cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Confined magneto-optical waves in graphene
Creators: name: Ferreira, A.
name: Peres, N. M. R.
name: Neto, A. H. Castro
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The electromagnetic mode spectrum of single-layer graphene subjected to a quantizing magnetic field is computed taking into account intraband and interband contributions to the magneto-optical conductivity. We find that a sequence of weakly decaying quasi-transverse-electric modes, separated by magnetoplasmon polariton modes, emerge due to the quantizing magnetic field. The characteristics of these modes are tuneable, by changing the magnetic field or the Fermi energy.
description: 9 pages, 7 figures. published version: text and figures revised and updated + new references and one figure added
The Intermediate Scale MSSM, the Higgs Mass and F-theory Unification
Creators: name: Ibáñez, Luis E.
name: Marchesano, Fernando
name: Regalado, Diego
name: Valenzuela, Irene
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Even if SUSY is not present at the Electro-Weak scale, string theory suggests its presence at some scale M_{SS} below the string scale M_s to guarantee the absence of tachyons. We explore the possible value of M_{SS} consistent with gauge coupling unification and known sources of SUSY breaking in string theory. Within F-theory SU(5) unification these two requirements fix M_{SS} ~ 5 x 10^{10} GeV at an intermediate scale and a unification scale M_c ~ 3 x 10^{14} GeV. As a direct consequence one also predicts the vanishing of the quartic Higgs SM self-coupling at M_{SS} ~10^{11} GeV. This is tantalizingly consistent with recent LHC hints of a Higgs mass in the region 124-126 GeV. With such a low unification scale M_c ~ 3 x 10^{14} GeV one may worry about too fast proton decay via dimension 6 operators. However in the F-theory GUT context SU(5) is broken to the SM via hypercharge flux. We show that this hypercharge flux deforms the SM fermion wave functions leading to a suppression, avoiding in this way the strong experimental proton decay constraints. In these constructions there is generically an axion with a scale of size f_a ~ M_c/(4π)^2 ~ 10^{12} GeV which could solve the strong CP problem and provide for the observed dark matter. The prize to pay for these attractive features is to assume that the hierarchy problem is solved due to anthropic selection in a string landscape.
description: 48 pages, 8 figures. v3: further minor corrections
title: Thoracic Sarcoidosis: A pictorial review
Creators: name: Mira, Catarina
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Thorax
subject: Lung
subject: CT
subject: Conventional radiography
subject: Education
subject: Comparative studies
subject: Inflammation
subject: Pathology

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To briefly review the pathophysiology and clinical features ofsarcoidosis. To describetypical and atypicalhigh-resolution CTfindings. Tohighlight useful findings in differential diagnosis with other...
Selberg Integral and SU(N) AGT Conjecture
Creators: name: Zhang, Hong
name: Matsuo, Yutaka
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: An intriguing coincidence between the partition function of super Yang-Mills theory and correlation functions of 2d Toda system has been heavily studied recently. While the partition function of gauge theory was explored by Nekrasov, the correlation functions of Toda equation have not been completely understood. In this paper, we study the latter in the form of Dotsenko-Fateev integral and reduce it in the form of Selberg integral of several Jack polynomials. We conjecture a formula for such Selberg average which satisfies some consistency conditions and show that it reproduces the SU(N) version of AGT conjecture.
description: 35 pages, 5 figures; v2: minor modifications; v3: typos corrected, references added
title: Fibrocystic breast disease in MRI: when to suspect?
Creators: name: Bastreghi, Rafaela
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Pathology
subject: Cysts
subject: Image compression
subject: Education
subject: MR
subject: Breast

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: The fibrocystic breast disease may present as a non-mass enhancement (NME) in the magnetic resonance imaging (MRI), mimicking suspected malignancies enhancements. The NME are used to describe an area that is neither a mass or focus and is classified...
title: Haben wir eine „Greedflation“ und brauchen Preiskontrollen?: Kommentar
Creators: name: Bernhardt, Lea
name: Duso, Tomaso
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023

description: DIW Wochenbericht, 90 (2023), 26, S. 362
title: China vergibt vor allem Kredite an rohstoffreiche Länder, die wenig gegen Korruption unternehmen: Interview
Creators: name: Meister, Lorenz
name: Wittenberg, Erich
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023

