cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Robust statistical inference for longitudinal data with nonignorable dropouts
Creators: name: Shao, Yujing
name: Ma, Wei
name: Wang, Lei
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: In this paper, we propose robust statistical inference and variable selection method for generalized linear models that accommodate the outliers, nonignorable dropouts and within-subject correlations. The purpose of our study is threefold. First, we construct the robust and bias-corrected generalized estimating equations (GEEs) by combining the Mallows-type weights, Huber's score function and inverse probability weighting approaches to against the influence of outliers and account for nonignorable dropouts. Subsequently, the generalized method of moments is utilized to estimate the parameters in the nonignorable dropout propensity based on sufficient instrumental estimating equations. Second, in order to incorporate the within-subject correlations under an informative working correlation structure, we borrow the idea of quadratic inference function and hybrid-GEE to obtain the improved empirical likelihood procedures. The asymptotic properties of the proposed estimators and their confidence regions are derived. Third, the robust variable selection and algorithm are investigated. We evaluate the performance of proposed estimators through simulation and illustrate our method in an application to HIV-CD4 data.
A Description of Quasar Variability Measured Using Repeated SDSS and POSS Imaging
Creators: name: MacLeod, Chelsea L.
name: Ivezic, Zeljko
name: Sesar, Branimir
name: de Vries, Wim
name: Kochanek, Christopher S.
name: Kelly, Brandon C.
name: Becker, Andrew C.
name: Lupton, Robert H.
name: Hall, Patrick B.
name: Richards, Gordon T.
name: Anderson, Scott F.
name: Schneider, Donald P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We provide a quantitative description and statistical interpretation of the optical continuum variability of quasars. The Sloan Digital Sky Survey (SDSS) has obtained repeated imaging in five UV-to-IR photometric bands for 33,881 spectroscopically confirmed quasars. About 10,000 quasars have an average of 60 observations in each band obtained over a decade along Stripe 82 (S82), whereas the remaining ~25,000 have 2-3 observations due to scan overlaps. The observed time lags span the range from a day to almost 10 years, and constrain quasar variability at rest-frame time lags of up to 4 years, and at rest-frame wavelengths from 1000A to 6000A. We publicly release a user-friendly catalog of quasars from the SDSS Data Release 7 that have been observed at least twice in SDSS or once in both SDSS and the Palomar Observatory Sky Survey, and we use it to analyze the ensemble properties of quasar variability. Based on a damped random walk (DRW) model defined by a characteristic time scale and an asymptotic variability amplitude that scale with the luminosity, black hole mass, and rest wavelength for individual quasars calibrated in S82, we can fully explain the ensemble variability statistics of the non-S82 quasars such as the exponential distribution of large magnitude changes. All available data are consistent with the DRW model as a viable description of the optical continuum variability of quasars on time scales of ~5-2000 days in the rest frame. We use these models to predict the incidence of quasar contamination in transient surveys such as those from PTF and LSST.
description: 33 pages, 19 figures, replaced with accepted version. Catalog is available at http://www.astro.washington.edu/users/ivezic/macleod/qso_dr7/
On the numerical simulation of propagation of micro-level inherent uncertainty for chaotic dynamic systems
Creators: name: Liao, S. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: 37D45, 74H65

description: In this paper, an extremely accurate numerical algorithm, namely the "clean numerical simulation" (CNS), is proposed to accurately simulate the propagation of micro-level inherent physical uncertainty of chaotic dynamic systems. The chaotic Hamiltonian Hénon-Heiles system for motion of stars orbiting in a plane about the galactic center is used as an example to show its basic ideas and validity. Based on Taylor expansion at rather high-order and MP (multiple precision) data in very high accuracy, the CNS approach can provide reliable trajectories of the chaotic system in a finite interval $t\in[0,T_c]$, together with an explicit estimation of the critical time $T_c$. Besides, the residual and round-off errors are verified and estimated carefully by means of different time-step $Δt$, different precision of data, and different order $M$ of Taylor expansion. In this way, the numerical noises of the CNS can be reduced to a required level, i.e. the CNS is a rigorous algorithm. It is illustrated that, for the considered problem, the truncation and round-off errors of the CNS can be reduced even to the level of $10^{-1244}$ and $10^{-1000}$, respectively, so that the micro-level inherent physical uncertainty of the initial condition (in the level of $10^{-60}$) of the Hénon-Heiles system can be investigated accurately. It is found that, due to the sensitive dependence on initial condition (SDIC) of chaos, the micro-level inherent physical uncertainty of the position and velocity of a star transfers into the macroscopic randomness of motion. Thus, chaos might be a bridge from the micro-level inherent physical uncertainty to the macroscopic randomness in nature. This might provide us a new explanation to the SDIC of chaos from the physical viewpoint.
description: 24 pages, 5 Figures, 7 Tables
Isaías Lerner (Buenos Aires, 13 de marzo de 1932 – Nueva York, 8 de enero de 2013)
Creators: name: Grilli, Giuseppe
Publisher: name: Università degli  Studi di Milano
Year: 2013

