cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
DEVELOPMENT OF ORGANIZATIONAL AND INFORMATION COMPONENT OF INFRASTRUCTURAL SUPPORT OF FUNCTIONING OF AGRICULTURAL ENTERPRISES IN UKRAINE
Creators: name: Нarbar Zh.
Publisher: name: Norwegian Journal of Development of the International Science
Year: 2020
Subjects: infrastructure
agricultural enterprise
elevator
logistics
service cooperative
chamber of commerce and industry

description: The article analyzes the organizational and informational component of the infrastructural support of the functioning of agricultural enterprises in Ukraine. The functions of the infrastructure of functioning of agricultural enterprises are clarified. The subjects of infrastructure of functioning of agrarian enterprises are characterized. The main obstacles to the development of agricultural logistics have been identified. The role of the Chamber of Commerce and Industry in Ukraine as a platform for the formation of business relations and communications is considered. The problems of development of the organizational and information component of the infrastructure of agricultural enterprises have been clarified.
Dienstorientierte Sensornetze: Programmierabstraktionen und Dienstkomposition
Creators: name: Hurler, Bernhard Alexander
Publisher: name: Karlsruhe
Year: 2012
Subjects: dienstorientierte Sensornetze
modusbasierte Kommunikation

description: In dieser Arbeit wird eine Programmierabstraktion für dienstorientierte Sensornetze entwickelt. Einfache Dienste können zu turingmächtigen Anwendungen komponiert werden, die aufgrund des deklarativen Charakters fortlaufend nach aktuellen Umgebungsbedingungen optimiert werden können. Im zweiten Teil wird eine modusbasierte Optimierung der Kommunikation in Sensornetzen entwickelt. Nach Bedarf kann das Sensornetz auf energiesparende, schnelle oder robuste Kommunikationmodi umgeschaltet werden.
THE PUBLIC INVESTMENT ADMINISTRATION: COMPONENTS OF DIAGNOSTIC TOOLS
Creators: name: Gryshkevych, O.
Publisher: name: Norwegian Journal of Development of the International Science
Year: 2020
Subjects: public infrastructure investments
project life cycle
quality assessment of investment administration
diagnostic tools
investment management efficiency index
public investments

description: The purpose of the study is to determine the components of the tools of public investment administration based on the analysis of the development of methodology for assessing the quality and effectiveness of public investment administration over the past 20 years. The study found that since the 2000s, international organizations have developed and put into practice a number of tools for assessing the quality of public investment management, based on project life cycle assessment, integration of public infrastructure investment into the budget cycle, the formation of national indices (ratings) of efficiency public investment. Diagnostic tools can be used to determine the necessary measures to transform management to a qualitative level. However, the components of administration related to the areas of government regulation should not be overlooked as they may cause additional risks and losses.
Nekrasov prepotential with fundamental matter from the quantum spin chain
Creators: name: Zenkevich, Yegor
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Nekrasov functions were conjectured in \cite{Mironov:2009uv} to be related to exact Bohr-Sommerfeld periods of quantum integrable systems. This statement was thoroughly checked for the case of the pure $SU(N_c)$ gauge theory in \cite{Mironov:2009dv} and \cite{Popolitov:2010bz}. Here we successfully perform a set of checks in the case of gauge group $SU(N_c)$ with additional $N_f$ fundamental hypermultiplets. We show that the Baxter equation for the spin chain gives the same quantum periods as the one for the Gaudin system in this case.
description: 13 pages, 1 figure, added reference
Applications of 2D and 3D full waveform tomography in acoustic and viscoacoustic complex media
Creators: name: Kurzmann, André
Publisher: name: Karlsruhe
Year: 2012
Subjects: seismic imaging
time domain
acoustic
full waveform tomography

description: Full waveform tomography (FWT) is a high-resolution imaging method to exploit the full richness of recorded waveforms. It is able to resolve subsurface structures smaller than a wavelength. In this work I developed 2D and 3D time-domain implementations of acoustic FWT including its optimization with respect to methodological and technical aspects. I accomplished several synthetic feasibility studies with applications to seismic data computed in cross-well or reflection experiments.
Measurement of the three-jet mass cross-section at 7 TeV
Creators: name: Stober, Fred Markus
Publisher: name: Karlsruhe
Year: 2012
Subjects: QCD
LHC
CMS
3-Jet Masse
Starke Kopplung

description: This study presents a measurement of the double-differential cross section of 3-jet events at 7 TeV with 5/fb of data collected by CMS. The cross section is measured as a function of the invariant mass and maximum rapidity of the 3-jet system and is unfolded for detector effects. A comparison between the data and NLO theory is performed and the running of the strong coupling is confirmed
Progress towards a primary pressure standard with cold atoms
Creators: name: Jooya, Kais
Publisher: name: University of British Columbia
Year: 2017