description: DIW Wochenbericht, 90 (2023), 26, S. 361
The sensitivity of BAO Dark Energy Constraints to General Isocurvature Perturbations
Creators: name: Kasanda, S. Muya
name: Zunckel, C.
name: Moodley, K.
name: Bassett, B. A.
name: Okouma, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Baryon Acoustic Oscillation (BAO) surveys will be a leading method for addressing the dark energy challenge in the next decade. We explore in detail the effect of allowing for small amplitude admixtures of general isocurvature perturbations in addition to the dominant adiabatic mode. We find that non-adiabatic initial conditions leave the sound speed unchanged but instead excite different harmonics. These harmonics couple differently to Silk damping, altering the form and evolution of acoustic waves in the baryon-photon fluid prior to decoupling. This modifies not only the scale on which the sound waves imprint onto the baryon distribution, which is used as the standard ruler in BAO surveys, but also the shape, width and height of the BAO peak. We discuss these effects in detail and show how more general initial conditions impact our interpretation of cosmological data in dark energy studies. We find that the inclusion of these additional isocurvature modes leads to an increase in the Dark Energy Task Force Figure of merit by 140% and 60% for the BOSS and ADEPT experiments respectively when considered in conjunction with Planck data. We also show that the incorrect assumption of adiabaticity has the potential to bias our estimates of the dark energy parameters by $3σ$ ($1σ$) for a single correlated isocurvature mode, and up to $8σ$ ($3σ$) for three correlated isocurvature modes in the case of the BOSS (ADEPT) experiment. We find that the use of the large scale structure data in conjunction with CMB data improves our ability to measure the contributions of different modes to the initial conditions by as much as 100% for certain modes in the fully correlated case.
description: 20 pages, 17 figures
title: Patient perceptions of radiographer communication skills in general radiology
Creators: name: Lesyuk, Oksana
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Quality assurance
subject: Patterns of Care
subject: Outcomes
subject: Technical aspects
subject: Physiological studies
subject: Health policy and practice
subject: Digital radiography
subject: Conventional radiography
subject: Radiographers
subject: Professional issues

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: The improvement of results in healthcare through the transmission of information to the patient within a relation of empathy and trust is already a verified hypothesis. The purpose of this study was to explore of patient perceptions regarding the...
title: Chinesische Kredite nach Afrika unterscheiden sich von westlichen Entwicklungskrediten
Creators: name: Meister, Lorenz
name: Menkhoff, Lukas
name: Westen, Annika
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023
Subjects: subject: G15 International Financial Markets
subject: International lending
subject: conditionality
subject: China
subject: Africa

description: China hat in den letzten 20 Jahren auffällig viele Kredite an afrikanische Länder vergeben. Neue Kreditdaten zeigen, dass chinesische Kredite im Vergleich zu westlichen, multilateralen Krediten relativ teuer, nicht so langfristig, tendenziell stärker besichert und bezogen auf die Volumina im Zeitverlauf volatiler sind. Damit dürften westliche Kredite im Allgemeinen eher im volkswirtschaftlichen Interesse der Schuldner liegen. Ferner zielen chinesische Kredite auf rohstoffreiche Länder, die weniger gegen Korruption unternehmen, sodass es mehr Bereicherungsmöglichkeiten für lokale Entscheidungsträger*innen gibt. Schließlich punktet China, im Gegensatz zur westlichen Kreditvergabe, mit Krediten ohne wirtschaftspolitische Auflagen. Es scheint für westliche Geber überlegenswert, die Zahl und Eingriffsintensität von Kreditkonditionen zu reduzieren, um so der Souveränität anderer Länder Rechnung zu tragen.
description: DIW Wochenbericht, 90 (2023), 26, S. 353-360
Marketing Flowers: Credit and Financing Problems of Retail and Wholesale Florists in Four Iowa Cities
Creators: name: Powell, Jules V.
name: Edman, Victor G.
name: Powell, Jules V.
name: Edman, Victor G.
Publisher: name: Unknown
Year: 1965
Subjects: subject: Agricultural Finance
subject: Crop Production/Industries
subject: Financial Economics
subject: Marketing
subject: FOS: Economics and business

description: Excerpts from the report: The florist industry consists of many small businesses that, together, are big business. In 1959, more than 20,000 establishments produced flower crops. Their production was marketed through approximately 1,200 wholesale and 20,000 retail florists. Retail value of goods and services provided by these firms totaled nearly $1.2 billion, of which about $750 million came from sales of specialized retail florists and retail growers. Since most of the inventory of a florist shop is perishable or for specialized uses, florists have little collateral to offer in obtaining loans. If florists are unable to expand their businesses because of lack of funds, an analysis of their credit and financing problems and practices should indicate means by which their financial positions could be improved. This study was conducted to test the hypothesis that florists suffer from large bad-debt losses, and that this record hampers their ability to obtain operating capital from lending institutions.
title: Discovertebral lesions of the spine: infection or an imitation?
Creators: name: Alonso, Maitane
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Neuroradiology spine
subject: Anatomy
subject: Emergency
subject: MR
subject: Diagnostic procedure
subject: Infection
subject: Inflammation
subject: Neoplasia

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: The purpose of our educational exhibit is to: 1. evaluate the anatomical details and vascularization of discovertebral junction. 2. review pathophysiology of spinal infection and describe Magnetic Resonance Imaging (MRI) findings. 3. stablish a...
title: Protocolling of High Resoluton CT (HRCT) scans in a District General Hospital
Creators: name: Hamilton, Barbara
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Quality assurance
subject: Diagnostic procedure
subject: CT-High Resolution
subject: Thorax
subject: Respiratory system

