cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Soft gluon fields and anomalous magnetic moment of muon
Creators: name: Nedelko, Sergei
name: Nikolskii, Aleksei
name: Voronin, Vladimir
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An impact of nonperturbatively-treated soft gluon modes on the value of anomalous magnetic moment of muon $a_μ$ is studied within the mean-field approach to QCD vacuum and hadronization. It is shown that radial excitations of vector mesons strongly enhance contribution of hadronic vacuum polarization to $a_μ$, doubling the contribution of one intermediate meson processes compared to result for ground state mesons. The mean field also strongly influences the hadronic light-by-light scattering contribution due to the Wilson line in quark propagators.
description: 14 pages, 8 figures, 5 tables. Discussion is amended, a figure is added
Cropland Trends Across the Nation
Creators: name: Horsfield, James
name: Landgren, Norman
name: Horsfield, James
name: Landgren, Norman
Publisher: name: Unknown
Year: 1982
Subjects: subject: Crop Production/Industries
subject: Land Economics/Use
subject: Cropland trends
subject: comparative advantage
subject: farm production regions
subject: land use
subject: land conversion

description: Global agricultural demand spurred expansion of U.S. cropland use over the last decade to a record 391 million acres in 1981, 4 million acres more than the previous record established in 1949. The contraction of cropland use after 1949 and subsequent expansion in the seventies was accompanied by major regional shifts in the pattern of agricultural land use revealed by analysis of county data over the period 1949-78. Cropland acreage increased in the Corn Belt, Delta States, Southern Plains, and Mountain regions during 1949-78, and declined in the Northeast, Appalachian, and Southeast regions. Factors such as regional comparative advantage and natural resource development triggered regional expansion and contraction of cropland use.
title: International Planning History Society Proceedings, Vol 16 No 1 (2014): Past as a guide to sustainable future
title: Past as a guide to sustainable future
titleType: AlternativeTitle
Creators: name: International Planning History Society Proceedings
Publisher: name: International Planning History Society Proceedings
Year: 2016

description: Proceedings of the 16th International Planning History Society Conference
St. Augustine, Florida, USA.
July 20-23, 2014
Conference theme: ‘Past as a guide to sustainable future’.
Convenors: Christopher Silver and Leslee F. Keys.
On the approximate relation between black-hole perturbation theory and numerical relativity
Creators: name: Islam, Tousif
name: Khanna, Gaurav
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We investigate the interplay between numerical relativity (NR) and adiabatic point-particle black hole perturbation theory (ppBHPT) in the comparable mass regime for quasi-circular non-spinning binary black holes. Specifically, we reassess the $α$-$β$ scaling technique, previously introduced by Islam et al, as a means to effectively match ppBHPT waveforms to NR waveforms within this regime. In particular, $α$ rescales the amplitude and $β$ rescales the time (and hence the phase). Utilizing publicly available long NR data (\texttt{SXS:BBH:2265}~\cite{sxs_collaboration_2019}) for a mass ratio of $1:3$, encompassing the final $\sim 65$ orbital cycles of the binary evolution, we examine the range of applicability of such scalings. We observe that the scaling technique remains effective even during the earlier stages of the inspiral. Additionally, we provide commentary on the temporal evolution of the $α$ and $β$ parameters and discuss whether they can be approximated as constant values. Consequently, we derive the $α$-$β$ scaling as a function of orbital frequencies and demonstrate that it is equivalent to a frequency-dependent correction. We further provide a brief comparison between post-Newtonian (PN) waveforms and the rescaled ppBHPT waveform at a mass ratio of $q=3$ and comment on their regime of validity. Finally, we explore the possibility of using PN theory to obtain the $α$-$β$ calibration parameters and still provide a rescaled ppBHPT waveform that matches NR.
description: 14 pages, 11 figures, Phys. Rev. D 108, 124046
Leia bimaculata
Creators: name: El Mouden, Mohamed Amin
name: Chandler, Peter J.
name: Saidoun, Imane
name: Driauach, Ouafaa
name: Belqat, Boutaïna
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Mycetophilidae
Leia
Leia bimaculata

