cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Generalised hyperbolicity in singular space-times
Creators: name: Clarke, C J S
Publisher: name: arXiv
Year: 1997
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new concept analogous to global hyperbolicity is introduced, based on test fields. It is shown that the space-times termed here ``curve integrable'' are globally hyperbolic in this new sense, and a plausibility argument is given suggesting that the result applies to shell crossing singularities. If the assumptions behind this last argument are valid, this provides an alternative route to the assertion that such singularities do not violate cosmic censorship.
description: This replacement alters the type of solution considered from "weak" to a solution lying in a specified function space. 9 pages, TeX, eps figure included with psfig
Control-Lyapunov and Control-Barrier Functions based Quadratic Program for Spatio-temporal Specifications
Creators: name: Garg, Kunal
name: Panagou, Dimitra
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents a method for control synthesis under spatio-temporal constraints. First, we consider the problem of reaching a set $S$ in a user-defined or prescribed time $T$. We define a new class of control Lyapunov functions, called prescribed-time control Lyapunov functions (PT CLF), and present sufficient conditions on the existence of a controller for this problem in terms of PT CLF. Then, we formulate a quadratic program (QP) to compute a control input that satisfies these sufficient conditions. Next, we consider control synthesis under spatio-temporal objectives given as: the closed-loop trajectories remain in a given set $S_s$ at all times; and, remain in a specific set $S_i$ during the time interval $[t_i, t_{i+1})$ for $i = 0, 1, \cdots, N$; and, reach the set $S_{i+1}$ on or before $t = t_{i+1}$. We show that such spatio-temporal specifications can be translated into temporal logic formulas. We present sufficient conditions on the existence of a control input in terms of PT CLF and control barrier functions. Then, we present a QP to compute the control input efficiently, and show its feasibility under the assumptions of existence of a PT CLF. To the best of authors' knowledge, this is the first paper proposing a QP based method for the aforementioned problem of satisfying spatio-temporal specifications for nonlinear control-affine dynamics with input constraints. We also discuss the limitations of the proposed methods and directions of future work to overcome these limitations. We present numerical examples to corroborate our proposed methods.
description: IEEE Conference on Decision and Controls, 2019, Nice, France
title: Ein Beitrag zur Tektonik am Westrand des Subherzynen-Beckens
Creators: name: Hark, Hans
Publisher: name: Vieweg
Year: 1955
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Abhandlungen der BWG
subject: 55

description: Vorliegende Arbeit behandelt tektonische Probleme an der Grenze Westrand Subherzynes-Becken - Ostrand Mittelmeer-Mjösenzone. Durch kluft- und kleintektonische Untersuchungen wurde versucht, den Einfluß dieser im Präsalinar vorgezeichneten Störungslinie auf die Deckgebirgstektonik sowie die tektogenetische Stellung der angrenzenden Einzelstrukturen zu klären und das Ausmaß und die Bedeutung der Salztektonik zu erkennen.
Neben der klufttektogenetischen Bearbeitung der Einzelstrukturen wurde besonders in der Übergangszone eine weit stärkere Strukturvergitterung festgestellt als bisher angenommen. Im einzelnen haben diese Querstrukturen SSO-Verlauf und folgen möglicherweise präsalinaren Linien. Der tektonisch immer stark gestörte Bau der Schmalsättel wurde durch syn- bis postorogene Salztektonik erklärt. Im gesamten Untersuchungsgebiet wurden 6 Hauptkluftscharen nachgewiesen, deren unterschiedliche Häufigkeiten durch die zugehörige Struktur oder durch örtliche Dislokationen bedingt sind.
description: This publication deals with tectonic problems from the cleft- or joint, and minute tectonic aspect. These problems occur on the boundry separating the western edge of the Subherzynian Basin from the eastern edge of the Mediterranean-Myose Zone. What influence has this fault line (already apparent in the pre-salinarian period) had on the tectonic movement of the "Deckgebirge" (post-salinar strata)? What influences were the particular structures subject to and what effect has the Permian salt had?
Besides the tecto-genetic explication of the single structures, there occured in the transition zone between the compressed structures (which are also proved to be joint- or cleft tectonical) in the East, and the "tension structures" in the West, a much stronger interlacing of the structures than has previously been assumed. In particular transvers folds running towards the SSE have been recognized, and it may very well be that they follow pre-salinarian lines. The structure of the narrow saddles which is often very irregular , may be explained by synto post-orogene salt shiftings (Salt Tectonic). In the whole area six main cleft- or joint directions have been found, the varying frequency of which may be explained by the structures belonging to them and by local dislocations.
Low temperature properties of a quantum particle coupled to dissipative environments
Creators: name: Guinea, F.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the dynamics of a quantum particle coupled to dissipative (ohmic) environments, such as an electron liquid. For some choices of couplings, the properties of the particle can be described in terms of an effective mass. A particular case is the three dimensional dirty electron liquid. In other environments, like the one described by the Caldeira-Leggett model, the effective mass diverges at low temperatures, and quantum effects are strongly suppressed. For interactions within this class, arbitrarily weak potentials lead to localized solutions. Particles bound to external potentials, or moving in closed orbits, can show a first order transition, between strongly and weakly localized regimes.
description: 10 pages
title: Agricultural machines. Sowing machines
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2024