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Multi-detector high resolution computed tomography (HRCT) of the thorax,obtained using a sharp reconstruction kernel, provides exquisite thin sectionimaging of the lung parenchyma. With advances in technology volumetric HRCT allows visualisation of...
Scattering phase shifts for two particles of different mass and non-zero total momentum in lattice QCD
Creators: name: Leskovec, Luka
name: Prelovsek, Sasa
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: We derive the relation between the scattering phase shift and the two-particle energy in the finite box, which is relevant for extracting the strong phase shifts in lattice QCD. We consider elastic scattering of two particles with different mass and with non-zero total momentum in the lattice frame. This is a generalization of the Luscher formula, which considers zero total momentum, and the generalization of Rummukainen-Gottlieb's formula, which considers degenerate particles with non-zero total momentum. We focus on the most relevant total momenta in practice, i.e. P=(2π/L) e_z and P=(2π/L) (e_x+e_y) including their multiples and permutations. We find that the P-wave phase shift can be reliably extracted from the two-particle energy if the phase shifts for l>=2 can be neglected, and we present the corresponding relations. The reliable extraction of S-wave phase shift is much more challenging since delta(l=0) is always accompanied by delta(l=1) in the phase shift relations, and we propose strategies for estimating delta(l=0). We also propose the quark-antiquark and meson-meson interpolators that transform according the considered irreducible representations.
description: 26 pages, 3 figures, version to appear in PRD; a list of meson-meson interpolators added; Figure 1 presenting an example of spectrum added
title: Dexmedetomidine for paediatric MRI sedation: a single centre change in service delivery
Creators: name: Simcock, Clare
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Paediatric
subject: Radiographers
subject: MR
subject: Diagnostic procedure
subject: Cost-effectiveness
subject: Safety
subject: Sedation

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: The use of general anaesthesia (GA) is a necessary, but expensive and time-consuming method for successful Magnetic Resonance Imaging (MRI) examinations in children. New sedative drugs such as dexmedetomidine are emerging as safe alternatives but...
On the Stability of Super-Earth Atmospheres
Creators: name: Heng, Kevin
name: Kopparla, Pushkar
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: We investigate the stability of super Earth atmospheres around M stars using a 7-parameter, analytical framework. We construct stability diagrams in the parameter space of exoplanetary radius versus semi-major axis and elucidate the regions in which the atmospheres are stable against the condensation of their major constituents, out of the gas phase, on their permanent nightside hemispheres. We find that super Earth atmospheres which are nitrogen-dominated ("Earth-like") occupy a smaller region of allowed parameter space, compared to hydrogen-dominated atmospheres, because of the dual effects of diminished advection and enhanced radiative cooling. Furthermore, some super Earths which reside within the habitable zones of M stars may not possess stable atmospheres, depending on the mean molecular weight and infrared photospheric pressure of their atmospheres. We apply our stability diagrams to GJ 436b and GJ 1214b, and demonstrate that atmospheric compositions with high mean molecular weights are disfavoured if these exoplanets possess solid surfaces and shallow atmospheres. Finally, we construct stability diagrams tailored to the Kepler dataset, for G and K stars, and predict that about half of the exoplanet candidates are expected to habour stable atmospheres if Earth-like conditions are assumed. We include 55 Cancri e and CoRoT-7b in our stability diagram for G stars.
description: Accepted by ApJ. 10 pages, 6 figures. No changes from previous version, except for added hypen in title
title: Schuldenstreit vorbei, aber: US-Wirtschaft fällt als weltweiter Konjunkturmotor vorerst aus: Kommentar
Creators: name: Baldi, Guido
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023

description: DIW Wochenbericht, 90 (2023), 25, S. 350
title: The Italian approach to philosophical practices: A socio-cultural perspective
Creators: name: Esposito, Silvia Maria
Publisher: name: University of Kent
Year: 2023

description: My thesis analyses how and why several different disciplines such as Philosophical Counselling, Philosophy for Children and for Community, Socratic Dialogue, Café Philo and Philosophy for Management, have spread in Italy in the 1990s, after being imported from the countries where they originated. These disciplines, which create a new controversial specialism, can be deployed in numerous and disparate fields, such as education, workplace, private life, and leisure. They are characterised by different methodological approaches and have multiple purposes which have been defined as educational, therapeutic, conciliatory, pragmatic, or simply critical. Despite their differences, they have been grouped in Italy under the general label of ‘pratiche filosofiche’ (philosophical practices). In my thesis, I consider philosophical practices as a socio-cultural phenomenon, and as a product of a specific environment. Focusing on Philosophical counselling and Philosophy for Children, I assess the extent to which the Italian cultural, political and institutional milieu has influenced the development of a specifically Italian take on philosophical practices compared to their initial tenets. My main argument is that the introduction of these practices in Italy has represented a partially unsuccessful response to the crisis of institutional philosophy and humanistic culture that is raging not only in Italy but also across the globe. I show that the Italian institutional and cultural context has favoured the emergence of these disciplines as a product to be marketed to an audience of aspiring practitioners and potential users, which jeopardizes their innovative drive. Lastly, I acknowledge the potential of philosophical practices in the country by articulating them to the currents of ‘Italian Theory’, thus highlighting the political value ofsome original applications of these disciplines in the Italian context.
title: Szenarien unterstützen Unternehmen selbst dann, wenn sich Gesetze ändern: Interview
Creators: name: Ballesteros, Fernanda
name: Wittenberg, Erich
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023