description: Leia bimaculata (Meigen, 1804)
Material examined.
Morocco – Middle Atlas Region • 1 ♂; Forêt Bouhayati; 19/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2438 • 2 ♂♂; Forêt gouffre Friouato; 19/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2439 • 1 ♂; Gouffre Izora; 19/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2440 • 1 ♂; Grotte Bouslama; 19/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2441 • 1 ♂; Vallée des oiseaux; 19/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2442 • 3 ♂♂; Grotte Bouhayati; 20/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2443 • 1 ♂; Pont Oued Lek’hal; 20/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2444 • 1 ♂; Ruisseau Aïn Chabab; 20/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2445 • 1 ♂; Oued Tametrhouste; 21/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2446 • 1 ♂; Forêt Admam; 22/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2447.
North African distribution.
Algeria (Burghele-Balacesco 1972); Morocco (Chandler et al. 2006; Banamar et al. 2020).
description: Published as part of El Mouden, Mohamed Amin, Chandler, Peter J., Saidoun, Imane, Driauach, Ouafaa & Belqat, Boutaïna, 2025, A new species of Docosia Winnertz, 1864 and new records of fungus gnats (Diptera, Bolitophilidae, Keroplatidae and Mycetophilidae) from North Africa, pp. 349-379 in ZooKeys 1233 on pages 349-379, DOI: 10.3897/zookeys.1233.130502
Cross Layer Implementation of Key Establishment and Configuration Protocols in WSN
Creators: name: Sağlam, Özgür
name: Dalkiliç, Mehmet Emin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences
subject: C.2.1
subject: 68M99

description: Security in Wireless Sensor Networks (WSN) can be achieved by establishing shared keys among the neighbor sensor nodes to create secure communication links. The protocol to be used for such a pairwise key establishment is a key factor determining the energy to be consumed by each sensor node during the secure network configuration. On the other hand, to achieve the optimum network configuration, nodes may not need to establish pairwise keys with all of their neighbors. Because, links to be established are defined by the network configuration protocol and as long as the network connectivity requirements are satisfied, number of links to be secured can be limited accordingly. In this sense, key establishment and network configuration performances are related to each other and this cross relation should be taken into consideration while implementing security for WSN. In this paper, we have investigated the cross layer relations and performance figures of the selected randomized pre-distribution and public key based key establishment protocols with the configuration protocol we proposed in a separate publication. Simulation results indicate that total network configuration energy cost can be reduced by reducing the number of links to be secured without affecting the global network connectivity performance. Results also show that the energy and resilience performances of the public key establishment can be better than the key pre-distribution for a given set of network configuration parameters.
description: 16 pages, 12 figures
Markerless 3D reconstruction of temporally deforming surfaces from multiple cameras
Creators: name: Bradley, Derek
Publisher: name: University of British Columbia
Year: 2010

description: 3D content generation is a major challenge in computer graphics, and generating realistic objects with time-varying shape and motion is a big part of creating realistic virtual environments. An attractive approach for generating content is to acquire the shape of real objects using computer vision techniques. Capturing the real world avoids the complexity of mathematical simulation as well as the time-consuming and difficult process of creating content manually. Traditional acquisition methods, such as range scanning, work well for static objects. However, temporally deformable objects like garments and human faces pose greater challenges. Here, the capture process must reconstruct both the time-varying shape as well as the motion of the object. Additionally, per-frame texture maps should be acquired for realistic rendering. Previous methods contain various limitations, such as the use of structured illumination patterns, or hand-placed markers on the surface in order to guide the reconstruction. Placing markers on garments limits the types of garments that can be captured. Both markers and structured light on human faces limit the ability to capture high-quality per-frame texture maps, which are essential for reconstructing performance-specific details such as sweating, wrinkles and blood flow. In this thesis we propose new, entirely passive techniques for advancing the state-of-the-art in 3D reconstruction of temporally deformable surfaces. We reconstruct high-resolution, temporally compatible geometry using multiple video cameras, without the need for either markers or structured light patterns. This thesis contains several contributions, both in computer graphics as well as computer vision. We start with new methods for multi-camera calibration and synchronization, which allow us to employ inexpensive consumer video cameras for reconstruction. We also present a novel technique for multi-view stereo reconstruction, capable of building high-resolution geometric meshes from a number of images. Finally, we combine these ideas and provide two inexpensive solutions for high-resolution 3D reconstruction of temporally deforming surfaces without the need for markers. The first is an application for capturing the shape and motion of garments, and the second is a new method for acquiring facial performances of actors. These new techniques have the potential for high impact in the film and video game industries.
Energy and U.S. Agriculture: Irrigation Pumping, 1974-80
Creators: name: Sloggett, Gordon
name: Sloggett, Gordon
Publisher: name: Unknown
Year: 1982
Subjects: subject: Crop Production/Industries
subject: Resource /Energy Economics and Policy
subject: Irrigation
subject: energy

description: Land irrigated with onfarm pumped water increased 7.5 million acres to 42 million acres from 1974 to 1980. Sharply higher energy prices pushed energy pumping costs from $570 million to $1.9 billion. Pump irrigators are applying energy-saving technologies such as low-pressure center pivots, which alone saved about $42 million in 1980. Favorable economic conditions could lead to 3 to 4 million additional pump-irrigated acres in the water-short Great Plains by the year 2020 and significant increases in the more humid Eastern United States.
Large 1-systems of Curves in Non-orientable Surfaces
Creators: name: Nicholls, Sarah Ruth
name: Scherich, Nancy
name: Shneidman, Julia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57m99