description: The study aid provides information on adjustments and preparation for operation of machines widely used in agricultural production for sowing grain crops. The basic rules for checking the technical condition of machines, their settings, adjustments and instructions for safe operation in the field are outlined. The study aid is intended for classroom and independent work of students studying the discipline “Agricultural Machines” who are mastering undergraduate educational programs in the field of preparation “Agricultural Engineering” and other engineering specialties and areas, and can also be useful for a wide range of readers: managers and specialists of agro-industrial complex (AIC).
Presentations for the punctured mapping class groups in terms of Artin groups
Creators: name: Labruere, Catherine
name: Paris, Luis
Publisher: name: arXiv
Year: 1999
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57N05, 20F36, 20F38

description: Consider an oriented compact surface F of positive genus, possibly with boundary, and a finite set P of punctures in the interior of F, and define the punctured mapping class group of F relatively to P to be the group of isotopy classes of orientation-preserving homeomorphisms h: F-->F which pointwise fix the boundary of F and such that h(P) = P. In this paper, we calculate presentations for all punctured mapping class groups. More precisely, we show that these groups are isomorphic with quotients of Artin groups by some relations involving fundamental elements of parabolic subgroups.
description: Published by Algebraic and Geometric Topology at http://www.maths.warwick.ac.uk/agt/AGTVol1/agt-1-5.abs.html
Setaria poiretiana 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
Liliopsida
Poales
Poaceae
Setaria
Setaria poiretiana

description: Setaria poiretiana (Schult.) Kunth  —
Habit: Herb.
Habitat: LMWF; up to 2 300 m. Distribution: I.
 Voucher: Chogoria Track, Alt. 2 151 m, 28 Jan. 2015, SAJIT 002961 (EA).
Reference: 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 39, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Modeling and Simulation of Solar Photovoltaic Cell for the Generation of Electricity in UAE
Creators: name: Sakib, Shadman
name: Siddique, Md. Abu Bakr
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: This paper proposes the implementation of a circuit based simulation for a Solar Photovoltaic (PV) cell in order to get the maximum power output. The model is established based on the mathematical model of the PV module. As the PV cell is used to determine the physical and electrical behavior of the cell corresponding to environmental factors such as temperature and solar irradiance, this paper evaluates thirty years solar irradiation data in United Arab Emirates (UAE), also analyzes the performance parameters of PV cell for several locations. Based on the Shockley diode equation, a solar PV module is presented. However, to analyze the performance parameters, Solarex MSX 120, a typical 120W module is selected. The mathematical model for the chosen module is executed in Matlab. The consequence of this paper reflects the effects of variation of solar irradiation on PV cell within UAE. Conclusively, this paper determines the convenient places for implementing the large scale solar PV modules within UAE.
description: To be published in 5th International Conference on Advances in Electrical Engineering (ICAEE-2019)
Metric-Affine Gauge Theory of Gravity I. Fundamental Structure and Field Equations
Creators: name: Gronwald, Frank
Publisher: name: arXiv
Year: 1997
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We give a self-contained introduction into the metric-affine gauge theory of gravity. Starting from the equivalence of reference frames, the prototype of a gauge theory is presented and illustrated by the example of Yang-Mills theory. Along the same lines we perform a gauging of the affine group and establish the geometry of metric-affine gravity. The results are put into the dynamical framework of a classical field theory. We derive subcases of metric-affine gravity by restricting the affine group to some of its subgroups. The important subcase of general relativity as a gauge theory of translations is explained in detail.
description: 43 pages, LaTeX, six .eps figures included, uses lscape.sty, to appear in Int. J. Mod. Phys. D
Public Displays of Knowledge: The Scientific Spectacle of Quackery in England, 1660-1740
Creators: Mihailescu, Ion
Publisher: name: Columbia University
Year: 2010
Subjects: History