description: Nadie puede afirmar que los ochenta años de Isaías Lerner hayan transcurrido sin pena
ni gloria. Ni – antes al contrario – que correspondieran únicamente a los de un ilustre
filólogo, y aún menos a los de un representante destacado de la profesión.
description: Altre Modernità, No 9 (2013): Apocalisse 2012
Momentum dependence in the dynamically assisted Sauter-Schwinger effect
Creators: name: Fey, Christian
name: Schützhold, Ralf
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently it has been found that the superposition of a strong and slow electric field with a weaker and faster pulse can significantly enhance the probability for non-perturbative electron-positron pair creation out of the vacuum -- the dynamically assisted Sauter-Schwinger effect. Via the WKB method, we estimate the momentum dependence of the pair creation probability and compare it to existing numerical results. Besides the theoretical interest, a better understanding of this pair creation mechanism should be helpful for the planned experiments aiming at its detection.
description: 4 pages RevTeX, 1 figure
Crossing Human Boundaries: Apocalypse and Posthumanism in Margaret Atwood’s Oryx and Crake and The Year of the Flood
Creators: name: Mosca, Valeria
Publisher: name: Università degli  Studi di Milano
Year: 2013
Subjects: Margaret Atwood; posthumanism; Jacques Derrida; dystopian fiction; animot.

description: Margaret Atwood’s Oryx and Crake (2003) and The Year of the Flood (2009) are the first and second novels in an as-yet-unfinished trilogy. The two works share a complex structure in which scenes from different moments in the future follow one another. A post-apocalyptic narrative line is intertwined with one that depicts events from a nearer future, all of them leading up to an environmental catastrophe of huge proportions. The nearest scenario is one of extreme genetic manipulation, in which the boundaries between species are blatantly crossed. Biopolitics strictly controls the environment and those who inhabit it; identities can be bought, and only some of them grant access to the Compounds – the only safe areas left after open spaces have become radioactive. In the meantime, all kinds of technological and genetic enhancements to human capabilities are being employed, some of them resulting in the creation of para-human populations. An environmental catastrophe follows, and both books feature last-man-on-earth narratives. Whether – or, more appropriately, how – the apocalyptic destruction is linked to an attempt to cross the boundary of the human is the issue this essay addresses. The first section deals with more classical interpretations of Atwood’s fiction as a cautionary tale about current environmental policies, whereas a new hypothesis is made in the second section, a post-humanist reading of Atwood's novels. Philosophical support will be provided by Jacques Derrida’s reflections on the fine line between animals and humans and Cary Wolfe’s theory of posthumanism.
description: Altre Modernità, No 9 (2013): Apocalisse 2012
Implicit Divided Differences, Little Schröder Numbers, and Catalan Numbers
Creators: name: Muntingh, Georg
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 05A15, 26A24

description: Under general conditions, the equation $g(x,y) = 0$ implicitly defines $y$ locally as a function of $x$. In this short note we study the combinatorial structure underlying a recently discovered formula for the divided differences of $y$ expressed in terms of bivariate divided differences of $g$, by analyzing the number of terms $a_n$ in this formula. The main result describes six equivalent characterizations of the sequence $\{a_n\}$.
description: 11 pages, 2 figures
Inheritance after Apocalypse: the Dystopian Environment
Creators: name: Blidariu, Serban Dan
Publisher: name: Università degli  Studi di Milano
Year: 2013
Subjects: apocalypse; dystopia; environment; nature; utopia