description: This thesis describes a method of using an ultra-cold ensemble of atoms confined in a trap as an atomic primary pressure standard. The development of the standard and its current status are described in detail. This standard uses a 3D MOT to trap ⁸⁷Rb and then transfer them to a quadrupole magnetic trap where the atoms undergoes collisions with a background gas. By measuring the number of atoms left in the magnetic trap as a function of time one extract a loss rate and from this rate determine the background gas density. This loss rate is a product of the density of the background, multiplied by the loss cross section averaged over the velocity distribution of the background gas. By computing the average loss cross section in the magnetic trap and measuring the loss rate, the density of the background gas can be determined. This gives a calibration free measurement of density of a background gas in the UHV range (10-⁶ ‑ 10-⁹) Torr or (10-⁴ - 10-⁷) Pa which allows for it to be used as a standard. In conjunction with this, preparation of the atoms prior to the loss rate measurement is investigated to ensure accuracy and reproducibility of the standard. Finally a comparison between UBC's atomic standard and NIST's (National Institute for Standards and Technology) orifice flow standard is conducted via an ionization gauge which employed as a transfer standard.All measurement are carried out using Argon gas as the background gas of study.
Zum Einfluss von Fahrzeug- und Straßenparametern auf die Ausbildung von Straßenunebenheiten
Creators: name: Vogt, Heike
Publisher: name: Karlsruhe
Year: 2012
Subjects: Fahrzeug-Straße-Interaktion
Längsunebenheiten
bleibende Verformung
Fahrzeugschwingungen
Parametereinfluss

description: Die vorliegende Arbeit untersucht den Einfluss unterschiedlicher Fahrzeug- und Straßenparameter auf die Ausbildung von longitudinalen Straßenunebenheiten. Hierzu wird ein abstrahiertes Fahrzeugmodell zur Abbildung der Vertikaldynamik von Lkw formuliert sowie ein phänomenologisches Gesetz zur Berechnung der bleibenden Straßenverformung verwendet. Mithilfe von analytischen und semianalytischen Methoden wird die Entwicklung einzelner Spektralanteile der Straßenoberfläche prognostiziert.
Formal Semantics of Model Fields in Annotation-based Specifications
Creators: name: Beckert, Bernhard
name: Bruns, Daniel
Publisher: name: Karlsruhe
Year: 2012

description: It is widely recognized that abstraction and modularization are indispensable for specification of real-world programs. In source-code level program specification and verification, model fields are a common means for those goals. However, it remains a challenge to provide a well-founded formal semantics for the general case in which the abstraction relation defining a model field is non-functional.
In this paper, we discuss and compare several possibilities for defining model field semantics, and we give a complete formal semantics for the general case. Our analysis and the proposed semantics is based on a generalization of Hilbert's epsilon terms.
Modeling scale-dependent bias on the baryonic acoustic scale with the statistics of peaks of Gaussian random fields
Creators: name: Desjacques, Vincent
name: Crocce, Martin
name: Scoccimarro, Roman
name: Sheth, Ravi K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Models of galaxy and halo clustering commonly assume that the tracers can be treated as a continuous field locally biased with respect to the underlying mass distribution. In the peak model pioneered by BBKS, one considers instead density maxima of the initial, Gaussian mass density field as an approximation to the formation site of virialized objects. In this paper, the peak model is extended in two ways to improve its predictive accuracy. Firstly, we derive the two-point correlation function of initial density peaks up to second order and demonstrate that a peak-background split approach can be applied to obtain the k-independent and k-dependent peak bias factors at all orders. Secondly, we explore the gravitational evolution of the peak correlation function within the Zel'dovich approximation. We show that the local (Lagrangian) bias approach emerges as a special case of the peak model, in which all bias parameters are scale-independent and there is no statistical velocity bias. We apply our formulae to study how the Lagrangian peak biasing, the diffusion due to large scale flows and the mode-coupling due to nonlocal interactions affect the scale dependence of bias from small separations up to the baryon acoustic oscillation (BAO) scale. For 2-sigma density peaks collapsing at z=0.3, our model predicts a ~ 5% residual scale-dependent bias around the acoustic scale that arises mostly from first-order Lagrangian peak biasing (as opposed to second-order gravity mode-coupling). We also search for a scale dependence of bias in the large scale auto-correlation of massive halos extracted from a very large N-body simulation provided by the MICE collaboration. For halos with mass M>10^{14}Msun/h, our measurements demonstrate a scale-dependent bias across the BAO feature which is very well reproduced by a prediction based on the peak model.
description: (v1): 23 pages text, 8 figures + appendix (v2): typos fixed, references added, accepted for publication in PRD
Integration von Messdaten in die Simulation zur multikriteriellen, zeiteffizienten versuchsbasierten Optimierung technischer Systeme = Integration of measurement data in the simulation for the multicriteria time-efficient testbased optimization of technical systems
Creators: name: Schwarz, Alexander
Publisher: name: Karlsruhe
Year: 2013
Subjects: X-in-the-Loop(XiL)

description: This draft presents a part of the operation system, which combines simulationmodels and the testbased optimization. Thereby, test data are used to parameterise physical model structures. Afterwards these physical models are used for the optimization of the design parameters. The advantage of this approach is that also parameters, which can only be changed slowly during a test, can be optimized with the help of the simulation models.
Should I stay or should I go? : assessing range stasis versus range shifts of plants in the North Cascades
Creators: name: Wilson, Rachel
Publisher: name: University of British Columbia
Year: 2017