description: Historians have generally favored the production of science to the detriment of its experience and perception by a lay audience. This paper goes against the general trend by using the medical phenomena of quackery in England in between 1660-1740 as an approach for the study of the scientific popularization process. Approaching quackery from the perspective of public displays of knowledge has the advantage of preserving a symmetric and unbiased perspective which does not insert predefined differences between the scientific claims of accepted communities (like the Royal Society) and the "pseudo-scientific" advertisements of different quacks. Because the activity of quacks was mainly a commercial one, quack pamphlets contain to a great extent those scientific ideas which most appealed to the general public. At the same time, these pamphlets not only reflect but have also shaped the scientific understanding of common people. This approach allows me to address some fundamental issues in the writing of history of scientific popularization. The immediate advantage is that such a narrative does not reduce the popularization of scientific ideas to a diffusionist model which presents a one-way exchange process and denies agency to the audience of these ideas. The analysis of quack pamphlets will allow me not only to evaluate the influence of the public on the displayed knowledge, but also to speculate on the response of the audience. A careful analysis will bring in the audience as an active part of the exchange process, and it will also explore the plasticity of certain scientific ideas -- the way their meanings change as they are translated and transmuted into a different context. Compared to other historians of quackery, I am less interested in the way quacks "tricked" people into buying their products (in the sense of a history of advertising), but fascinated to explore the ways scientific knowledge was displayed to the public, and especially how it was perceived and experienced by it.
title: Über den Stoffwechsel eines Paraffin verwertenden Bakterienstammes
Creators: name: Streschnak, Benno
name: Schwartz, W.
Publisher: name: Vieweg
Year: 1955
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Abhandlungen der BWG
subject: 57

description: A synthetic medium containing paraffin, especially of C14-C18, as a source of carbon was able to support growth and pigment- formation of strain HP/a of Pseudomonas aeruginosa (pyocyanea) which has been isolated from paraffin dirt of an oil well.
Among the pigments, pyocyanine and 2-nonyl-4-oxychinolin have been identified. Growth and pigment formation are also well supported by carbon acids up to C8 and by carbinols C5-C8.
title: Biegen, Knicken und Schwingen des mehrfeldrigen geraden Balkens
Creators: name: Falk, Sigurd
Publisher: name: Vieweg
Year: 1955
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Abhandlungen der BWG
subject: 62

description: Das Problem des Biegens, Knickens und Schwingens von geraden Balken mit mehreren Feldern wird mit Hilfe von Matrizen übersichtlich formuliert und im Falle feldweise konstanter Kenngrößen allgemein gelöst.
description: By using of matrices the problem of bending, buckling and oscillating of a straight beam with several sections is systematical formulated, and is solved in case of constant section-coefficients.
A hint of matter underdensity at low $z$?
Creators: name: Colgáin, Eoin Ó
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
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: The $Λ$CDM cosmological model provides to first approximation a good description of the universe, but various tensions with data, most notably Hubble tension, persist. In this work we confront $Λ$CDM with the Pantheon Type Ia supernovae dataset and perform a two-parameter fit of the distance modulus for a running cut-off $z_{\textrm{max}}$. We observe that in a window between $z_{\textrm{max}} \approx 0.1$ and $z_{\textrm{max}} \approx 0.16$ there is a 1 - 2 $σ$ discrepancy with the Planck value $ω_m = 0.315 \pm 0.007$, which points to a potential matter underdensity. For high-energy theorists, the analysis appears to support the de Sitter Swampland conjecture.
description: 9 pages, my first foray into astro-ph, feedback welcome; v2 11 pages, analysis improved, references updated; v3 corrections to statistical significance, version to appear in JCAP
Setaria pumila Roem. & Schult.
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
Liliopsida
Poales
Poaceae
Setaria
Setaria pumila

description: * Setaria pumila (Poir.) Roem. & Schult.  —
Habit: Herb.
Habitat: LMDF; up to 3 100 m. Distribution: IV.
 Voucher: Sirimon Track, Alt. 2 100 m, 27 Jul. 1975, Cotthem 1240 (WAG).
Reference: N/A.
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 39, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Kotchevnik tapinus
Creators: name: Alipanah, Helen
name: Yakovlev, Roman
name: Falsafi, Hossein
name: Witt, Thomas
name: Saldaitis, Aidas
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Cossidae
Kotchevnik
Kotchevnik tapinus