description: A longstanding avenue of research in orientable surface topology is to create and enumerate collections of curves in surfaces with certain intersection properties. We look for similar collections of curves in non-orientable surfaces. A surface is non-orientable if and only if it contains a Möbius band. We generalize a construction of Malestein-Rivin-Theran to non-orientable surfaces to exhibit a lower bound for the maximum number of curves that pairwise intersect 0 or 1 times in a generic non-orientable surface.
The $O(α_s^3 n_f T_F^2 C_{A,F})$} Contributions to the Gluonic Massive Operator Matrix Elements
Creators: name: Blümlein, Johannes
name: Hasselhuhn, Alexander
name: Klein, Sebastian
name: Schneider, Carsten
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The $O(α_s^3 n_f T_F^2 C_{A,F})$ terms to the massive gluonic operator matrix elements are calculated for general values of the Mellin variable $N$. These twist-2 matrix elements occur as transition functions in the variable flavor number scheme at NNLO. The calculation uses sum-representations in generalized hypergeometric series turning into harmonic sums. The analytic continuation to complex values of $N$ is provided.
description: 16 pages, 1 style file
Photoinduced Anomalous Supercurrent Hall Effect
Creators: name: Parafilo, A. V.
name: Kovalev, V. M.
name: Savenko, I. G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We predict a photoinduced Hall effect in an isotropic conventional two-dimensional superconductor with a built-in supercurrent exposed to a circularly-polarized light. This second-order with respect to the electromagnetic field amplitude effect occurs when the frequency of the field exceeds the double value of the superconducting gap. It reveals itself in the emergence of a Cooper-pair condensate flow in the direction transverse to the initial built-in supercurrent, which arises to compensate for the light-induced electric current of quasiparticles photoexcited across the gap. The initial supercurrent breaks both the time-reversal and inversion symmetries, while the presence of dilute disorder in the sample provides the breaking of the Galilean invariance. We develop a microscopic theory of the supercurrent Hall effect in the case of weak disorder and show, that the Hall supercurrent is directly proportional to the quasiparticle recombination time, which can acquire large values.
description: Manuscript: 5.5 pages
Milk Processor-Distributors' Sales, Costs, and Margins, 1980-81
Creators: name: Jones, W. Webster
name: Jones, W. Webster
Publisher: name: Unknown
Year: 1983
Subjects: subject: Agribusiness
subject: Production Economics
subject: Milk
subject: cream
subject: sales
subject: costs
subject: net margins
subject: gross margins
subject: processing
subject: procuring
subject: ice cream
subject: cottage cheese

description: Milk processor-distributors' 1981 pretax profits fell to 53 cents per hundredweight (cwt) of raw materials processed (RMP), 17 cents less than in 1980. Returns per cwt rose by $1.26, but costs rose by $1.43, 91 cents for raw materials and 52 cents for operating costs. Increases in total operating costs per cwt of RMP were largest for the smaller volume processors in 1981. For instance, costs for the five smallest processors jumped by 12.9 percent, but costs for the four largest rose 5.5 percent. Larger percentage increases in volume of RMP in 1981 for many of the larger plants apparently helped to increase productivity, thus holding down unit cost increases, especially for labor.
The role of cohomology in quantum computation with magic states
Creators: name: Raussendorf, Robert
name: Okay, Cihan
name: Zurel, Michael
name: Feldmann, Polina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A web of cohomological facts relates quantum error correction, measurement-based quantum computation, symmetry protected topological order and contextuality. Here we extend this web to quantum computation with magic states. In this computational scheme, the negativity of certain quasiprobability functions is an indicator for quantumness. However, when constructing quasiprobability functions to which this statement applies, a marked difference arises between the cases of even and odd local Hilbert space dimension. At a technical level, establishing negativity as an indicator of quantumness in quantum computation with magic states relies on two properties of the Wigner function: their covariance with respect to the Clifford group and positive representation of Pauli measurements. In odd dimension, Gross' Wigner function -- an adaptation of the original Wigner function to odd-finite-dimensional Hilbert spaces -- possesses these properties. In even dimension, Gross' Wigner function doesn't exist. Here we discuss the broader class of Wigner functions that, like Gross', are obtained from operator bases. We find that such Clifford-covariant Wigner functions do not exist in any even dimension, and furthermore, Pauli measurements cannot be positively represented by them in any even dimension whenever the number of qudits is n>=2. We establish that the obstructions to the existence of such Wigner functions are cohomological.
description: 35 pages
Water masers in the ALMA era: an excellent tool to study star formation at sub-arcsecond spatial scales
Creators: name: de Gregorio-Monsalvo, Itziar
name: Gil, Santiago
name: Santamaría-Miranda, Alejandro
name: Gómez, José Francisco
name: Pérez-Sánchez, Andrés Felipe
name: Plunkett, Adele
name: Artur de la Villarmois, Elizabeth
name: Guzmán, Viviana
name: Schreiber, Matthias R.
Publisher: name: Zenodo
Year: 2023