description: Under the pressure of anthropogenic climate change, species that are negatively impacted must rapidly respond or risk extirpation. The most immediate option for many species will be to track changing distributions of suitable habitat. Comparisons of contemporary data to historical baseline data indicate that climate change has already altered ranges and abundances of numerous species. Though general patterns are slowly emerging, there is still considerable variation in responses among species. Further, a number of species do not appear to be undergoing any change in their distributions or abundances, despite possible fitness costs of stasis. Given this variation, mechanisms underlying whether species shift or do not shift must be elucidated to allow for the creation of a predictive framework that can be extended to other systems. One way to achieve this end is to associate species functional traits with their magnitude of response. To detect elevational range shifts and changes in abundance of plant species, I and a team of surveyors resurveyed historical vegetation plots in North Cascades National Park. Since the original 1983 survey, the area has warmed by approximately 0.8 ⁰ C. I then tested whether variation in range shifts among species could be associated with functional traits. Overall, most species exhibited range stasis. Of the species that initially appeared to exhibit a range shift, more than half were eliminated after accounting for fires and differences in survey effort between years. Species tended to decrease in abundance within their range, though this trend was often not significant. Predictions from trait models were inconsistent, depending on the modeling framework, the metric used for range shifts, and the inclusion of an outlying species. Range stasis was likely driven by dispersal limitation, but may have also resulted from acclimation, slow demographic processes, microclimate buffering of atmospheric temperatures by landscape features, or some combination of these and other factors. The variation in the degree of range shifts could not be explained satisfactorily by functional traits, casting doubt on their use in a general framework to predict future responses.
Synthesis and Characterization of Polymers with Phosphorus Side Chains
Creators: name: Eisenblätter, Jördis
Publisher: name: Karlsruhe
Year: 2013
Subjects: Living Polymerizations
Phosphorus Polymers
Flame-Retardancy

description: The development of novel (co)polymers with phosphorylated side chains via two different controlled/living polymerization approaches (RAFT, ROP) and their evaluation in terms of their flame retardant potential are reported. In this context, various alkyne phosphoric esters and phosphorylated epoxy monomers are developed via a novel synthetic route. To evaluate the flame retardant potential the polymeric flame retardant is integrated into various polymer systems and tested on the laboratory scale.
Organic spintronics: an investigation on spin-crossover complexes from isolated molecules to the device
Creators: name: Davesne, Vincent
Publisher: name: Karlsruhe
Year: 2013
Subjects: Organic spintronics
spin-crossover
Fe(phen)2(NCS)2
X-ray absorption
SOXIESST

description: Fe(phen)2(NCS)2 and Fe{[3,5-dimethylpyrazolyl]3BH}2 samples deposited by thermal evaporation on Cu(100), Co(100) and SiO2 substrates were studied, and compared with powder. The SOXIESST dynamic aspects were studied. Single molecule were switched by voltage pulses, if we reduce the influence of the substrate. Thin films exhibit a weaker cooperativity and modified transition temperature. Finally, we build Au/Fe-phen/Au vertical devices. They present notably a 'diode' effect at the spin transition.
Ein techno-ökonomisches Modell zur Netzplanung unter Berücksichtigung regulierter Netzentgelte - Ein integrierter Ansatz im Rahmen der wertorientierten Unternehmensführung am Beispiel der 110-kV-Verteilnetzebene
Creators: name: Schnabel, Stefan
Publisher: name: Karlsruhe
Year: 2013
Subjects: Netzplanung
Regulierung

description: Um Effizienzpotentiale in Stromübertragungs- und -verteilnetzen nutzbar zu machen, werden seit einigen Jahren optimierende Energiesystemmodelle für die Netzplanung entwickelt. Die vorliegende Arbeit erweitert die bisherigen ausgabenorientierten Optimierungsansätze um eine auf den Wert des Eigenkapitals ausgerichtete Bewertungsperspektive. Dabei werden die Erlöse aus regulierten Netzentgelten (u.a. nach der Stromnetzentgelt- und Anreizregulierungsverordnung) in der Bewertung berücksichtigt.
Noncommutative spectral geometry, algebra doubling and the seeds of quantization
Creators: name: Sakellariadou, Mairi
name: Stabile, Antonio
name: Vitiello, Giuseppe
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A physical interpretation of the two-sheeted space, the most fundamental ingredient of noncommutative spectral geometry proposed by Connes as an approach to unification, is presented. It is shown that the doubling of the algebra is related to dissipation and to the gauge structure of the theory, the gauge field acting as a reservoir for the matter field. In a regime of completely deterministic dynamics, dissipation appears to play a key role in the quantization of the theory, according to 't Hooft's conjecture. It is thus argued that the noncommutative spectral geometry classical construction carries implicit in its feature of the doubling of the algebra the seeds of quantization.
description: 12 pages; amended version to match publication in PRD
Informationsfusion für die kooperative Umfeldwahrnehmung vernetzter Fahrzeuge
Creators: name: Tischler, Karin
Publisher: name: Karlsruhe
Year: 2013
Subjects: Kooperative Fahrzeuge
Negative Sensorevidenz
Informationsfusion