description: Kotchevnik tapinus (Püngeler, 1898)
(Fig. 15B)
 Cossus tapinus Püngeler, 1898, Soc. Ent. 13 (8): 57.
LT: Transcaspien, Merw, Sefir-kuh [Kulyab, Tadzhikistan]. Type material (syntypes) in MHUB.
 Material examined. HMIM: Fârs Prov.: 1 ♂, Âbâdeh, Shuljestân, 2000 m, 30.iv.1985, leg. Mirzâyâns, Hâshemi; Hormozgân Prov.: 1 ♂, Hâji Âbâd, Tezerj, 84 m, 18.iv.2004, leg. Moghaddam, Serri; Kermân Prov.: 2 ♂♂, Bâft, Darreh Pahn, 1750 m, 21.v.1977, leg. Safavi, Pâzuki, Abâi (gen. prep. No. HA-831, HMIM), 2 ♂♂, Jiroft, 43 km N Kahnuj, 540 m, 16.v.1977, leg. Safavi, Pâzuki, 1 ♂, Rafsanjân, Sarcheshmeh, 2250, 19.v.1996, leg. Sarafrâzi, Badii; Khuzestân Prov.: 1 ♂, Shushtar, Kârun Co., 10.vi.1998, leg. Ebrâhimi, Mofidi-Neyestânak, 1 ♂ 1 ♀, Dezful, Haft Tappeh, 70 m, 13.v.1975, leg. Pâzuki, Borumand (gen. prep. No. HA-2350, HMIM); Sistân and Baluchestân Prov.: 1 ♂, Châbahâr, Tis, 10 m, 17.v.1972, leg. Abâi, Ebert; Tehrân Prov.: 2 ♂♂, Parchin (40 km E Tehrân), 26.v.2005, leg. Fibiger, Zahiri (gen. prep. No. HA-2067, HMIM).
 NHRS: 9 ♂♂, Iran, Baloutchistan (= Sistân and Baluchestân), Strasse Knach (= Khâsh)- Zahedan, Fort Sengan (= Sangân), 1800 m, 30.iv.1938, leg. Brandt.
 MWM: 1 ♂, Iran, Beloudzhistan (= Sistân and Baluchestân), Strasse Khach (= Khâsh)- Zahedan, Fort Sengan (= Sangân), 1800 m, 1938, ex coll. Brandt; 1 ♂, Iran, Fars, Firouzabad, Afzar, 16.iv.1953, leg. Kosch Kouli (= Kashkouli); 3 ♂♂, Iran, Prov. Semnar (= Semnân), 28 km S of Meiamel (= Mayamey), 1560 m, 7.v.2000, leg. Szabo & Hentschei.
 Distribution. Tajikistan, Turkmenistan, Iran, Afghanistan, Pakistan (Staudinger & Rebel 1901; Daniel 1964b, 1965b, 1971; Schoorl 1990; Yakovlev 2004a).
 Distribution in Iran. N, W, and S Iran (Fig. 32F).
 Remarks. In the all examined males, the anterior end of juxta was triangular, having a partly distinct incision (Fig. 17H).
description: Published as part of Alipanah, Helen, Yakovlev, Roman, Falsafi, Hossein, Witt, Thomas & Saldaitis, Aidas, 2021, 5062, pp. 1-100 in Zootaxa 5062 (1) on pages 57-58, DOI: 10.11646/zootaxa.5062.1.1, http://zenodo.org/record/5808035
Electron Counting Statistics for Non-Additive Environments
Creators: name: McConnell, Conor
name: Nazir, Ahsan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Molecular electronics is a rapidly developing field focused on using molecules as the structural basis for electronic components. It is common in such devices for the system of interest to couple simultaneously to multiple environments. Here we consider a model comprised of a double quantum dot (or molecule) coupled strongly to vibrations and weakly to two electronic leads held at arbitrary bias voltage. The strong vibrational coupling invalidates treating the bosonic and electronic environments simply as acting additively, as would be the case in the weak coupling regime or for flat leads at infinite bias. Instead, making use of the reaction coordinate framework we incorporate the dominant vibrational coupling effects within an enlarged system Hamiltonian. This allows us to derive a non-additive form for the lead couplings that accounts properly for the influence of strong and non-Markovian coupling between the double dot system and the vibrations. Applying counting statistics techniques we track electron flow between the double dot and the electronic leads, revealing both strong-coupling and non-additive effects in the electron current, noise and Fano factor.
description: 16 pages, 6 figures. v2 - close to published version
Setaria sphacelata Moss
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
Liliopsida
Poales
Poaceae
Setaria
Setaria sphacelata

description: Setaria sphacelata (Schumach.) Stapf & C.E.Hubb. ex Moss  —
Habit: Herb.
Habitat: LMWF, LMDF, BZ; up to 3 300 m. Distribution: II.
 Voucher: Near Ontulili Forest Station, Alt. 2 162 m, 5 Aug. 2015, SAJIT 003162 & 003163 (HIB).
References: Fries & Fries (1928), Young & Young (1983), Bussmann (1993, 1994).
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 39, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
title: Experimenteller Beitrag zum Reibungseinfluß auf die Strömung durch ebene Schaufelgitter
Creators: name: Gersten, Klaus
Publisher: name: Vieweg
Year: 1955
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Abhandlungen der BWG
subject: 62