description: Utopias are perfect places but the term itself says that they are nowhere to be found, making them practically impossible. Dystopias, even if they are written as a warning of how things can get worse, seem much more probable. All utopian societies are systems of plenty where everyone has enough and no one lacks the basic necessities. Yet resources do not come out of nowhere. A political system may be needed in a utopia but it is not the sole condition. A barren environment would make perfection impossible. A devastated land, then, can lead to a dystopia. Our way of life is connected to the environment around us. A drastic change there would alter human behavior significantly. If utopia is the dream situation, the dystopia is obviously the nightmare. The late 20th century had a feeling of “the end”, a lot of finalities were imagined, including “the end of history”. However, once those notions were left behind, even dystopias started to imagine events happening in a post-apocalyptic situation. One such dystopia is The Road, a novel about the struggles of a father and a son trying to survive after an unnamed cataclysm. The father’s desire to take his child toward the sea, where he thinks it might be safe, also implies a journey through the devastated land. In their travel they will witness the devastation of nature and the changes that brings to human behavior, a change that was unwanted and, for the son, an inheritance the father was unwilling to pass on.
description: Altre Modernità, No 9 (2013): Apocalisse 2012
Soliton surfaces via zero-curvature representation of differential equations
Creators: name: Grundland, A. M.
name: Post, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: 35Q53, 35Q58, 52A05

description: The main aim of this paper is to introduce a new version of the Fokas-Gel'fand formula for immersion of soliton surfaces in Lie algebras. The paper contains a detailed exposition of the technique for obtaining exact forms of 2D-surfaces associated with any solution of a given nonlinear ordinary differential equation (ODE) which can be written in zero-curvature form. That is, for any generalized symmetry of the zero-curvature condition of the associated integrable model, it is possible to construct soliton surfaces whose Gauss-Mainardi-Codazzi equations are equivalent to infinitesimal deformations of the zero-curvature representation of the considered model. Conversely, it is shown (Proposition 1) that for a given immersion function of a 2D-soliton surface in a Lie algebra, it possible to derive the associated generalized vector field in evolutionary form which characterizes all symmetries of the zero-curvature condition. The theoretical considerations are illustrated via surfaces associated with the Painlevé equations P1, P2 and P3, including transcendental functions, the special cases of the rational and Airy solutions of P2 and the classical solutions of P3.
description: 28 pages, 2 figures
The Representational Impasse of Post-Apocalyptic Fiction: The Pesthouse by Jim Crace
Creators: name: De Cristofaro, Diletta
Publisher: name: Università degli  Studi di Milano
Year: 2013
Subjects: Jim Crace; The Pesthouse; post-apocalyptic fiction; contemporary British literature; temporal inversion; representational impasse.

description: Jim Crace’s The Pesthouse (2007) provides the ideal springboard for a discussion about the apocalypse and representation because the event remains unspecified, a gap in the story, suggesting the presence of epistemological limits.

The present article contends that this narrative choice depends on a representational impasse which makes the depiction of the apocalypse and its aftermath impossible and which post-apocalyptic fiction has to address, in order to grant its own existence. The apocalypse is to be considered the ultimate iconoclastic concept, utterly beyond our abilities as image-makers and story-tellers, because it has either to do with the notion of an absolute end or with that of the radical alterity of a new beginning.

A theoretical discussion of the impasse, divided, for the purposes of a more detailed analysis, into two dilemmas, is followed by an outline of how The Pesthouse engages with this unrepresentability. On the one hand, the British author deploys what might be defined as the logic of the absent referent, in order to allude to the unrepresentable apocalypse. This remains, in fact, inaccessible to language, and thus absent in the narrative, while several elements point to its absence. On the other hand, Crace uses a typical topos of post-apocalyptic fiction, temporal inversion, namely representing the future as a return to the past, to allude to the radical alterity of the aftermath.
description: Altre Modernità, No 9 (2013): Apocalisse 2012
Industrial bio-lubricants performance and characterization
Creators: name: Elemsimit, Abdulhamid A.
Publisher: name: University of British Columbia
Year: 2013