description: DIW Wochenbericht, 90 (2023), 25, S. 346
Summing Planar Diagrams by an Integrable Bootstrap II
Creators: name: Orland, Peter
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Lattice (hep-lat)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We continue our investigation of correlation functions of the large-N (planar) limit of the (1+1)-dimensional principal chiral sigma model, whose bare field U(x) lies in the fundamental matrix representation of SU(N). We find all the form factors of the renormalized field. An exact formula for Wightman and time-ordered correlation functions is found.
description: Further corrections of misprints. Version to appear in Phys. Rev. D. Still 8 pages, no figures
GdN Nanoisland-Based GaN Tunnel Junctions
Creators: name: Krishnamoorthy, Sriram
name: Kent, Thomas
name: Yang, Jing
name: Park, Pil Sung
name: Myers, Roberto
name: Rajan, Siddharth
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We show that GdN nanoislands can enhance inter-band tunneling in GaN PN junctions by several orders of magnitude, enabling low optical absorption low-resistance tunnel junctions (specific resistivity 1.3 X 10-3 Ω-cm2) for various optoelectronic applications. We exploit the ability to overgrow high quality GaN over GdN nanoislands to create new nanoscale heterostructure designs that are not feasible in planar epitaxy. GdN nanoisland assisted inter-band tunneling was found to enhance tunneling in both of the polar orientations of GaN. Tunnel injection of holes was confirmed by low temperature operation of GaN p-n junction with a tunneling contact layer, showing strong electroluminescence down to 20K. The availability of tunnel junctions with negligible absorption could not only improve the efficiency of existing optoelectronic devices significantly, but also enable new electronic and optical devices based on wide band gap materials.
Implementation of PhotoZ under Astro-WISE - A photometric redshift code for large datasets
Creators: name: Saglia, R. P.
name: Snigula, J.
name: Senger, R.
name: Bender, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We describe the implementation of the PhotoZ code in the framework of the Astro-WISE package and as part of the Photometric Classification Server of the PanSTARRS pipeline. Both systems allow the automatic measurement of photometric redshifts for the millions of objects being observed in the PanSTARRS project or expected to be observed by future surveys like KIDS, DES or EUCLID.
description: Accepted for publication in topical issue of Experimental Astronomy on Astro-WISE information system, references updated
title: A Qualitative Analysis of the Relationship Between Cyberthreats and Democratic Backsliding
Creators: name: Browning, Amy I.
Publisher: name: Old Dominion University Libraries
Year: 2023