description: In order to clarify the influence of viscosity in cascade problems, two very simple cascade arrangements have been investigated experimentally: 1) a flat plate cascade with an angle of stagger of 45° and inflow direction parallel to the plates, 2) a cascade consisting of circular cylinders with angle of inflow of 45°. The pressure drop across the cascade and the angle of deflection have been measured for different solidity ratios, both being due purely to viscosity effects. For the flat plate cascade the deflection is towards the trailing edge plane, but for the circular cylinder cascade in the opposite direction. For the flat plate cascade there is good agreement of experimental and theoretical results as obtained from boundary layer theory. For the circular cylinder cascade the deflection is caused by asymmetrical separation of the flow, but there is no theory available.
Public Housing Redevelopment and Crime: The New Communities Initiative, Washington, DC
Creators: Altskan, Alexander
Publisher: name: Columbia University
Year: 2015
Subjects: Public housing--Social aspects
Public housing--Planning
Public housing--Maintenance and repair
Crime in public housing
Gentrification
Crime
Public housing
City planning
Regional planning

description: This paper focuses on the intersections of public housing redevelopment, "gentrification," and crime in Washington, DC. Using the four public housing sites that are part of the New Communities Initiative redevelopment program, it examines the changes and trends in crime that these selected sites and their surrounding areas have experienced since the program s inception. Structurally, this study first looks at the history and policies behind the New Communities Initiative, identifying which aspects of the program have had more success than others and why. Next, combining a number of spatial and statistical analysis techniques, it examines the changes in crime that have occurred at the four targeted public housing sites. To end, it attempts to establish what the relationship has been between certain socioeconomic conditions and the changes in crime, assessing how the selected areas have fared in comparison to the rest of the city, and determining the possible influence of redevelopment efforts. Ultimately, this paper produces a historic narrative of the New Communities Initiative and its surrounding neighborhoods, while providing a useful case study of how public housing redevelopment can be applied to combat crime in the contemporary urban setting of the United States.
On form-factors in Sin(h)-Gordon theory
Creators: name: Rosly, A.
name: Selivanov, K.
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We present here an explicit classical solution of the type of perturbiner in Sin(h)-Gordon model. This solution is a generating function for form-factors in the tree approximation.
description: 10 pages, latex
Noncommutative gauge theories on D-branes in non-geometric backgrounds
Creators: name: Hull, Chris
name: Szabo, Richard J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We investigate the noncommutative gauge theories arising on the worldvolumes of D-branes in non-geometric backgrounds obtained by T-duality from twisted tori. We revisit the low-energy effective description of D-branes on three-dimensional T-folds, examining both cases of parabolic and elliptic twists in detail. We give a detailed description of the decoupling limits and explore various physical consequences of the open string non-geometry. The T-duality monodromies of the non-geometric backgrounds lead to Morita duality monodromies of the noncommutative Yang-Mills theories induced on the D-branes. While the parabolic twists recover the well-known examples of noncommutative principal torus bundles from topological T-duality, the elliptic twists give new examples of noncommutative fibrations with non-geometric torus fibres. We extend these considerations to D-branes in backgrounds with R-flux, using the doubled geometry formulation, finding that both the non-geometric background and the D-brane gauge theory necessarily have explicit dependence on the dual coordinates, and so have no conventional formulation in spacetime.
description: 36 pages, 1 table; v2: minor corrections and improvements; v3: correct revision uploaded; v4: more minor corrections and improvements; Final version to appear in JHEP
Theorems on shear-free perfect fluids with their Newtonian analogues
Creators: name: Senovilla, J. M. M.
name: Sopuerta, C. F.
name: Szekeres, P.
Publisher: name: arXiv
Year: 1997
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we provide fully covariant proofs of some theorems on shear-free perfect fluids. In particular, we explicitly show that any shear-free perfect fluid with the acceleration proportional to the vorticity vector (including the simpler case of vanishing acceleration) must be either non-expanding or non-rotating. We also show that these results are not necessarily true in the Newtonian case, and present an explicit comparison of shear-free dust in Newtonian and relativistic theories in order to see where and why the differences appear.
description: 23 pages, LaTeX. Submitted to GRG
Chiral algebras from Ω-deformation
Creators: name: Oh, Jihwan
name: Yagi, Junya
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the presence of an $Ω$-deformation, local operators generate a chiral algebra in the topological-holomorphic twist of a four-dimensional $\mathcal{N} = 2$ supersymmetric field theory. We show that for a unitary $\mathcal{N} = 2$ superconformal field theory, the chiral algebra thus defined is isomorphic to the one introduced by Beem et al. Our definition of the chiral algebra covers nonconformal theories with insertions of suitable surface defects.
description: 26 pages. v3: A reference added. Published version
Androlyperus Crotch 1873
Creators: name: Viswajyothi, Keezhpattillam
name: Clark, Shawn M.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Chrysomelidae
Androlyperus