description: The general trend towards the use of high performance lubricants and environmentally friendly products supports the design of new industrial lubricants. Therefore, there are good practical reasons to extend the research related to lubrication. Bio-oils, as promising growing substitutes for mineral oils, need more research to deal with new and inherited problems. Meanwhile, there is no complete understanding of the lubrication phenomenon, nor a complete rheological characterization of oil lubricants. This research is an effort to study industrial bio-lubricants and to develop a more comprehensive approach, at the same time correlating their rheological and tribological behavior. Different commercial canola oil based lubricants were studied using different techniques. For validation and comparison, engine oil, silicone oil and mineral hydraulic oil were tested. Bio-lubricants exhibited constant viscosity at both moderate and high shear rates and shear thinning at low shear rates and temperatures below 30 degrees Celsius. Frequency sweep tests revealed a significant viscoelasticity of bio-lubricant which developed over time. Time dependence, structure recovery, gap size effect, surfactant behavior, and geometry’s material influence were all investigated. A high pressure cell and a polarized light microscope coupled with the rheometer were used to investigate the bio-lubricants. Thermal analysis was conducted using a differential scanning calorimeter. Several transition points were identified in the range of temperatures from -30 to 100 degrees Celsius, and the results have been connected to the viscoelastic behavior. Different tribological tests were used to investigate the lubricity of lubricants and bio-lubricants added by liquid crystals. The coefficient of friction, at tested temperatures, and the wear rate were observed over time. Adding two percent of ionic liquid crystals improved the wear resistance of the oil, but the bio-lubricant had the lowest coefficient of friction. This research could be considered as pioneer work. An attempt was made to achieve profound perspective matching between rheometry, tribology and thermal analysis. Some assumptions explaining the rheological and tribological behavior were hypothesized and associated with arguments and discussions. Based on, Imaginary scenario of bio-hydraulic oil behavior within a small gap was visualized.
Prognosis End-Time: Madness and Prophecy in Melancholia and Take Shelter
Creators: name: Doyle, Briohny
Publisher: name: Università degli  Studi di Milano
Year: 2013
Subjects: Madness, Foucault, Apocalypse, Film, von Trier, Jeff Nichols

description: This paper discusses two films released in 2011, Lars Von Trier's Melancholia and Jeff Nichols Take Shelter in the context of the history of dominant conceptions of madness as laid out in Foucault's History of Madness. I argue that these films allegorise protagonists' experiences of depression and schizophrenia in order to critique the present moment in North America as well as to restore a poetic link between madness, prophecy and apocalypse in the popular imagination.
description: Altre Modernità, No 9 (2013): Apocalisse 2012
Zur Einbringung und zum Tragverhalten von kombinierten Spundwänden von Ufereinfassungen
Creators: name: Beuße, Jannik
Publisher: name: Technische Universität Hamburg, Institut für Geotechnik und Baubetrieb
Year: 2023
Subjects: subject: Combined sheet pile wall
subject: Installation process
subject: Spatial bearing behavior
subject: Load distribution
subject: Waterfront structures
classificationCode: 620
subject: Engineering and Applied Operations
classificationCode: 690
subject: Building, Construction

description: Die vorliegende Arbeit untersucht mittels Modell- und Feldversuchen sowie numerischen Simulationen den Einbringvorgang von Trägern kombinierter Spundwände, die räumliche Lastverteilung sowie die Berücksichtigung des Bodens als Widerstand im Stabilitätsnachweis. Ein numerisches Ersatzmodell wird entwickelt, welches die Interaktion zwischen der Rammführung, dem Träger sowie dem Boden abbildet und so den gesamten Einbringvorgang simulieren kann. Das räumliche Tragverhalten wird mit einem Gewölbefaktor zwischen dem Träger und den Zwischenbohlen beschrieben. Für bindige Böden wird ein Ansatz der Drehfedersteifigkeit geliefert und die Berücksichtigung im Stabilitätsnachweis vorgestellt.
description: This work examines by means of Model and field tests as well as numerical simulations the installation process of king piles of combined sheet pile walls, the earth pressure distribution as well as the consideration of the soil as a resistance in the proof of stability. A numerical substitute model is developed, which takes the interaction between the ram guide, the king pile as well the ground into account and is able to simulate the entire installation process. The spatial load-bearing behavior is described with an Arch factor between the king piles and the intermediate piles. An estimate of the torsional spring stiffness is provided for cohesive soils and the consideration in the stability verification is presented.
title: MDCT findings in small bowel obstruction secondary to bezoar and differential diagnosis with "small-bowel faeces sign".
Creators: name: Aguilar Sánchez, Leonardo
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Emergency
subject: Abdomen
subject: Gastrointestinal tract
subject: CT
subject: Diagnostic procedure
subject: Education
subject: Obstruction / Occlusion