description: The water molecule is one of the most common compounds in the Universe and it exhibits several maser transitions at submillimeter wavelengths, which can be observed at ALMA. Previous studies have primarily focused on water masers at 22 GHz, which are excited in regions of high density and high temperature. These masers are typically very bright, spectrally narrow, and originate from very compact regions. Consequently, they have been invaluable for studying circumstellar structure and dynamics at sub-arcsecond spatial scales.
Different water maser transitions can be pumped over a range of astrophysical conditions. The submillimeter transitions at 321 GHz and 325 GHz, in particular, trace respectively warmer and lower density regions than the 22 GHz transition. They have been identified as tracers of mass-loss phenomena in a limited number of star-forming regions. Conversely, transitions such as the one at 183 GHz, which primarily undergo collisional pumping, can provide valuable insights on the physical conditions of the region where powerful molecular outflows interact with the material from the parental cloud.
Observations of different water maser lines need to be used to constrain the physical conditions in the masing region and they constitute excellent tools to study common phenomena associated with the star formation process at sub-arcsecond resolution, if observed with interferometers like ALMA.
In this poster we present the results of a survey searching for submillimeter water maser transitions at 321 and 325 GHz complemented with ALMA data at 183 GHz on a sample of young stellar objects spanning a wide range of masses, from high to low-mass.
Meat Distribution Patterns in Six Southern Metro Areas
Creators: name: Baker, Allen J.
name: Duewer, Lawrence A.
name: Baker, Allen J.
name: Duewer, Lawrence A.
Publisher: name: Unknown
Year: 1983
Subjects: subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Meat
subject: marketing
subject: distribution
subject: packers
subject: wholesalers
subject: retailers
subject: beef
subject: pork

description: Increases in meat marketing costs may have been reduced because there are fewer wholesalers in the marketing chain, according to this study of six southern metro areas. Meat wholesalers still dominate the U.S. market where major meat production and consumption areas are widely separated. But, these wholesalers face increasing competition from large chain groceries and restaurants buying meat from packers in the production centers. Wholesalers, to survive, sell in larger lots, accept smaller marketing margins, and service groceries and restaurants with specialty products. The growing trend toward away-from-home eating, much of it in fast food and chain restaurants, has eliminated some services of local wholesalers.
title: Essays in financial economics
Creators: name: Nicolai, Francesco
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2021

description: This dissertation consists of three chapters. In the first, I study the impact of institutional investors on asset prices, by focusing on Collateralized Loan Obligations (CLOs). I document that, in order to satisfy constraints based on the par value of their assets, CLOs become forced sellers of leveraged loans. Loans sold for non fundamental reasons trade at depressed prices for up to nine months after the shock. The effect cannot be explained by selection on ex-ante or ex-post loan characteristics. A large fraction of the dislocation in secondary markets is transmitted to the market of issuance: shocked companies due to refinance their loans substitute away from institutional tranches towards other types of securities. I show that the substitution is imperfect, causing an increase in the cost of borrowing for affected firms. In the second chapter, which is co-authored with Simona Risteska, we use data on mutual fund portfolio holdings to extract fund managers’ stock return expectations. We use panel regressions and economic theory to demonstrate that we are able to partial out the effect of time-varying stock and manager characteristics (e.g., risk-aversion) and show that subjective expected returns are significantly affected by personal experience. Managers are more strongly influenced by recent returns and those experienced at the early stages of their holding period. The third chapter, co-authored with Marco Pelosi and Simona Risteska, provides evidence of the disparity in the incidence of property taxes levied at different points in time. Housing demand is significantly less elastic with respect to taxes deferred to the future relative to taxes levied at the moment of the purchase. We attribute this difference to the lack of salience of future taxes at the moment of purchase. We provide directions on the optimal tax mix between salient and nonsalient taxes with the help of a model.
On the evolution of inhomogeneous perturbations in the $Λ$CDM model and $f(R)$ modified gravity theories
Creators: name: Schiavone, Tiziano
name: Montani, Giovanni
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We focus on weak inhomogeneous models of the Universe at low redshifts, described by the Lemaître-Tolman-Bondi (LTB) metric. The principal aim of this work is to compare the evolution of inhomogeneous perturbations in the $Λ$CDM cosmological model and $f(R)$ modified gravity theories, considering a flat Friedmann-Lemaître-Robertson-Walker (FLRW) metric for the background. More specifically, we adopt the equivalent scalar-tensor formalism in the Jordan frame, in which the extra degree of freedom of the $f(R)$ function is converted into a non-minimally coupled scalar field. We investigate the evolution of local inhomogeneities in time and space separately, following a linear perturbation approach. Then, we obtain spherically symmetric solutions in both cosmological models. Our results allow us to distinguish between the presence of a cosmological constant and modified gravity scenarios, since a peculiar Yukawa-like solution for radial perturbations occurs in the Jordan frame. Furthermore, the radial profile of perturbations does not depend on a particular choice of the $f(R)$ function, hence our results are valid for any $f(R)$ model.
description: 9 pages, 3 figures, Proceedings of the 16th Marcel Grossmann Meeting (5-10 July 2021). Talk presented in the parallel session "Dark Energy and the Accelerating Universe"
The unusual radio transient in M82: an SS 433 analogue?
Creators: name: Joseph, Tana
name: Maccarone, Thomas
name: Fender, Robert
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper we discuss the recently discovered radio transient in the nuclear region of M\,82. It has been suggested that this source is an X-ray binary, which, given the radio flux density, would require an X-ray luminosity, $L_{\rm X}\,\sim6\times10^{42}$\,erg\,s$^{-1}$ if it were a stellar mass black hole that followed established empirical relations for X-ray binaries. The source is not detected in the analysis of the X-ray archival data. Using a 99% confidence level upper limit we find that $L_{\rm X} \leq 1.8 \times 10^{37}$\,erg\,s$^{-1}$ and $1.5 \times 10^{37}$\,erg\,s$^{-1}$, using powerlaw and disk blackbody models respectively. The source is thus unlikely to be a traditional microquasar, but could be a system similar to SS\,433, a Galactic microquasar with a high ratio of radio to X-ray luminosity.
description: 5 pages, 3 figures
B2DROP for Providers
Creators: name: Apweiler, Sander
name: Winkens, Marvin
Publisher: name: Forschungzentrum Jülich
Year: 2023