description: Genus Androlyperus Crotch, 1873
Androlyperus Crotch, 1873: 55 (type species Androlyperus fulvus Crotch, 1873, by monotypy). Malacamerus Wilcox, 1951: 93 (type species Androlyperus maculatus LeConte, by original designation).
Remarks
This genus includes six described species. They occur in the southwestern United States and northwestern Mexico. See Figs 128 and 232 for a habitus illustration and morphological details. See Clark (2001) for a key to species. In contrast to the male modification of some species of Malacorhinus, the male modification in Androlyperus is at the apicolateral angle of the elytron, rather than near the mid-length of the elytron.
description: Published as part of Viswajyothi, Keezhpattillam & Clark, Shawn M., 2022, New World genera of Galerucinae Latreille, 1802 (tribes Galerucini Latreille, 1802, Metacyclini Chapuis, 1875, and Luperini Gistel, 1848): an annotated list and identification key (Coleoptera: Chrysomelidae), pp. 1-102 in European Journal of Taxonomy 842 on pages 28-29, DOI: 10.5852/ejt.2022.842.1945, http://zenodo.org/record/7222499
Sporobolus africanus Robyns & Tournay
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
Liliopsida
Poales
Poaceae
Sporobolus
Sporobolus africanus

description: Sporobolus africanus (Poir.)Robyns&Tournay  —
Habit:Herb.
Habitat:LMDF,UMF; up to3 200m.Distribution: I.
 Voucher: Mutamayu Farm on Burguret River, Alt. 1 950 m, 1 Jan. 2000, Robertson 7348 (EA).
References: Fries & Fries (1926), Young & Young (1983), Bussmann (1994), 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 39, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Ferromagnetic Luttinger Liquids
Creators: name: Bartosch, Lorenz
name: Kollar, Marcus
name: Kopietz, Peter
Publisher: name: arXiv
Year: 2002
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study weak itinerant ferromagnetism in one-dimensional Fermi systems using perturbation theory and bosonization. We find that longitudinal spin fluctuations propagate ballistically with velocity v_m << v_F, where v_F is the Fermi velocity. This leads to a large anomalous dimension in the spin-channel and strong algebraic singularities in the single-particle spectral function and in the transverse structure factor for momentum transfers q ~ 2 Delta/v_F, where 2 Delta is the exchange splitting.
description: 4 pages, 3 figures
Sporobolus agrostoides Chiov.
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
Liliopsida
Poales
Poaceae
Sporobolus
Sporobolus agrostoides

description: Sporobolus agrostoides Chiov.  —
Habit: Herb.
Habitat: LMDF; up to 2 800 m. Distribution: II.
 Voucher: Mutamayu Farm on Burguret River, Alt. 1 950 m, 6 Jan. 2000, Robertson 7359 (EA).
References: Bussmann (1994), 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 40, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
title: Die Spannungsfunktionen einer Dyname
Creators: name: Schaefer, Hermann
Publisher: name: Vieweg
Year: 1955
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Abhandlungen der BWG
subject: 62

description: Es wird der Tensor der Spannungsfunktionen eines Stabes untersucht, der durch eine Dyname belastet ist. Zusammenhänge mit der Volterraschen Theorie der Distorsionen werden besprochen.
description: For a bar, loaded by a skrew of forces, the Tensor of Stress-Functions is investigated. Connections with Volterra's "Theorie of Distorsions" are discussed.
Public Private Partnerships: An Off Balance Experience
Creators: Aaron, Meagan
Publisher: name: Columbia University
Year: 2015
Subjects: Roads--Design and construction--Planning
Roads--Design and construction--Government policy
Roads--Finance--Government policy
Roads--Design and construction--Finance
Public-private sector cooperation
Roads--Design and construction
City planning
Transportation--Planning