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Describe the CT findings in small bowel obstruction secondary to bezoar and establish keys for the differential diagnosis with other cases of small bowel obstruction where the "small-bowel faeces sign" can be...
Looking for a light Higgs boson in the overlooked channel
Creators: name: Gainer, James S.
name: Keung, Wai-Yee
name: Low, Ian
name: Schwaller, Pedro
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The final state obtained when a Higgs boson decays to a photon and a Z boson has been mostly overlooked in current searches for a light Higgs boson. However, when the Z boson decays leptonically, all final state particles in this channel can be measured, allowing for accurate reconstructions of the Higgs mass and angular correlations. We determine the sensitivity of the Large Hadron Collider (LHC) running at center of masses energies of 8 and 14 TeV to Standard Model (SM) Higgs bosons with masses in the 120 - 130 GeV range. For the 8 TeV LHC, sensitivity to several times the the SM cross section times branching ratio may be obtained with 20 inverse femtobarns of integrated luminosity, while for the 14 TeV LHC, the SM rate is probed with about 100 inverse femtobarns of integrated luminosity.
description: 4 pages, 4 figures. Improves on version 1 in that 8 and 14 TeV LHC running is considered, the case of a 125 GeV Higgs is treated specifically, and the effect of an additional jet in the final state has been taken into account in studying experimental sensitivity
Student perceptions of the Flipped Classroom
Creators: name: Johnson, Graham Brent
Publisher: name: University of British Columbia
Year: 2013

description: The Flipped Classroom is an instructional strategy that can provide educators with a way of minimizing the amount of direct-instruction in their teaching practice while maximizing one-to-one interaction. This strategy leverages technology providing additional supporting instructional material for students that can be accessed online. This frees up classroom time that had previously been used for lecturing. Students in three high school math classrooms where instruction was “flipped” were surveyed to examine their perceptions of the Flipped Classroom and to assess the role social media, educational technology, mastery learning, and self-pacing played in Flipped Classroom environments. The survey also addressed how the Flipped Classroom could support student learning and what could be done to improve Flipped Classroom implementations. The survey utilized both qualitative and quantitative research measures which provided a broader understanding of how students responded as a group and as individuals. The results revealed three major findings: students are doing less homework in a Flipped Classroom than in a traditional lecture-based classroom, students enjoyed learning in a Flipped Classroom environment, and students benefited from watching their lectures in condensed lesson videos. This research has implications for instructional delivery in 21st century classrooms. The findings of this study illustrate that technology can provide a self-paced instructional setting that can effectively support mastery learning for students. Additionally, educators who use the Flipped Classroom can add additional supporting elements like assessment for learning, problem-based inquiry, strategies for differentiation, and can create, overall, an environment for instruction that is more flexible than traditional classroom settings. Recommendations that emerged from the findings for improving Flipped Classroom implementation included: interactive instructional videos, increased in-class learning activities, and alterations to assessment.
Distortion, Messianism, and Apocalyptic Time in The Satanic Verses
Creators: name: Eisinger, Clara
Publisher: name: Università degli  Studi di Milano
Year: 2013
Subjects: Apocalypse; Modernism; Migrant; Post; Revelation

description: Salman Rushdie’s novel The Satanic Verses presents its readers with a striking perspective on apocalypse. Taking place in the context of a modernist, migrant worldview, this apocalypse works to unsettle its participating characters by teaching them how to create a world in which they might someday belong. Though often defined as destructive, the apocalypse as I define it involves a reaching for or gesture towards the impossible, which the Verses achieves through massive temporal distortion. Linear time finds itself subverted; characters’ narratives speed up or slow down, forcing them to question their various adventures in 1980s London. Rushdie’s protagonist Saladin Chamcha re-grasps and reinvents his world; his other protagonist, Gibreel Farishta, does not. For one man, apocalypse becomes a means of empowerment; for another, it develops into a black hole. Unlike real black holes, however, Rushdie’s apocalypse does not kill all who venture into it, but instead stretches its hardiest entrants both emotionally and intellectually before dropping them into a new universe. Apocalypse and the post-apocalyptic are not therefore to be feared but to be reached for: worthy achievements for those individuals who can survive the risk, the compression, and the disorientation to emerge in a ‘post’ that is not a wasteland but a realm of ceaseless energetic creation—a realm which allows migrants to construct for themselves better lives in the 21st century world.
description: Altre Modernità, No 9 (2013): Apocalisse 2012
title: Checkpoint inhibitor related adverse events: what the radiologist should be aware of
Creators: name: Vani, Vanina
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Oncology
subject: Abdomen
subject: Thorax
subject: CT
subject: MR
subject: PET-CT
subject: Complications
subject: Education
subject: Treatment effects
subject: Cancer
subject: Monoclonal antibodies
subject: Toxicity