description: Lecture at EUDAT Summer School 2023 (Kajaani, Finland), 27 Jun 2023 - 27 Jun 2023
description: Lecture about setting up a enterprise file sync & share (EFSS) service and connecting it with an authentication and authorization infrastructure (AAI).
Automated analysis of quantitative image data using isomorphic functional mixed models, with application to proteomics data
Creators: name: Morris, Jeffrey S.
name: Baladandayuthapani, Veerabhadran
name: Herrick, Richard C.
name: Sanna, Pietro
name: Gutstein, Howard
Publisher: name: arXiv
Year: 2011
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Image data are increasingly encountered and are of growing importance in many areas of science. Much of these data are quantitative image data, which are characterized by intensities that represent some measurement of interest in the scanned images. The data typically consist of multiple images on the same domain and the goal of the research is to combine the quantitative information across images to make inference about populations or interventions. In this paper we present a unified analysis framework for the analysis of quantitative image data using a Bayesian functional mixed model approach. This framework is flexible enough to handle complex, irregular images with many local features, and can model the simultaneous effects of multiple factors on the image intensities and account for the correlation between images induced by the design. We introduce a general isomorphic modeling approach to fitting the functional mixed model, of which the wavelet-based functional mixed model is one special case. With suitable modeling choices, this approach leads to efficient calculations and can result in flexible modeling and adaptive smoothing of the salient features in the data. The proposed method has the following advantages: it can be run automatically, it produces inferential plots indicating which regions of the image are associated with each factor, it simultaneously considers the practical and statistical significance of findings, and it controls the false discovery rate.
description: Published in at http://dx.doi.org/10.1214/10-AOAS407 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Drawing home - a phenomenological exploration of drawing in the domestic home.
Creators: name: Reid, Jane
Publisher: name: Loughborough University
Year: 2023
Subjects: classificationCode: 369999
subject: Other creative arts and writing not elsewhere classified