description: The development and maintenance of road networks has become a fundamental factor in a country's success. In the United States, the process of design, construction, financing and maintenance of individual roads has been organized in several different ways. The most preferential form of governance in the United States has become public private partnerships. Cases of attempts by different states governments to implement public private partnerships in the realm of surface transportation reveal major difficulties in governance, policy, as well as questions of ethical conduct. The government's perception of the private sector's capability of rescuing American highway system is detailed throughout the paper. The partnership between the government and the private sector instead of combining the strengths of each seems to combine the problems inherent in each. The origin of the private entity's association is illustrated as means of giving a background of the shift in the government's position in favor public private partnerships.
Exact solution for a quantum field with $δ$-like interaction
Creators: name: Solodukhin, Sergey N.
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: A quantum field described by the field operator $Δ_{a}=Δ+ aδ_Σ$ involving a $δ$-like potential is considered. Mathematically, the treatment of the $δ$-potential is based on the theory of self-adjoint extension of the unperturbed operator $Δ$. We give the general expressions for the resolvent and the heat kernel of the perturbed operator $Δ_{a}$. The main attention is payed to $d=2$ $δ$-potential though $d=1$ and $d=3$ cases are considered in some detail. We calculate exactly the heat kernel, Green's functions and the effective action for the operator $Δ_{a}$ in diverse dimensions and for various spaces $Σ$. The renormalization phenomenon for the coupling constant $a$ of $d=2$ and $d=3$ $δ$-potentials is observed. We find the non-perturbative behavior of the effective action with respect to the renormalized coupling $a_{ren}$.
description: 18 pages, latex, no figures, new references added
Decay Replay Mining to Predict Next Process Events
Creators: name: Theis, Julian
name: Darabi, Houshang
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: In complex processes, various events can happen in different sequences. The prediction of the next event given an a-priori process state is of importance in such processes. Recent methods have proposed deep learning techniques such as recurrent neural networks, developed on raw event logs, to predict the next event from a process state. However, such deep learning models by themselves lack a clear representation of the process states. At the same time, recent methods have neglected the time feature of event instances. In this paper, we take advantage of Petri nets as a powerful tool in modeling complex process behaviors considering time as an elemental variable. We propose an approach which starts from a Petri net process model constructed by a process mining algorithm. We enhance the Petri net model with time decay functions to create continuous process state samples. Finally, we use these samples in combination with discrete token movement counters and Petri net markings to train a deep learning model that predicts the next event. We demonstrate significant performance improvements and outperform the state-of-the-art methods on nine real-world benchmark event logs.
description: Revised manuscript. Github repository added
Dilatonic Black Holes in Higher-Curvature String Gravity II: Linear Stability
Creators: name: Kanti, P.
name: Mavromatos, N. E.
name: Rizos, J.
name: Tamvakis, K.
name: Winstanley, E.
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We demonstrate linear stability of the dilatonic Black Holes appearing in a string-inspired higher-derivative gravity theory with a Gauss- Bonnet curvature-squared term. The proof is accomplished by mapping the system to a one-dimensional Schrodinger problem which admits no bound states. This result is important in that it constitutes a linearly stable example of a black hole that bypasses the `no-hair conjecture'. However, the dilaton hair is `secondary'in the sense that it is not accompanied by any new quantum number for the black hole solution.
description: 25 pages LaTeX file, 5 LaTeX figures (included)
First Nations engagement in mine closure : Sä Dena Hes mine decommissioning and reclamation
Creators: name: Jeffrey, C. M.
name: Unger, M. L.
name: Pugh, J. C.
Publisher: name: The University of British Columbia
Year: 2016

description: The Sä Dena Hes mine, which produced lead and zinc concentrates, is located approximately 70 km north of the Town of Watson Lake, Yukon Territory, Canada and lies within the traditional territory of the Liard First Nation. The decision to enter the site into permanent closure was made in 2013. Under the mine’s licenses, reclamation must be substantially completed by 31 December 2015. Teck Resources Limited retained Amec Foster Wheeler Environment & Infrastructure in 2013 to carry out the implementation of Teck’s closure plan. The involvement of First Nations personnel was one of the main project priorities. During the short 2013 construction season, First Nations personnel worked over 60% of all on-site man-hours. The bulk of construction activities needed to be completed in 2014 to prepare for final reclamation activities to be carried out in 2015 during the final construction period. The strategy for completing the aggressive 2014 project phase within a limited timeframe included engaging larger general contractors that could handle the large scopes of work with stipulations during the tendering process of required First Nations engagement as part of the contractor selection process. Some of the site works, including items such as road maintenance and pipeline removal, were specifically left out of tender packages and awarded directly to local First Nations contractors to further promote their engagement in the project. Other First Nations engagement included hiring environmental monitors and first-aid attendants. The 2014 season saw more than 50% of all Teck-contracted man-hours on-site worked by First Nations personnel. Overall, First Nations personnel have worked 53.2% of all man-hours (26,754 out of 50,242 total man-hours) on Teck-contracted project aspects.
title: Arbeitsteilung und Spezialisierung in der Landbauwissenschaft
Creators: name: Heuser, Otto
Publisher: name: Vieweg
Year: 1955
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Abhandlungen der BWG
subject: 3

description: Die zunehmende Aufgliederung des Wissens wird aus dem Entwicklungsprinzip begründet. Die Gefahren werden aufgezeigt, die mit einer zu weitgehenden Arbeitszerlegung auftreten können. Am Beispiel des Landbaus wird die allmähliche Entstehung einer Wissenschaft aus "Kunde" und "Lehre" gezeigt. Die Trennung von Forschung und Lehre wird als neuer Weg einer fortschrittlichen Zusammenarbeit dargestellt.
description: The increasing subdivision of science is deducted from the principle of development. The dangers involved in a too far going division of labour are demonstrated. By the instance of agriculture the gradual genesis of a science out of "lore" and "instruction" is shown.
The separation of research and teaching is worked out as a new way of a progressive collaboration.
Sporobolus fimbriatus Nees
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
Liliopsida
Poales
Poaceae
Sporobolus
Sporobolus fimbriatus