description: Kooperative Fahrzeugentscheidungen erfordern eine gemeinsame, konsistente Wahrnehmung. Dazu werden Fusionsmethoden für kommunizierte Eigen- und Umfeldinformationen entwickelt und erprobt. Die Registrierung in gemeinsame Koordinaten erfolgt nach Lokalisierung durch fusionierte GPS- und Koppelnavigationsdaten. Die dezentrale Fusion kombiniert rekursive Multi-Objekt-Verfolgung und gitterbasierte Karte. So können negative Sensorevidenzen beschrieben und Inkonsistenzen plausibilisiert werden.
Dynamics of magnetic charges in artificial spin ice
Creators: name: Mellado, Paula
name: Petrova, Olga
name: Shen, Yichen
name: Tchernyshyov, Oleg
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Artificial spin ice has been recently implemented in two-dimensional arrays of mesoscopic magnetic wires. We propose a theoretical model of magnetization dynamics in artificial spin ice under the action of an applied magnetic field. Magnetization reversal is mediated by domain walls carrying two units of magnetic charge. They are emitted by lattice junctions when the the local field exceeds a critical value $H_c$ required to pull apart magnetic charges of opposite sign. Positive feedback from Coulomb interactions between magnetic charges induces avalanches in magnetization reversal.
description: Revised version in response to referee comments, references added
TURIZM INDUSTRIYASIDA XALQARO MEHMONXONALAR TIZIMINING RIVOJLANISH TENDENSIYALARI
Creators: name: Xojiakbarova, Gulyora
name: Teshabayeva, Odina
Publisher: name: Zenodo
Year: 2023

description: Ushbu maqolada jahon amaliyotida turizm industriyasida xalqaro mexmonxonalar  ko'p bosqichli tizim sifatida organib chiqilgan. Turizm moddiy va nomoddiy mahsulotlar xizmatlar ishlab chiqaruvchi tashkilotlarni birlashtirgan iqtisodiy faoliyatning o'ziga xos va ko'p qirrali sohasi hisoblanadi
On the relation between virial coefficients and the close-packing of hard disks and hard spheres
Creators: name: Maestre, Miguel Ángel G.
name: Santos, Andrés
name: Robles, Miguel
name: de Haro, Mariano López
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The question of whether the known virial coefficients are enough to determine the packing fraction $η_\infty$ at which the fluid equation of state of a hard-sphere fluid diverges is addressed. It is found that the information derived from the direct Padé approximants to the compressibility factor constructed with the virial coefficients is inconclusive. An alternative approach is proposed which makes use of the same virial coefficients and of the equation of state in a form where the packing fraction is explicitly given as a function of the pressure. The results of this approach both for hard-disk and hard-sphere fluids, which can straightforwardly accommodate higher virial coefficients when available, lends support to the conjecture that $η_\infty$ is equal to the maximum packing fraction corresponding to an ordered crystalline structure.
description: 10 pages, 6 figures; v2: discussion about hard-square and hard-hexagon systems on a lattice added; five new references
Bewertung von langfaserverstärkten Kunststoff-Metall-Hybridverbunden auf der Basis des Verformungs- und Versagensverhaltens
Creators: name: Paul, Hanna
Publisher: name: Karlsruhe
Year: 2013
Subjects: Kunststoff-Metall-Hybridverbunde
langfaserverstärkte Thermoplaste (LFT)
Bewertung
Experiment
Simulation

