeconomic trends and their propensity to issue these forecasts. I find that forecasts issued by firms producing/sourcing commodities in a large cyclical sector of the economy (defined as bellwether firms) predict real and nominal GDP growth and aggregate earnings for the subsequent four quarters. Forecasts issued towards the end of a quarter and forecasts by small bellwether firms present greater predictive power. When examining the propensity to issue forecasts, I find that bellwether firms provide less frequent disclosures than non-bellwether firms, but bellwether firms owned by many institutional investors issue more frequent disclosures than other bellwether firms. These results suggest that bellwether firms may be reluctant to issue timely disclosures because their investors can learn about them from government announcements. However, institutional investors may pressure bellwether firms to issue these timely disclosures.
On-chip Group and Phase Velocity Control for Classical and Quantum Optical Devices
Creators: Kocaman, Serdar
Publisher: name: Columbia University
Year: 2011
Subjects: Electrical engineering

description: We present group and phase velocity control for the photonic integrated circuits with an emphasis on two-dimensional photonic crystal devices in this thesis. We describe the theory, analytical and numerical designs, and experimental characterization of silicon nanophotonic devices both in classical and quantum space. These devices which include negatively refractive photonic crystals, coherently interacting nano-resonators, power splitters, and interferometers provide phase-delay and time-delay tunability that lead to new functionalities in photonic integrated circuits for on-chip information processing, optical computation and communications. The high performance designs are all compatible with CMOS fabrication processes and can be easily integrated for infrared telecommunication applications. Here, we study photonic crystals in terms of the wavelengths at which they are transparent as well as they have a band-gap. This is particularly important in this work as most of the research on photonic crystals to date has focused more on the band gaps, ignoring effects that occur in transparent wavelengths. We show that a number of applications such as zero-phase delay lines and adjustable filters can be realized based on their polarization-dependent properties and nontrivial phase effects in the transparent region and dynamic storage of light can be achieved via optical analogue of electromagnetically induced transparency in an originally non-transmitting wavelength region.
title: Deutsche Apotheker-Zeitung 58. Jg. 1943
Creators: name: :None
Publisher: name: Deutscher Apotheker-Verlag
Year: 1943
Subjects: subject: 615

description: Apotheker-Zeitung: Organ des Deutschen Apothekervereins - Standeszeitung deutscher Apotheker, vol. 58,1943
Trichomanes erosum Willd.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Hymenophyllales
Hymenophyllaceae
Trichomanes
Trichomanes erosum

description: Trichomanes erosum Willd.  —
Habit: Fern.
Habitat: LMWF; up to 2 500 m. Distribution: II.
 Voucher: Northeast Mount Kenya, Ithanguni Forest, Alt. 2 335 m, 22 Jun. 1969, Faden et al. 69/769 (EA).
References: Beentje (2008b), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 14, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
title: Jahrbuch des Geschichtsvereins für das Herzogtum Braunschweig Jg. 6. 1907
Creators: name: Braunschweig, Geschichtsverein
Publisher: name: Zwissler
Year: 1907
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Braunschweigisches Jahrbuch
subject: 90

description: Jahrbücher des Braunschweigischen Geschichtsvereins, vol. 6. 1907
One Man's Trash is Another Man's Treasure: The Transition of Clinker Brick from Disposable to Decorative
Creators: Akhtar, Alafia
Publisher: name: Columbia University
Year: 2013
Subjects: subject: Arts and crafts movement
subject: Architecture--Preservation
subject: Clinker brick
subject: Aesthetics
subject: Architecture
subject: FOS: Civil engineering