description: Sporobolus fimbriatus (Trin.) Nees  —
Habit: Herb.
Habitat: LMDF; up to 2 200 m. Distribution: II.
Voucher: N/A.
Reference: Fries & Fries (1926).
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 40, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Public Private Partnerships: A look inside using private sector expertise to build public sector needs
Creators: Gallo, Alexander
Publisher: name: Columbia University
Year: 2018
Subjects: City planning
Public-private sector cooperation
Transportation--Planning
Housing--Planning
Urban transportation--Finance

description: Today, governments have less money to fund public projects and are trying to solve this through Public-Private Partnerships. This paper reviews several case studies for public private partnerships such as Via Verde, an affordable housing development in the Bronx, New York and the Eagle P3 fast track, a light rail expansion in Denver, Colorado. In order to determine the success of the projects, I review the goal of the project as well as the goals of the public and private entities. For the Eagle P3 I was able to measure the difference in proposed travel time and actual travel time to determine if the system was operating successfully. For the Via Verde I reviewed the planned affordable rent prices and matched them with what they are actually going for to see if the units were actually affordable to the people in the area. In both cases the results proved to be positive. The light rail was running on time with no delays and the units in the Via Verde were affordable to the people in the area. I also review the financial structuring of the Eagle P3 to determine the burden that is put on to the public sector. The findings suggest that Public-Private Partnerships can be beneficial for public sector needs.
Gravitoelectromagnetism in metric f(R) and Brans-Dicke theories with a potential
Creators: name: Dass, Abhinandan
name: Liberati, Stefano
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A Gravitoelectromagnetism formalism in the context of metric f(R) theory is presented and the analogue Lorentz force law is derived. Some interesting results such as the dependence of the deviation from General Relativity on the absolute value of the scalar potential are found, it is also found that the f(R) effects are only relevant at a shorter distance or when the distance is much less than the compton wavelength, and that the effects are attractive in nature. An investigation of gravitational time delay in the context of metric f(R) is also presented showing that the Ricci scalar alone is responsible for the time delay effect which seems to suggest that the extra scalar degree of freedom associated to f(R) does not provide any modification. Also, to generalise our results, the Lorentz force law and gravitational time delay in the case of Brans-Dicke theories with a potential are derived; it is shown that the results are consistent with those obtained in the case of metric f(R) and General Relativity in the appropriate limits.
Public Participation and the New York City Title XX Planning Process: Its Perceived Impact and Efficacy
Creators: Hopkins, Thomas J.
Publisher: name: Columbia University
Year: 1982
Subjects: subject: Social service
subject: Political science
subject: FOS: Political science

description: In a democracy, the concept of citizen participation is the essence of that system: it may not be an overstatement to declare that without citizen participation there is no democracy. The concept plays an important role in the study reported here. The writer examines a major element in the implementation of Title XX of the Social Security Act in New York City. The aim is to critically assess the perceived impact of the implementation of the citizen participation process of Title XX in New York City from 1979-1981. To accomplish this task, a survey focuses on citizen participation as this was acted out during July and August 1981. The information acquired illuminates the matter of who participated in the process, why they participated and what was the perceived impact of their participation.

Citizen participation and decentralization are issues which have become salient during historical periods. Clearly during the 1960s it characterized the thrust of southern blacks who demanded greater respect for their voting rights. It also had its echo in the cry for community control of schools in Brooklyn. There is no doubt that the concept of citizen participation was on the national agenda. By 1975 it was not clear if the two concepts, citizen participation and decentralization, had the same meaning as they did during the 1960s.

This study investigates the New York City Title XX citizen participation process, in general, the public hearings in particular. A total sample population of (47) made up of public officials (9), voluntary organization leaders (26), and community based advisory chairpersons (12) was examined through the use of quantitative and qualitative methodology. All respondents were interviewed, the interviews were tape recorded, the tapes were codified and a quotation bank was developed.

The findings suggest that a strong ambivalence tone is present. This perception transcends both the respondents' classification and race. On the manifest or decision making level the process was perceived as not efficacious. However, on the latent level long run benefits are viewed as a possibility. While the ambivalence, quantitatively, transcended race; qualitatively the black and white ambivalence appears to emerge from different perspectives.

In sum, this study shed some light on the Title XX citizen participation process from the point of view of those actively involved.
Sporobolus macranthelus Chiov.
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
Liliopsida
Poales
Poaceae
Sporobolus
Sporobolus macranthelus

description: Sporobolus macranthelus Chiov.  —
Habit: Herb.
Habitat: LMWF, LMDF; up to 2 500 m. Distribution: II.
 Voucher: Meru, Alt. 1 585 m, 24 Feb. 1970, Senyimba 285 (EA).
 References: Clayton et al. (1974a), 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 40, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464