description: Es werden weiterentwickelte integrativ gefertigte langfaserverstärkte Kunststoff-Metall-Hybridverbunde untersucht. Zusätzlich zur heute typischen Kraftübertragung zwischen Kunststoff und Metall mit Kraftschluss und Formschluss, werden Verbindungen mit Stoffschluss und kombinierte Verbindungen betrachtet. Mit experimentellen und numerischen Arbeiten wurde ein "Bewertungstool" für die Auswahl und Optimierung geeigneter Kombinationen entwickelt.
Mixing-induced Spontaneous Supersymmetry Breaking
Creators: name: Capolupo, Antonio
name: Di Mauro, Marco
name: Iorio, Alfredo
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is conjectured that flavor mixing furnishes a universal mechanism for the spontaneous breaking of supersymmetry. The conjecture is proved explicitly for the mixing of two Wess--Zumino $\mathcal{N}=1$ supermultiplets and arguments for its general validity are given. The mechanism relies on the fact that, despite mixing treats fermions and bosons symmetrically, both the fermionic and the bosonic zero point energies are shifted by a positive amount and this kind of shift does not respect supersymmetry.
description: 5 pages, 1 figure, Eq(12) of V1 corrected to Eq(22), explicit off-shell formulation included, one reference added
Security proof of Counterfactual Quantum Cryptography against General Intercept-resend Attacks and Its Vulnerability
Creators: name: Zhang, Sheng
name: Wang, Jian
name: Tang, Chao-jing
name: Zhang, Quan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Counterfactual quantum cryptography (CQC), recently proposed by Noh, is featured with no transmission of signal particles. This exhibits evident security advantage, such as its immunity to the well known PNS attack. In this paper, the theoretical security of CQC protocol against the general intercept-resend attacks is proved by bounding the information of an eavesdropper Eve more tightly than in Yin's proposal[Phys. Rev. A 82, 042335 (2010)]. It is also showed that practical CQC implementations may be vulnerable when equipped with imperfect apparatuses, by proving that a negative key rate can be achieved when Eve launches a time-shift attack based on imperfect detector efficiency.
description: 14 pages, 4 figures
Atmosphere and Spectral Models of the Kepler-Field Planets HAT-P-7b and TrES-2
Creators: name: Spiegel, David S.
name: Burrows, Adam
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We develop atmosphere models of two of the three Kepler-field planets that were known prior to the start of the Kepler mission (HAT-P-7b and TrES-2). We find that published Kepler and Spitzer data for HAT-P-7b appear to require an extremely hot upper atmosphere on the dayside, with a strong thermal inversion and little day-night redistribution. The Spitzer data for TrES-2 suggest a mild thermal inversion with moderate day-night redistribution. We examine the effect of nonequilibrium chemistry on TrES-2 model atmospheres and find that methane levels must be adjusted by extreme amounts in order to cause even mild changes in atmospheric structure and emergent spectra. Our best-fit models to the Spitzer data for TrES-2 lead us to predict a low secondary eclipse planet-star flux ratio (~2 x 10^-5) in the Kepler bandpass, which is consistent with what very recent observations have found. Finally, we consider how the Kepler-band optical flux from a hot exoplanet depends on the strength of a possible extra optical absorber in the upper atmosphere. We find that the optical flux is not monotonic in optical opacity, and the non-monotonicity is greater for brighter, hotter stars.
description: Figures, references, and text slightly updated. Accepted by ApJ
Twist operators in N=4 beta-deformed theory
Creators: name: de Leeuw, Marius
name: Lukowski, Tomasz
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we derive both the leading order finite size corrections for twist-2 and twist-3 operators and the next-to-leading order finite-size correction for twist-2 operators in beta-deformed SYM theory. The obtained results respect the principle of maximum transcendentality as well as reciprocity. We also find that both wrapping corrections go to zero in the large spin limit. Moreover, for twist-2 operators we studied the pole structure and compared it against leading BFKL predictions.
description: 17 pages; v2: minor changes, references added
Auslegung und Optimierung gehäuseloser Radialventilatoren
Creators: name: Ratter, Heiko
Publisher: name: Karlsruhe
Year: 2013
Subjects: Strömungsmaschine
Ventilator
CFD
RANS
Optimierung

description: Im Rahmen der vorliegenden Arbeit wird ein numerisches Verfahren zur Auslegung und Optimierung gehäuseloser Radialventilatoren erarbeitet. Dabei werden klassische Entwurfsmethoden mit komplexeren Methoden der numerischen Strömungssimulation und analytischen Optimierungsalgorithmen kombiniert.
An adaptive higher-order unstructured finite volume solver for turbulent compressible flows
Creators: name: Jalali, Alireza
Publisher: name: University of British Columbia
Year: 2017