description: Interstate conflict has developed beyond conventional tactics to include the cyber realm, making cybersecurity a key component of international relations and an integral part of state defense plans. Research in international security has included the analyses of the relative success or failures of particular cyberattacks. However, the instigators behind these attacks receive comparatively little attention, leaving a gap in knowledge for when, why, and where cyberthreats are likely to emerge. Recent analysis has found that democratic institutions are likely to hinder state-sponsored cyberattack initiation. A consideration that the latest wave of global democratic backsliding could be fueling cyberthreats must be made. I explore this linkage between democratic backsliding and cyberthreats using a qualitative, case study approach. By comparing changing political systems with frequency and severity of state-sponsored cyberattacks, I show how increased state cyberthreat usage often aids in eroding democratic institutions and values, and how the process of democratic backsliding itself paves the way for utilization of cyberthreats.
title: J. D. Bidenburg
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: J. D. Bidenburg as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
Kiloparsec-scale Spatial Offsets in Double-peaked Narrow-line Active Galactic Nuclei. I. Markers for Selection of Compelling Dual Active Galactic Nucleus Candidates
Creators: name: Comerford, Julia M.
name: Gerke, Brian F.
name: Stern, Daniel
name: Cooper, Michael C.
name: Weiner, Benjamin J.
name: Newman, Jeffrey A.
name: Madsen, Kristin
name: Barrows, R. Scott
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Merger-remnant galaxies with kpc-scale separation dual active galactic nuclei (AGNs) should be widespread as a consequence of galaxy mergers and triggered gas accretion onto supermassive black holes, yet very few dual AGNs have been observed. Galaxies with double-peaked narrow AGN emission lines in the Sloan Digital Sky Survey are plausible dual AGN candidates, but their double-peaked profiles could also be the result of gas kinematics or AGN-driven outflows and jets on small or large scales. To help distinguish between these scenarios, we have obtained spatial profiles of the AGN emission via follow-up long-slit spectroscopy of 81 double-peaked narrow-line AGNs in SDSS at 0.03 < z < 0.36 using Lick, Palomar, and MMT Observatories. We find that all 81 systems exhibit double AGN emission components with ~kpc projected spatial separations on the sky, which suggests that they are produced by kpc-scale dual AGNs or kpc-scale outflows, jets, or rotating gaseous disks. In addition, we find that the subsample (58%) of the objects with spatially compact emission components may be preferentially produced by dual AGNs, while the subsample (42%) with spatially extended emission components may be preferentially produced by AGN outflows. We also find that for 32% of the sample the two AGN emission components are preferentially aligned with the host galaxy major axis, as expected for dual AGNs orbiting in the host galaxy potential. Our results both narrow the list of possible physical mechanisms producing the double AGN components, and suggest several observational criteria for selecting the most promising dual AGN candidates from the full sample of double-peaked narrow-line AGNs. Using these criteria, we determine the 17 most compelling dual AGN candidates in our sample.
description: 12 pages, 8 figures, published in ApJ. Modified from original version to reflect referee's comments
Global hyperbolicity is stable in the interval topology
Creators: name: Navarro, J. J. Benavides
name: Minguzzi, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We prove that global hyperbolicity is stable in the interval topology on the spacetime metrics. We also prove that every globally hyperbolic spacetime admits a Cauchy hypersurface which remains Cauchy under small perturbations of the spacetime metric. Moreover, we prove that if the spacetime admits a complete timelike Killing field, then the light cones can be widened preserving both global hyperbolicity and the Killing property of the field.
description: 14 pages, 2 figures. v2: shortened introduction; v3: added a note and a reference
The p-rank stratification on the Siegel moduli space with Iwahori level structure
Creators: name: Hamacher, Paul
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Our concern in this paper is to describe the p-rank statification on the Siegel moduli space with Iwahori level structure over fields of positive characteristic. We calculate the dimension of the strata and describe the closure of a given stratum in terms of p-rank strata. We also examine the relationship between the p-rank stratification and the Kottwitz-Rapoport stratification.
description: 29 pages; v2: new result Theorem 0.2 (2c), revised section 3; v3: Added formula for number of top-dimensional KR strata v4: simplified formula and corrected mistakes of v3
title: Weg zur Klimaneutralität: Szenarien unterstützen Unternehmen und Finanzwirtschaft
Creators: name: Ballesteros, Fernanda
name: Hüttel, Alexandra
name: Neuhoff, Karsten
name: Marchewitz, Catherine
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023
Subjects: subject: E61 Policy Objectives; Policy Designs and Consistency; Policy Coordination
subject: E44 Financial Markets and the Macroeconomy
subject: Q54 Climate; Natural Disasters; Global Warming
subject: Q56 Environment and Development; Environment and Trade; Sustainability; Environmental Accounts and Accounting; Environmental Equity; Population Growth
subject: Q58 Environmental Economics: Government Policy
subject: Scenario analysis
subject: net zero
subject: transition plans
subject: forward-looking reporting
subject: transition risks