description: The exact origin of the name clinker brick is unknown, however it is said that the name may have been derived from the “quality imparted by vitrification, which causes them to give a clinking sound when struck.” In England, the 1836 Penny Cyclopedia described clinkers (also known as burrs) as “black-looking masses of vitrified brick...” The historian, Charles Thomas Davis described them as “ruptured” and by 1912 the closest definition to its current form, was given by Geologist Heinrich Ries who called the brick “roughened, discolored, and distorted.” Historically, the accidental formation of clinker brick was caused by being situated too close to the heat source of a stationary kiln. This resulted in a loss for brick makers forcing them to discard the material. In the late nineteenth century, as brick production became more uniform, clinker brick were eliminated. However, simultaneously an aesthetic shift occurred, embracing the irregularity of the brick. This phenomenon was witnessed in the architecture of the Arts and Crafts Movement and Tudor Revival. Architects of these styles believed in an anti-industrialist ideology, emphasizing craftsmanship and the use natural local materials that embodied roughness, variation, and irregularity within architecture. They used the warped features of clinker brick to impart what they believed was a rustic aesthetic and an instant sense of age to a structure. In major cities, the popularity of clinker brick was illustrated through its implementation on apartment buildings especially “garden apartments” during the construction boom of the 1920s. The material was used in conjunction with varied architectural styles (apart from the two it was primarily associated with). The misshapen brick allowed for builders to differentiate residences in an increasingly growing metropolis of similar structures. Though the brick embodied the ideologies of the Arts and Crafts and Tudor Revival visually, philosophically their use was contradictory. The two styles emphasized unaltered natural materials however, as clinker brick rose in popularity they became a mass produced commodity, heavily monitored to achieve a perfect distortion. This eliminated its natural ability to mirror the textures of nature, but instead it was forcefully used to stage such an aesthetic. Additionally, the Arts and Crafts movement sought after making crafts affordable to the average person. However, because of clinker brick’s popularity and time consuming production process, its price rose significantly higher than the average common brick. Despite the philosophical irony in the use of clinker brick, by the early twentieth century, the material was highly popular and produced by various brick manufacturing companies throughout the country.
Antiferromagnetic effects in Chaotic Map lattices with a conservation law
Creators: name: Angelini, Leonardo
Publisher: name: arXiv
Year: 2002
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Some results about phase separation in coupled map lattices satisfying a conservation law are presented. It is shown that this constraint is the origin of interesting antiferromagnetic effective couplings and allows transitions to antiferromagnetic and superantiferromagnetic phases. Similarities and differences between this models and statistical spin models are pointed out.
description: 14 pages including 9 figures
Online Algorithms for Dynamic Resource Allocation Problems
Creators: Wang, Xinshang
Publisher: name: Columbia University
Year: 2017
Subjects: Operations research
Resource allocation
Algorithms

description: Dynamic resource allocation problems are everywhere. Airlines reserve flight seats for those who purchase flight tickets. Healthcare facilities reserve appointment slots for patients who request them. Freight carriers such as motor carriers, railroad companies, and shipping companies pack containers with loads from specific origins to destinations.
      We focus on optimizing such allocation problems where resources need to be assigned to customers in real time. These problems are particularly difficult to solve because they depend on random external information that unfolds gradually over time, and the number of potential solutions is overwhelming to search through by conventional methods.
      In this dissertation, we propose viable allocation algorithms for industrial use, by fully leveraging data and technology to produce gains in efficiency, productivity, and usability of new systems. The first chapter presents a summary of major methodologies used in modeling and algorithm design, and how the methodologies are driven by the size of accessible data.
      Chapters 2 to 5 present genuine research results of resource allocation problems that are based on Wang and Truong (2017); Wang et al. (2015); Stein et al. (2017); Wang et al. (2016). The algorithms and models cover problems in multiple industries, from a small clinic that aims to better utilize its expensive medical devices, to a technology giant that needs a cost-effective, distributed resource-allocation algorithm in order to maintain the relevance of its advertisements to hundreds of millions of consumers.
Jet Schemes of Locally Complete Intersection Canonical Singularities
Creators: name: Mustata, Mircea
Publisher: name: arXiv
Year: 2000
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14B05 (Primary); 14E15, 17B20 (Secondary)

description: We prove that if X is a locally complete intersection variety, then X has all the jet schemes irreducible if and only if X has canonical singularities. After embedding X in a smooth variety Y, we use motivic integration to express the condition that X has irreducible jet schemes in terms of data coming from an embedded resolution of X in Y. We show that this condition is equivalent with having canonical singularities. In the appendix, this result is used to prove a generalization of Kostant's freeness theorem to the setting of jet schemes.
description: With an appendix by David Eisenbud and Edward Frenkel. Final version, to appear in Inventiones Mathematicae
Phase diagram of a distorted kagome antiferromagnet and application to Y-kapellasite
Creators: name: Hering, Max
name: Ferrari, Francesco
name: Razpopov, Aleksandar
name: Mazin, Igor I.
name: Valenti, Roser
name: Jeschke, Harald O.
name: Reuther, Johannes
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Computational methods
subject: Magnetic properties and materials
subject: distorted kagome antiferromagnet
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: We investigate the magnetism of a previously unexplored distorted spin-1/2 kagome model consisting of three symmetry-inequivalent nearest-neighbor antiferromagnetic Heisenberg couplings J⬡, J, and J′, and uncover a rich ground state phase diagram even at the classical level. Using analytical arguments and numerical techniques we identify a collinear Q→=0 magnetic phase, two unusual non-collinear coplanar Q→=(1/3,1/3) phases and a classical spin liquid phase with a degenerate manifold of non-coplanar ground states, resembling the jammed spin liquid phase found in the context of a bond-disordered kagome antiferromagnet. We further show with density functional theory calculations that the recently synthesized Y-kapellasite Y3Cu9(OH)19Cl8 is a realization of this model and predict its ground state to lie in the region of Q→=(1/3,1/3) order, which remains stable even after the inclusion of quantum fluctuation effects within variational Monte Carlo and pseudofermion functional renormalization group. The presented model opens a new direction in the study of kagome antiferromagnets.