description: The design of aircraft depends increasingly on the use of Computational Fluid Dynamics (CFD) in which numerical methods are employed to obtain approximate solutions for fluid flows. One route to improve the numerical accuracy of CFD simulations is higher-order discretization methods. Moreover, finite volume discretizations are the method of choice in commercial CFD solvers and also in computational aerodynamics because of intrinsic conservative and shock-capturing properties. Considering that nearly all practical flows with aerodynamic applications are classified as turbulent, we develop a higher-order finite volume solver for the Reynolds Averaged Navier-Stokes (RANS) solution of turbulent compressible flows on unstructured meshes. Higher-order flow solvers must account for boundary curvature. Since turbulent flow simulations require anisotropic cells in shear layers, we use an elasticity analogy to project the boundary curvature into the interior faces and prevent faces from intersecting near curved boundaries. Furthermore, we improve the accuracy of solution reconstruction and output quantities on highly anisotropic cells with curvature using a local curvilinear coordinate system. A robust turbulence model for higher-order discretizations is fully coupled to the system of RANS equations and an efficient solution strategy is adopted for the convergence to the steady-state solution. We present our higher-order results for simple and complicated configurations in two dimensions. These results are verified by comparison against well-established numerical and experimental values in the literature. Our results show the advantages of higher-order methods in obtaining a more accurate solution with fewer degrees of freedom and also fast and efficient convergence to the steady-state solutions. Moreover, we propose an hp-adaptation algorithm for the unstructured finite volume solver based on residual-based and adjoint-based error indicators. In this approach, we enhance the local accuracy of the discretization via h-refinement or p-enrichment based on the smoothness of the solution. Mesh refinement is carried out by local cell division and introducing non-conforming interfaces in the mesh while order enrichment is obtained by local increase of the polynomial order in the reconstruction process. Our results show that this strategy leads to accuracy and efficiency improvements for several types of compressible flow problems.
Polarized 3He as a probe for short-range spin-dependent interactions
Creators: name: Petukhov, A. K.
name: Pignol, G.
name: Jullien, D.
name: Andersen, K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We have studied the relaxation of a spin-polarized gas in a magnetic field, in the presence of short-range spin-dependent interactions. As a main result we have established a link between the specific properties of the interaction and the dependence of the spin-relaxation rate on the magnitude of the holding magnetic field. This allows us to formulate a new, extremely sensitive method to study (pseudo-) magnetic properties at the sub-millimeter scale, which are difficult to access by other means. The method has been used as a probe for nucleon-nucleon axion-like P,T violating interactions which yields a two-order-of-magnitude improved constraint on the coupling strength ($g_s g_p$) as a function of the force range ($λ$): $g_s g_p λ^2 < 3 \times 10^{-27}$ m$^2$.
Nonlinear properties and stabilities of polaritonic crystals beyond the low-excitation-density limit
Creators: name: Sedov, E. S.
name: Alodjants, A. P.
name: Arakelian, S. M.
name: Lin, Y. Y.
name: Lee, R. -K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Coherent properties of a two dimensional spatially periodic structure - polaritonic crystal (PolC) formed by trapped two-level atoms in an optical cavity array interacting with a light field, are analyzed. By considering the wave function overlapping both for photonic and atomic states, a cubic-quintic complex nonlinear Schrodinger equation (CNLSE) is derived for the dynamics of coupled atom-light states - wave function of low branch (LB) polaritons, associated with PolC in the continuous limit. The variational approach predicts that a stable ground state wave function of PolC exists but is accompanied by an oscillating width. For a negative scattering length, the wave function collapses in the presence of a small quintic nonlinearity appear due to a three body polariton interaction. Studying non-equilibrium (dissipative) dynamics of polaritons with adiabatic approximation we have shown that the collapse of PolC wave function can be prevented even in the presence of small decaying of a number of polariton particles.
description: 12 pages, 8 figures
Exact Hawking Radiation of Scalars, Fermions, and Bosons Using the Tunneling Method Without Back-Reaction
Creators: name: Yale, Alexandre
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Hawking radiation is studied for arbitrary scalars, fermions, and spin-1 bosons, using a tunneling approach, to every order in $\hbar$ but ignoring back-reaction effects. It is shown that the additional quantum terms yield no new contribution to the Hawking temperature. Indeed, it is found that the limit of small $\hbar$ in the standard quantum WKB approximation is replaced by the near-horizon limit in the gravitational WKB approach.
description: 8 pages, no figures. v3: Introduction updated. Version to appear in PLB
Transformations between 2MASS, SDSS and BVI photometric systems for late-type giants
Creators: name: Yaz, E.
name: Bilir, S.
name: Karaali, S.
name: Ak, S.
name: Coskunoglu, B.
name: Cabrera-Lavers, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present colour transformations from Two Micron All Sky Survey (2MASS) photometric system to Johnson-Cousins system and to Sloan Digital Sky Survey (SDSS) system for late-type giants and vice versa. The giant star sample was formed using surface gravity constraints ($2 < \log g \leq 3$) to Cayrel de Strobel et al.\rq s (2001) spectroscopic catalogue. 2MASS, SDSS and Johnson-Cousins photometric data was taken from Cutri et al. (2003), Ofek (2008) and van Leeuwen (2007), respectively. The final sample was refined applying the following steps: (1) the data were dereddened, (2) the sample stars selected are of the highest photometric quality. We give two--colour dependent transformations as a function of metallicity as well as independent of metallicity. The transformations provide absolute magnitudes and distance determinations which can be used in space density evaluations at relatively short distances where some or all of the SDSS magnitudes of late-type giants are saturated.
description: The variables and "f" parameters in the equations 15-17 and 27-29 were changed
Resolvents and Seiberg-Witten representation for Gaussian beta-ensemble
Creators: name: Mironov, A.
name: Morozov, A.
name: Popolitov, A.
name: Shakirov, Sh.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The exact free energy of matrix model always obeys the Seiberg-Witten (SW) equations on a complex curve defined by singularities of the quasiclassical resolvent. The role of SW differential is played by the exact one-point resolvent. We show that these properties are preserved in generalization of matrix models to beta-ensembles. However, since the integrability and Harer-Zagier topological recursion are still unavailable for beta-ensembles, we need to rely upon the ordinary AMM/EO recursion to evaluate the first terms of the genus expansion. Consideration in this paper is restricted to the Gaussian model.
description: 15 pages
Dust-driven wind from disk galaxies
Creators: name: Sharma, Mahavir
name: Nath, Biman B.
name: Shchekinov, Yuri
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study gaseous outflows from disc galaxies driven by radiation pressure on dust grains. We include the effect of bulge and dark matter halo and show that the existence of such an outflow implies a maximum value of disc mass-to-light ratio. We show that the terminal wind speed is proportional to the disc rotation speed in the limit of a cold gaseous outflow, and that in general there is a contribution from the gas sound speed. Using the mean opacity of dust grains and the evolution of the luminosity of a simple stellar population, we then show that the ratio of the wind terminal speed ($v_\infty$) to the galaxy rotation speed ($v_c$) ranges between $2 \hbox{--} 3$ for a period of $\sim 10$ Myr after a burst of star formation, after which it rapidly decays. This result is independent of any free parameter and depends only on the luminosity of the stellar population and on the relation between disc and dark matter halo parameters. We briefly discuss the possible implications of our results.
description: 5 pages, 3 figures, ApJ Letters (typos corrected)
A High-Resolution Human Contact Network for Infectious Disease Transmission
Creators: name: Salathé, Marcel
name: Kazandjieva, Maria
name: Lee, Jung Woo
name: Levis, Philip
name: Feldman, Marcus W.
name: Jones, James H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Medical Physics (physics.med-ph)
subject: Physics and Society (physics.soc-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The most frequent infectious diseases in humans - and those with the highest potential for rapid pandemic spread - are usually transmitted via droplets during close proximity interactions (CPIs). Despite the importance of this transmission route, very little is known about the dynamic patterns of CPIs. Using wireless sensor network technology, we obtained high-resolution data of CPIs during a typical day at an American high school, permitting the reconstruction of the social network relevant for infectious disease transmission. At a 94% coverage, we collected 762,868 CPIs at a maximal distance of 3 meters among 788 individuals. The data revealed a high density network with typical small world properties and a relatively homogenous distribution of both interaction time and interaction partners among subjects. Computer simulations of the spread of an influenza-like disease on the weighted contact graph are in good agreement with absentee data during the most recent influenza season. Analysis of targeted immunization strategies suggested that contact network data are required to design strategies that are significantly more effective than random immunization. Immunization strategies based on contact network data were most effective at high vaccination coverage.
title: Data‐based prediction of the viscoelastic behavior of short fiber reinforced composites
Creators: name: Marr, Julian
name: Zartmann, Lukas
name: Reinel-Bitzer, Doris
name: Andrä, Heiko
name: Müller, Ralf
Publisher: name: Wiley-VCH
Year: 2023