description: This research investigates the rooms and objects associated with a domestic home and considers in what way they might inform a fine art drawing practice. The research question, How can drawing inside the domestic home sustain a creative feminist drawing practice? emerges from drawing definitions which position drawing as a flexible and open-ended tool of discovery (De Zegher 1996) and a tool to uncover hidden, tacit knowledge (Petherbridge 2008, 2010).This practice-led research project recognises that a gender imbalance exists within the artworld (Gorrill 2021). The underrepresentation of women artists within the global art market (Morris 2022; Sieghart, 2022) can be attributed to the difficulties women artists face juggling duties of care, work and financial commitments. This thesis aims to demonstrate that rooms and associated contents within the home can sustain an art practice and therefore help to address this imbalance. The research has been carried out from the perspective of an artist who identifies with the complexities and frustrations associated with maintaining a professional art practice whilst balancing duties of care and associated responsibilities. A hybrid methodology using phenomenology, reflective theory and autoethnography has been developed to capture the lived experienced, whilst allowing a feminist lens to be adopted. By situating a drawing practice within the domestic home, the artist engages in a practical and reflective analysis of how specific rooms and spaces within the home can support and sustain a drawing practice. The research is informed by literature which positions drawing as a tool of feminist thinking (Pollock, 2021). Texts by Gaston Bachelard (1958) and Virginia Woolf (1929) guided the discovery of the creative potential of domestic spaces and contents which facilitated original insights into the uncovering of hidden knowledge. Findings identify that by situating a drawing practice within the home, drawing becomes an empowering tool to explore daily routines, repetitive chores, and domestic tasks. By looking anew at the rooms and objects within a domestic home, both the process of drawing and the drawing outcomes are rich in ethnographic detail, generative potential, whilst also making visible hidden tacit knowledge. My contribution to knowledge offers women artists an alternative method to sustain their art practice by positioning the domestic home as a valuable source of artistic creativity. By situating an art practice within the constraints of domestic life, women can continue to maintain an art practice and begin to address the underrepresentation of women within the art world.
Variational study of the flux tube recombination in the two quarks and two quarks system in Lattice QCD
Creators: name: Cardoso, M.
name: Cardoso, N.
name: Bicudo, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The color fields in a system composed by two static quarks and two static antiquarks are studied. In particular, we consider the four particles in the corners of a rectangle, and two possible alignment of the particles, one in which the quarks are at the same side of the rectangle, and the other where they are at opposite sides. We use a variational method, to probe not only the ground state but also the first excited state. This results permit us to observe and interpret the flux-tube recombination in the mesons to mesons and the tetraquark to mesons transitions, for both states. The results are compared with previous results for the static potential and the Casimir scaling predictions.
description: Submitted to Phys. Rev. D. 9 pages, 11 figures, 1 table
A Comparison of Tillage Systems: For Reducing Soil Erosion and Water Pollution
Creators: name: Christensen, Lee A
name: Norris, Patricia E.
name: Christensen, Lee A
name: Norris, Patricia E.
Publisher: name: Unknown
Year: 1983
Subjects: subject: Crop Production/Industries
subject: Productivity Analysis
subject: Resource /Energy Economics and Policy
subject: Conservation tillage
subject: minimum tillage
subject: no-till
subject: conventional tillage
subject: soil loss
subject: soil conservation
subject: erosion
subject: water conservation
subject: economics of conservation tillage

description: Cropland in minimum tillage rose from 15.8 percent of all cropland in 1973 to 29.1 percent in 1981. The share for no-till rose from 2.0 to 2.9 percent during the same period. These conservation tillage systems--minimum tillage and no-till--can also reduce soil loss up to 99 percent over conventional tillage. This report looks at trends in the use of various tillage systems and compares their economic impacts and effects on soil and water conservation, crop yields, and pesticide and energy use, using selected results from studies of tillage systems.
Data-Efficient Deep Reinforcement Learning for Attitude Control of Fixed-Wing UAVs: Field Experiments
Creators: name: Bøhn, Eivind
name: Coates, Erlend M.
name: Reinhardt, Dirk
name: Johansen, Tor Arne
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Attitude control of fixed-wing unmanned aerial vehicles (UAVs) is a difficult control problem in part due to uncertain nonlinear dynamics, actuator constraints, and coupled longitudinal and lateral motions. Current state-of-the-art autopilots are based on linear control and are thus limited in their effectiveness and performance. Deep reinforcement learning (DRL) is a machine learning method to automatically discover optimal control laws through interaction with the controlled system, which can handle complex nonlinear dynamics. We show in this paper that DRL can successfully learn to perform attitude control of a fixed-wing UAV operating directly on the original nonlinear dynamics, requiring as little as three minutes of flight data. We initially train our model in a simulation environment and then deploy the learned controller on the UAV in flight tests, demonstrating comparable performance to the state-of-the-art ArduPlane proportional-integral-derivative (PID) attitude controller with no further online learning required. Learning with significant actuation delay and diversified simulated dynamics were found to be crucial for successful transfer to control of the real UAV. In addition to a qualitative comparison with the ArduPlane autopilot, we present a quantitative assessment based on linear analysis to better understand the learning controller's behavior.
description: Published in IEEE Transactions on Neural Networks and Learning Systems - Special Issue: Reinforcement Learning Based Control: Data-Efficient and Resilient Methods
title: Sustainable Production of Aromatics by Catalytic Aldol Condensation of Biomass-Derived Ketones
Creators: name: Reif, Phillip
Publisher: name: UNSPECIFIED
Year: 2023