description: Im Klimaschutzgesetz hat sich Deutschland verpflichtet, schrittweise bis 2045 klimaneutral zu werden. Unternehmen aus Industrie und dem Dienstleistungssektor müssen daher ihre Produktion und Geschäftspraktiken umstellen, Finanzinstitutionen ihre Bewertungskriterien anpassen. Das bedarf in vielen Fällen einer neuen strategischen Ausrichtung und Investitionen in klimaneutrale Produkte, Geschäftsmodelle und Produktionstechniken. Dafür benötigen Unternehmen Kapital und die Unterstützung aus der Finanzwirtschaft, der daher eine zentrale Rolle bei der Erreichung von Klimazielen zukommt. Damit Investor*innen, Organisationen der Zivilgesellschaft und Behörden den Investitionsbedarf, Fortschritt und mögliche Risiken von Unternehmen auf dem Weg zur Klimaneutralität erfassen können, wird von Unternehmen eine vorausschauende Berichterstattung erwartet, die auf wissenschaftlichen Erkenntnissen und standardisierten Verfahren basiert. Die Wissenschaft arbeitet mit Szenarien, die auch Industrie- und Dienstleistungsunternehmen sowie Banken, Fonds und Versicherungen einheitliche und vergleichbare Informationen über den Übergang zu einem klimaneutralen Geschäftsmodell und daraus resultierende Risiken vermitteln. Mithilfe der Szenarien können Unternehmen die Transitionsrisiken und Chancen bei Entscheidungen über Investitionen und die strategische Ausrichtung berücksichtigen. Der Finanzwirtschaft ermöglichen die Szenarien das Investitionsportfolio schrittweise zu dekarbonisieren und unternehmensspezifische Transitionsrisiken und -chancen im Risikomanagement abzubilden.
description: DIW Wochenbericht, 90 (2023), 25, S. 337-345
CMB Lensing and Giant Rings
Creators: name: Rathaus, Ben
name: Itzhaki, Nissan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the CMB lensing signature of a pre-inationary particle (PIP), assuming it is responsible for the giant rings anomaly that was found recently in the WMAP data. Simulating Planck-like data we find that generically the CMB lensing signal to noise ratio associated with such a PIP is quite small and it would be difficult to cross correlate the temperature giant rings with the CMB lensing signal. However, if the pre-inationary particle is also responsible for the bulk flow measured from the local large scale structure, which happens to point roughly at the same direction as the giant rings, then the CMB lensing signal to noise ratio is fairly significant.
description: 5 pages, 4 figures, published in JCAP
Constructing Gravity Amplitudes from Real Soft and Collinear Factorisation
Creators: name: Dunbar, David C.
name: Ettle, James H.
name: Perkins, Warren B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Soft and collinear factorisations can be used to construct expressions for amplitudes in theories of gravity. We generalise the "half-soft" functions used previously to "soft-lifting" functions and use these to generate tree and one-loop amplitudes. In particular we construct expressions for MHV tree amplitudes and the rational terms in one-loop amplitudes in the specific context of N=4 supergravity. To completely determine the rational terms collinear factorisation must also be used. The rational terms for N=4 have a remarkable diagrammatic interpretation as arising from algebraic link diagrams.
description: 18 pages, axodraw, Proof of eq. 4.3 added
Packaging Bulk Cheese at the Store and the Central Warehouse
Creators: name: Flynn, Gordon
name: Flynn, Gordon
Publisher: name: Unknown
Year: 1965
Subjects: subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpt from the report: This study was made to evaluate different systems of packaging bulk cheese at the retail store and the central warehouse and to compare packaging costs at these locations. Improvements in methods, equipment, and layouts, which were developed in other studies, were incorporated in both retail store and warehouse operations.
Quantum nanophotonics using hyperbolic metamaterials
Creators: name: Cortes, C. L.
name: Newman, W.
name: Molesky, S.
name: Jacob, Z.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Engineering the optical properties using artificial nanostructured media known as metamaterials has led to breakthrough devices with capabilities from super-resolution imaging to invisibility. In this article, we review metamaterials for quantum nanophotonic applications, a recent development in the field. This seeks to address many challenges in the field of quantum optics using recent advances in nanophotonics and nanofabrication. We focus on the class of nanostructured media with hyperbolic dispersion that have emerged as one of the most promising metamaterials with a multitude of practical applications from subwavelength imaging, nanoscale waveguiding, biosensing to nonlinear switching. We present the various design and characterization principles of hyperbolic metamaterials and explain the most important property of such media: a broadband enhancement in the electromagnetic density of states. We review several recent experiments that have explored this phenomenon using spontaneous emission from dye molecules and quantum dots. We finally point to future applications of hyperbolic metamaterials of using the broadband enhancement in the spontaneous emission to construct single photon sources.
description: 25 pages, 12 figures, Review Article
title: Teodor von Lubienietzky
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Teodor von Lubienietzky as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
Third House, Montauk County Park: Historical and Architectural Data
Creators: name: Hefner, Robert
name: Hefner, Robert
Publisher: name: The Village of East Hampton
Year: 1999
Subjects: Architectural & site components
Architectural drawings
Structural drawings
Structures
Buildings
Montauk

description: This is a historic structure report of the Third House in Montauk County Park done by Robert Hefner for Suffolk County Department of Parks. This report was loaned to the Long Island Collection for Digitization purposes.
Synthesis of Spherical 4R Mechanism for Path Generation using Differential Evolution
Creators: name: Penunuri, F.
name: Peon-Escalante, R.
name: Villanueva, C.
name: Cruz-Villar, Carlos A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: The problem of path generation for the spherical 4R mechanism is solved using the Differential Evolution algorithm (DE). Formulas for the spherical geodesics are employed in order to obtain the parametric equation for the generated trajectory. Direct optimization of the objective function gives the solution to the path generation task without prescribed timing. Therefore, there is no need to separate this task into two stages to make the optimization. Moreover, the order defect problem can be solved without difficulty by means of manipulations of the individuals in the DE algorithm. Two examples of optimum synthesis showing the simplicity and effectiveness of this approach are included.
description: Submitted to Mechanism and Machine Theory
title: Neues DIW-Modell kann Einkommensverteilung am aktuellen Rand vorhersagen – Ungleichheit dürfte in diesem Jahr leicht zunehmen
Creators: name: Bönke, Timm
name: Dany-Knedlik, Geraldine
name: Pagenhardt, Laura
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023
Subjects: subject: E17 General Aggregative Models: Forecasting and Simulation: Models and Applications
subject: D31 Personal Income, Wealth, and Their Distributions
subject: E66 General Outlook and Conditions
subject: Nowcast
subject: income distribution
subject: inequality