description: The viscoelastic behavior of short fiber reinforced polymers (SFRPs) partly depends on different microstructural parameters such as the local fiber orientation distribution. To account for this by simulation on component level, two‐scale methods couple simulations on the micro‐ and macroscale, which involve considerable computational costs. To circumvent this problem, the generation of a viscoelastic surrogate model is presented here. For that purpose, an adaptive sampling technique is investigated and data are obtained by creep simulations of representative volume elements (RVEs) using a fast Fourier transform (FFT) based homogenization method. Numerical tests confirm the high accuracy of the surrogate model. The possibility of using that model for efficient material optimization is shown.
Goldstini as the decaying dark matter
Creators: name: Cheng, Hsin-Chia
name: Huang, Wei-Chih
name: Low, Ian
name: Menon, Arjun
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a new scenario for supersymmetric decaying dark matter without R-parity violation in theories with goldstini, which arise if supersymmetry is broken independently by multiple sequestered sectors. The uneaten goldstino naturally has a long lifetime and decays into three-body final states including the gravitino, which escapes detection, and two visible particles. The goldstini low-energy effective interactions are derived, which can be non-universal and allow the dark matter to be leptophilic, in contrast to the case of a single sector supersymmetry breaking. In addition, the three-body decay with a missing particle gives a softer spectrum. Consequently, it is possible to fit both the positron excess observed by the PAMELA and the total e+ + e- measurements by the Fermi-LAT using universal couplings to all three lepton flavors or 100% branching fraction into electrons/positrons, both of which are disfavored in the conventional scenario of dark matter decays into two or four visible particles without missing energy.
description: 23 pages, 4 figures; v3: plots replaced
COVID-19 and higher education in the global context: Exploring contemporary issues and challenges
Creators: name: Ammigan, R.
name: Chan, R. Y.
name: Bista, K.
Publisher: name: Zenodo
Year: 2021