description: Achieving carbon neutrality and establishing a circular bioeconomy are major challenges of our time. Currently, polymers are predominantly derived from fossil resources. However, increasing demands for their sustainable production require the exploration of alternative pathways based on renewable biomass. For many monomers, aromatics are key precursors, but the large-scale production from biomass remains limited. Catalytic self-aldol condensation of biomass-derived alkyl methyl ketones over solid acid catalysts to aromatics is a promising, less explored pathway. The one-step reaction requires neither hydrogen nor precious metal catalysts. In this study, the aromatization of the model compound acetone was initially investigated under solvent-free batch and continuous flow conditions over commercially available catalysts. The goal was to identify acid catalysts with superior stability and activity and to elucidate structure-activity relationships. The most active catalyst under batch conditions proved to be unstable in the continuous flow reactor. Conversely, larger pore silica-alumina catalysts were observed to provide stable aromatization activity under flow conditions. Very high stability (> 50 h time-on-stream) combined with significant activity was found for the amorphous silica-alumina Siralox 30. The catalyst was also suitable for the aromatization of 2-butanone. Increased space-time-yield and energy-efficient product separation are feasible through solvent-free reaction conditions. Overcoming the challenges associated with catalyst deactivation represents a significant step toward the potential scale-up of the alkyl methyl ketone route and contributes to the transition to a fossil-free, renewable chemical industry.
Invariant generalized almost complex structures on real flag manifolds
Creators: name: Valencia, Fabricio
name: Varea, Carlos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53D18, 14M15

description: We characterize those real flag manifolds that can be endowed with invariant generalized almost complex structures. We show that no $GM_2$-maximal real flag manifolds admit integrable invariant generalized almost complex structures. We give a concrete description of the generalized complex geometry on the maximal real flags of type $B_2$, $G_2$, $A_3$, and $D_l$ with $l\geq 5$, where we prove that the space of invariant generalized almost complex structures under invariant $B$-transformations is homotopy equivalent to a torus and we classify all invariant generalized almost Hermitian structures on them.
description: 34 pages. Minor changes have been made. Final version to appear in The Journal of Geometric Analysis
Multiple Vortex Cores in 2D Electronic Systems with Proximity Induced Superconductivity
Creators: name: Kopnin, N. B.
name: Khaymovich, I. M.
name: Mel'nikov, A. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The structure of a proximity induced vortex core in a two-dimensional (2D) metallic layer covering a superconducting half-space is calculated. We predict formation of a multiple vortex core characterized by two-scale behavior of the local density of states (LDOS). For coherent tunnelling between the 2D layer and the bulk superconductor, the spectrum has two subgap branches while for incoherent tunnelling only one of them remains. The resulting splitting of the zero-bias anomaly and the multiple peak structure in the LDOS should be visible in the tunnelling spectroscopy experiments.
description: 13 pages, 4 figures
Remote pacemaker control of chimera states in multilayer networks of neurons
Creators: name: Ruzzene, Giulia
name: Omelchenko, Iryna
name: Sawicki, Jakub
name: Zakharova, Anna
name: Schöll, Eckehard
name: Andrzejak, Ralph G.
Publisher: name: Technische Universität Berlin
Year: 2020
Subjects: subject: 530 Physik
subject: chimera
subject: nonlinear dynamics
subject: neuronal dynamics
subject: FitzHugh-Nagumo neuron
subject: oscillator
subject: multilayer network
subject: chaos

description: Networks of coupled nonlinear oscillators allow for the formation of nontrivial partially synchronized spatiotemporal patterns, such as chimera states, in which there are coexisting coherent (synchronized) and incoherent (desynchronized) domains. These complementary domains form spontaneously, and it is impossible to predict where the synchronized group will be positioned within the network. Therefore, possible ways to control the spatial position of the coherent and incoherent groups forming the chimera states are of high current interest. In this work we investigate how to control chimera patterns in multiplex networks of FitzHugh-Nagumo neurons, and in particular we want to prove that it is possible to remotely control chimera states exploiting the multiplex structure. We introduce a pacemaker oscillator within the network: this is an oscillator that does not receive input from the rest of the network but is sending out information to its neighbors. The pacemakers can be positioned in one or both layers. Their presence breaks the spatial symmetry of the layer in which they are introduced and allows us to control the position of the incoherent domain. We demonstrate how the remote control is possible for both uni- and bidirectional coupling between the layers. Furthermore we show which are the limitations of our control mechanisms when it is generalized from single-layer to multilayer networks.
A Lévy input fluid queue with input and workload regulation
Creators: name: Palmowski, Zbigniew
name: Vlasiou, Maria
name: Zwart, Bert
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider a queuing model with the workload evolving between consecutive i.i.d.\ exponential timers $\{e_q^{(i)}\}_{i=1,2,...}$ according to a spectrally positive Lévy process $Y_i(t)$ that is reflected at zero, and where the environment $i$ equals 0 or 1. When the exponential clock $e_q^{(i)}$ ends, the workload, as well as the Lévy input process, are modified; this modification may depend on the current value of the workload, the maximum and the minimum workload observed during the previous cycle, and the environment $i$ of the Lévy input process itself during the previous cycle. We analyse the steady-state workload distribution for this model. The main theme of the analysis is the systematic application of non-trivial functionals, derived within the framework of fluctuation theory of Lévy processes, to workload and queuing models.
A high HDO/H2O ratio in the Class I protostar L1551 IRS5
Creators: name: Andreu, Audrey
name: Coutens, Audrey
name: Cruz-Sáenz de Miera, Fernando
name: Houry, Nicolas
name: Jørgensen, Jes K.
name: Kóspál, Ágnes
name: Harsono, Daniel
Publisher: name: Zenodo
Year: 2023
Subjects: astrochemistry
ISM: individual objects (L1551 IRS5)
stars: formation
stars: protostar
ISM: molecules