description: Die ungleiche Verteilung der Arbeitseinkommen in Deutschland ist regelmäßig ein heiß diskutiertes Thema in Politik und Gesellschaft. Das Problem dabei: Relevante Daten für deren Berechnung liegen meist erst mit großer zeitlicher Verzögerung von teilweise mehr als zwei Jahren vor. Entsprechend in die Vergangenheit gerichtet sind bisherige Studien. Wie sich die Einkommensverteilung am aktuellen Rand entwickelt und derzeitige wirtschaftspolitische Maßnahmen wirken, bleibt in der Regel im Dunkeln. An dieser Stelle setzt das DIW Berlin nun an: Ein neues Prognosemodell erlaubt es, Aussagen über den derzeitigen Stand der Ungleichheit der monatlichen Bruttoarbeitseinkommen abhängig Beschäftigter zu treffen. Dazu wird eine Vielzahl gesamtwirtschaftlicher Arbeitsmarktvariablen, etwa der Anteil von Menschen in Kurzarbeit sowie Bruttolöhne und -gehälter in diversen Wirtschaftssektoren, mit Haushaltsbefragungen wie dem Sozio-oekonomischen Panel (SOEP) des DIW Berlin kombiniert. Die Berechnungen in diesem Wochenbericht zeigen, dass das Modell eine hohe Prognosegüte hat. Somit lassen sich auch erstmals Erkenntnisse zu einem längeren Zeitraum nach der Corona-Pandemie gewinnen: Nachdem die Einkommensungleichheit bis 2021, vor allem in den Jahren 2010 bis 2020, abgenommen hat, sagt das neue DIW-Modell für die Jahre 2022 und 2023 eine Unterbrechung dieses Trends voraus. Insgesamt dürfte die Ungleichheit der Arbeitseinkommen im Zuge der wirtschaftlichen Erholung nach der Pandemie sogar leicht zugenommen haben und auch in diesem Jahr noch etwas größer werden.
description: DIW Wochenbericht, 90 (2023), 24, S. 326-332
title: Die Inflation dürfte vor allem nächstes Jahr deutlich zurückgehen: Interview
Creators: name: Bönke, Timm
name: Dany-Knedlik, Geraldine
name: Wittenberg, Erich
Publisher: name: DIW - Deutsches Institut für Wirtschaftsforschung
Year: 2023

description: DIW Wochenbericht, 90 (2023), 24, S. 322
Bertoldo nostro contemporaneo. Riscritture teatrali del Novecento
Creators: name: Bonazzi, Nicola
Publisher: name: DNA – Di Nulla Academia
Year: 2023

description: Il personaggio di Bertoldo si è imposto immediatamente come una delle creazioni più potenti della nostra letteratura: egli è il villano astuto e saggio, in grado di affascinare la corte, che però allo stesso tempo diffida di lui. Nel Novecento Bertoldo torna come protagonista di una serie di opere teatrali, avendo esaurito forse la propria carica eversiva ma non quella comica, e insieme delineando con la sua figura rustica e la sua provenienza campagnola, un modo di vita più genuino e sano di quello ormai pienamente cittadino del secolo XX. Giovanni Cavicchioli, Massimo Dursi e Fulvio Tomizza sono i tre scrittori che nel secolo appena trascorso hanno dedicato altrettanti testi teatrali al personaggio inventato da Giulio Cesare Croce. Ad essi va aggiunto, già negli anni Duemila, Francesco Freyrie per una messinscena di Marco Baliani. Se si pensa che Bertoldo è anche il protagonista di tre film e che a lui è consacrato il titolo (e una rubrica) di uno dei maggiori settimanali umoristici del Novecento, si vedrà come la carica vitale del villano bolognese sia giunta (quasi) intatta alle soglie del nuovo millennio.
description: DNA – Di Nulla Academia, Vol. 4 No. 1 (2023): La Festa Di Nulla Academia
title: Urban Dietrich von Lüdecke
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Urban Dietrich von Lüdecke as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
The Chemical composition of the post-AGB F-supergiant CRL 2688
Creators: name: Ishigaki, Miho N.
name: Parthasarathy, Mudumba
name: Reddy, Bacham E.
name: García-Lario, Pedro
name: Takeda, Yoichi
name: Aoki, Wako
name: Garcia-Hernandez, D. A.
name: Manchado, Arturo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present an analysis of a high resolution (R~50,000) optical spectrum of the central region of the proto-planetary nebula CRL 2688. This object is thought to have recently moved off the AGB, and display abundance patterns of CNO and heavy elements that can provide us with important clues to understand the nucleosynthesis, dredge-up and mixing experienced by the envelope of the central star during its AGB stage of evolution. The analysis of the molecular features, presumably originated from the circumstellar matter provides further constraints on the chemistry and velocity of the expanding shell, expelled as a consequence of the strong mass loss experienced by the central star. We confirm that the central star shows a spectrum typical of an F-type supergiant with Teff=7250 K, log g=0.5 and [Fe/H]=-0.3 dex. We find that the abundance pattern of this object is characterized by enhancements of Carbon ([C/Fe]=0.6), Nitrogen ([N/Fe]=1.0) and Na ([Na/Fe]=0.7), similar to other previously known carbon-rich post-AGB stars. Yttrium is also enhanced while the [Ba/Y] ratio is very low (-1.0), indicating that only the light s-process elements are enhanced. The Zinc abundance is found to be normal, [Zn/Fe]=0.0, suggesting that there is no depletion of refractory elements. The Halpha, Na I and K I resonance lines show prominent emission components, whose helio-centric radial velocities are offsetted by -41 km/s relative to the photospheric metal-absorption lines. The molecular features of C_2 and CN also show emission components, whose velocities are consistent with the emission components of the Halpha, Na I, and K I lines. On the other hand, their absorption components are more highly blue shifted than the corresponding emission components, which suggests that the regions where the emission and absorption components arise are expanding at different velocities.
description: 10 pages, 7 figures, accepted for publication in MNRAS
Analogie e metafore nelle scienze «dure»
Creators: name: Albarello, Dario
Publisher: name: DNA – Di Nulla Academia
Year: 2023