description: COVID-19 and Higher Education in the Global Context: Exploring Contemporary Issues and Challenges addresses the lasting impact of the novel coronavirus (COVID-19) in the higher education sector and offers insights that inform policy and practice. Framed in a global context, this timely book captures a wide variety of topics, including student mobility, global partnerships and collaboration, student health and wellbeing, enrollment management, employability, and graduate education. Ravichandran Ammigan, Ph.D., is the Associate Deputy Provost for International Programs and an Assistant Professor of Education at the University of Delaware, Delaware, USA. Roy Y. Chan, Ph.D., is an Assistant Professor of Education and the Director of the Doctor of Education (Ed.D.) program in Leadership and Professional Practice in the Helen DeVos College of Education at Lee University, Tennessee, USA. Krishna Bista, Ed.D., is a Professor of Higher Education in the Department of Advanced Studies, Leadership and Policy at Morgan State University, Maryland, USA. Ammigan, R., Chan, R. Y., & Bista, K. (eds.) (2022). COVID-19 and higher education in the global context: Exploring contemporary issues and challenges. STAR Scholars. 
Probing dark matter models with neutrinos from the Galactic center
Creators: name: Erkoca, Arif Emre
name: Reno, Mary Hall
name: Sarcevic, Ina
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We calculate the contained and upward muon and shower fluxes due to neutrinos produced via dark matter annihilation or decay in the Galactic center. We consider dark matter models in which the dark matter particle is a gravitino, a Kaluza-Klein particle and a particle in leptophilic models. The Navarro-Frenk-White profile for the dark matter density distribution in the Galaxy is used. We incorporate neutrino oscillations by assuming maximal mixing and parametrize our results for muon and shower distributions. The muon and shower event rates and the minimum observation times in order to reach 2$σ$ detection significance are evaluated. We illustrate how observation times vary with the cone half angle chosen about the Galactic center, with the result that the optimum angles are about 10$^\circ$ and 50$^\circ$ for the muon events and shower events, respectively. We find that for the annihilating dark matter models such as the leptophilic and Kaluza-Klein models, upward and contained muon as well as showers are promising signals for dark matter detection in just a few years of observation, whereas for decaying dark matter models, the same observation times can only be reached with showers. We also illustrate for each model the parameter space probed with the 2$σ$ signal detection in five years. We discuss how the shape of the parameter space probed change with significance and the observation time.
description: 19 pages, 20 figures, 9 tables. v2: summary table added, minor typos corrected, version accepted for publication in Phys. Rev. D
Wachstum und Charakterisierung von Cu-dotiertem GaN und GaN auf MgF2
Creators: name: Ganz, Philipp Ralph
Publisher: name: Karlsruhe
Year: 2012
Subjects: Verdünnt magnetische Halbleiter
Molekularstrahlepitaxie
Gruppe-III Nitride
Photokathoden

description: Verdünnt magnetische Halbleiter sind ein wichtiger Baustein für die Spintronik. Auf Basis der Gruppe-III Nitride lieferte die Dotierung von GaN mit Cu erste vielsprechende Ansätze. In dieser Arbeit wurde die Herstellung dieses verdünnt magnetischen Halbleiters mit Molekularstrahlepitaxie untersucht und die strukturellen und magnetischen Eigenschaften für verschiedene Parameter bestimmt. Erstmalig wurde im Rahmen dieser Arbeit auch GaN auf MgF2-Substraten hergestellt und charakterisiert.
title: Opportunities for underground geological storage of CO2 in New Zealand : report CCS-08/11, monitoring and verification methodologies
Creators: name: Bannister, Stephen
name: Nicol, Andrew
name: Funnell, Robert H.
name: Etheridge, D.
name: Christenson, Bruce W.
name: Underschultz, J.
name: Caldwell, T. Grant
name: Stagpoole, Vaughan M.
name: Kepic, A.
name: Stalker, L.
Publisher: name: GNS Science
publisherIdentifier: https://ror.org/03vaqfv64
publisherIdentifierScheme: ROR
Year: 2009

description: Monitoring and Verification of carbon dioxide (CO2) stored in sub-surface rock formations will be an integral part of potential geological sequestration projects in New Zealand. Its primary purposes are to track the location of the injected CO2 plume in the subsurface and to detect any CO2 seepage from the primary seal through to the overlying strata and to provide assurance that none of the injected CO2 is reaching the ground surface (or sea bed). Information arising from Monitoring and Verification (M & V) offers a means of managing the injection process so that, for example, reservoir pressures and CO2 migration rates remain within predefined limits. Monitoring and Verification is important because it provides assurance to stakeholders that the storage process is safe, will not have detrimental impacts on the environment or existing resources, and confers a benefit to the Earth’s climate by reducing greenhouse gas emissions. Legislation will be used to ensure that these requirements are met and that risks are minimised. M & V programmes could span 20 years or more, commencing prior to injection in order to establish baseline conditions and finishing when the storage site is closed. In New Zealand these programmes are expected to be similar to those conducted overseas at Weyburn (Canada) or Otway (Australia), for example, but may differ in detail due to our geological and cultural settings. The M & V techniques best suited to CO2 storage sites in New Zealand will depend on a number of factors including the type of storage (e.g., deep saline reservoir or depleted oil and/or gas reservoir), the depth of the storage container, the location of the site (e.g., relative to population centres, environmentally valuable areas, the location of other subsurface resources (oil, gas, coal, water and geothermal), local active faults, culturally important sites and the coastline), legislative requirements, public attitudes to Carbon Capture and Storage (CCS), and the economics of these projects. As no potential storage sites have so far been selected in New Zealand this report focuses on identifying those M & V techniques that are likely to be of most use, comprising general descriptions of the main techniques (in Appendix 1), discussion of their application and recommendations outlining techniques suitable for use in New Zealand. (auth/DG)