description: Water molecules play a key role in the interstellar medium as they cool down the warm regions and boost the gravitational collapse leading to star formation. They are also very abundant and fundamental to the emergence of life. Water molecules have been detected at different stages of the star formation process from cold prestellar cores to protoplanetary disks. The deuteration of water, through both the HDO/H2O and D2O/HDO ratios, is a chemical tool used to characterize the formation of water and its evolution from the early stages of the star formation process up to its delivery to planets. Since then, most of the studies focused on Class 0 sources. Studies on more evolved sources are scarce but are needed to reconstruct the chemical evolution of water. We will present here results regarding the water deuteration of L1551 IRS5, a Class I solar-type protostar and FUor-like object observed with the NOEMA interferometer. Thanks to these interferometric data, the water deuteration can be investigated in the innermost regions of the protostar at scales of about a few 100 au which is similar to the sizes of disks in which planets form. The results will be compared to previous studies on protostars and comets.
The shape distribution of superclusters in SDSS DR 12
Creators: name: Bag, Satadru
name: Liivamägi, Lauri Juhan
name: Einasto, Maret
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Galaxy superclusters, the largest galaxy structures in the cosmic web, are formed due to the gravitational collapse (although they are not usually gravitationally bound). Their geometrical properties can shed light on the structure formation process on cosmological scales, hence on the fundamental properties of gravity itself. In this work we study the distributions of the shape, topology and morphology of the superclusters extracted from SDSS DR 12 main galaxy sample and defined in two different ways - using fixed and adaptive density threshold in the luminosity-density field. To assess the geometry and topology of each individual supercluster, we employ Minkowski functionals and Shapefinders, precisely calculated by the shape diagnostic tool SURFGEN2. Both supercluster samples produce similar shape distributions. Not surprisingly, most superclusters are spherical in shape with trivial topology. However, large superclusters with volumes $V \gtrsim 10^{4}$ Mpc$^{3}$ are statistically found to be filamentary with non-zero genus values. The results, shape distributions and catalogues have been made publicly available.
description: 22 pages, 22 figures, accepted for publication in MNRAS
Efficient approximation of social relatedness over large social networks and application to query enabled recommender systems
Creators: name: Esfandiar, Pooya
Publisher: name: University of British Columbia
Year: 2010

description: Social relatedness measures such as the Katz score and the commute time between pairs of nodes have been subject of significant research effort motivated by social network problems including link prediction, anomalous link detection, and collaborative filtering. In this thesis, we are interested in computing: (1) the score for a given pair of nodes, and (2) the top-k nodes with the highest scores from a specific source node. Unlike most traditional approaches, ours scale to large networks with hundreds of thousands of nodes. We introduce an efficient iterative algorithm which calculates upper and lower bounds for the pairwise measures. For the top-k problem, we propose an algorithm that only has access to a small subset of nodes. Our approaches rely on techniques developed in numerical linear algebra and personalized PageRank computing. Using three real-world networks, we examine scalability and accuracy of our algorithms as in a short time as milliseconds to seconds. We also hypothesize that incorporating item based tags into a recommender system will improve its performance. We model such a system as a tri-partite graph of users, items and tags and use this graph to define a scoring function making use of graph-based proximity measures. Exactly calculating the item scores is computationally expensive, so we use the proposed top-k algorithm to calculate the scores. The usefulness and efficiency of the approaches are compared to a simple, non-graph based, approach. We evaluate these approaches on a combination of the Netflix ratings data and the IMDb tag data.
Simulation of Shock-Shock interaction in parsec-scale jets
Creators: name: Fromm, Christian M.
name: Perucho, Manel
name: Ros, Eduardo
name: Mimica, Petar
name: Savolainen, Tuomas
name: Lobanov, Andrei P.
name: Zensus, J. Anton
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The analysis of the radio light curves of the blazar CTA102 during its 2006 flare revealed a possible interaction between a standing shock wave and a traveling one. In order to better understand this highly non-linear process, we used a relativistic hydrodynamic code to simulate the high energy interaction and its related emission. The calculated synchrotron emission from these simulations showed an increase in turnover flux density, $S_{m}$, and turnover frequency, $ν_{m}$, during the interaction and decrease to its initial values after the passage of the traveling shock wave.
description: 4 pages, 1 figure, proceedings of the meeting "HEPRO III: High Energy Phenomena in Relativistic Outflows" (Barcelona, June 2011)