description: Il testo è un invito ai linguisti ad occuparsi del linguaggio delle scienze «dure» e contribuire così alla chiarificazione dei suoi contenuti ed al suo uso corretto. Nel farlo ho cercato di sostenere che il linguaggio tecnico-scientifico è una parte del linguaggio naturale e come tale dovrebbe essere oggetto di studi da parte dei linguisti. Questa appartenenza si manifesta anche nell’uso che al suo interno si fa di strumenti quali la metafora e l’analogia per espandere il dominio della conoscenza, qui intesa come raccolta di osservazioni di fenomeni naturali e asserti sperimentalmente verificabili. Nella misura in cui vuole comunicare contenuti e guidare una praxis deve utilizzare gli strumenti della retorica fornendo argomentazioni plausibili a sostegno delle sue indicazioni riguardo a scelte ed azioni rivolte al futuro. Un uso inconsapevole di questi strumenti può produrre distorsioni che si riflettono sul cattivo uso della scienza e delle argomentazioni che traggono legittimità dalla sua autorevolezza.
description: DNA – Di Nulla Academia, Vol. 4 No. 1 (2023): La Festa Di Nulla Academia
title: J.C. (?) Lüde
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: J.C. (?) Lüde as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
title: Dorothea Elisabeth von Lüde (Lüden)
title: An entry in the LCA Online Dictionary of Leibniz’s Correspondents and Acquaintances
titleType: Subtitle
Creators: name: (:Tba)
Publisher: name: LCA Project
Year: 2018

description: Dorothea Elisabeth von Lüde (Lüden) as a personal relation of Leibniz’s: The resource presents biographical information on a correspondent of Leibniz's
On the galactic rotation curves problem within an axisymmetric approach
Creators: name: Alvarez, Cesar
name: Corradini, Olindo
name: Herrera-Aguilar, Alfredo
name: Nucamendi, Ulises
name: Santos, Eli
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In U. Nucamendi et al. Phys. Rev. D63 (2001) 125016 and K. Lake, Phys. Rev. Lett. 92 (2004) 051101 it has been shown that galactic potentials can be kinematically linked to the observed red/blue shifts of the corresponding galactic rotation curves under a minimal set of assumptions: the emitted photons come from stable timelike circular geodesic orbits of stars in a static spherically symmetric gravitational field, and propagate to us along null geodesics. It is remarkable that this relation can be established without appealing at all to a concrete theory of gravitational interaction. Here we generalize this kinematical spherically symmetric approach to the galactic rotation curves problem to the stationary axisymmetric realm since this is precisely the symmetry that spiral galaxies possess. Thus, by making use of the most general stationary axisymmetric metric, we also consider stable circular orbits of stars that emit signals which travel to a distant observer along null geodesics and express the galactic red/blue shifts in terms of three arbitrary metric functions, clarifying the contribution of the rotation as well as the dragging of the gravitational field. This stationary axisymmetric approach distinguishes between red and blue shifts emitted by circularly orbiting receding and approaching stars, respectively, even when they are considered with respect to the center of a spiral galaxy, indicating the need of precise measurements in order to confront predictions with observations. We also point out the difficulties one encounters in the attempt of determining the metric functions from observations and list some possible strategies to overcome them.
description: 7 pages in latex (MNRAS format), no figures, discussion and references added