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To highlight the most relevant immune-related adverse events (irAEs) for which imaging has an important role for identification and management. To describe the most important radiological signs of irAEs and related differential diagnoses. To provide...
title: Abdominal splenosis: a less-known tumor mimicker.
Creators: name: Porrello, Giorgia
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Trauma
subject: Tissue characterisation
subject: Imaging sequences
subject: Contrast agent-intravenous
subject: Nuclear medicine conventional
subject: MR
subject: CT
subject: Spleen
subject: Gastrointestinal tract
subject: Abdomen

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: To easily recognize splenosis and make a correct differential diagnosis with neoplastic...
Characterizing normal crossing hypersurfaces
Creators: name: Faber, Eleonore
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32S25, 32S10, 32A27, 14B04

description: The objective of this article is to give an effective algebraic characterization of normal crossing hypersurfaces in complex manifolds. It is shown that a hypersurface has normal crossings if and only if it is a free divisor, has a radical Jacobian ideal and a smooth normalization. Using K. Saito's theory of free divisors, also a characterization in terms of logarithmic differential forms and vector fields is found and and finally another one in terms of the logarithmic residue using recent results of M. Granger and M. Schulze.
description: v2: typos fixed, final version to appear in Math. Ann.; 24 pages, 2 figures
Parity violation of primordial magnetic fields in the CMB bispectrum
Creators: name: Shiraishi, Maresuke
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the parity violation in the cosmic microwave background (CMB) bispectrum induced by primordial magnetic fields (PMFs). Deriving a general formula for the CMB bispectrum generated from not only non-helical but also helical PMFs, we find that helical PMFs produce characteristic signals, which disappear in parity-conserving cases, such as the intensity-intensity-intensity bispectra arising from $\sum_{n=1}^3 \ell_n = {\rm odd}$. For fast numerical calculation of the CMB bispectrum, we reduce the one-loop formula to the tree-level one by using the so-called pole approximation. Then, we show that the magnetic anisotropic stress, which depends quadratically on non-helical and helical PMFs and acts as a source of the CMB fluctuation, produces the local-type non-Gaussianity. Comparing the CMB bispectra composed of the scalar and tensor modes with the noise spectra, we find that assuming the generation of the nearly scale-invariant non-helical and helical PMFs from the grand unification energy scale ($10^{14} {\rm GeV}$) to the electroweak one ($10^{3} {\rm GeV}$), the intensity-intensity-intensity bispectrum for $\sum_{n=1}^3 \ell_n = {\rm odd}$ can be observed by the WMAP experiment under the condition that $B_{1 \rm Mpc}^{2/3} {\cal B}_{1 \rm Mpc}^{1/3} > 2.7 - 4.5 {\rm nG}$ with $B_{1 \rm Mpc}$ and ${\cal B}_{1 \rm Mpc}$ being the non-helical and helical PMF strengths smoothed on 1 Mpc, respectively.
description: 18 pages, 2 figures. Accepted for publication in JCAP
Analyse und Optimierung von Suchvorgängen in der industriellen Produktion
Creators: name: Steenwerth, Philipp
Publisher: name: TUHH Universitätsbibliothek
Year: 2023
Subjects: subject: Suchen
subject: Suchaufwände
subject: Arbeitsproduktivität
subject: Analyse
subject: Verbesserung
classificationCode: 650
subject: Management, Public Relations

description: Im Bereich der industriellen Produktion sind Suchvorgänge allgegenwärtig und treten immer dann auf, wenn Material oder Informationen benötigt werden. Obwohl das Suchen eine fundamentale Aktivität innerhalb von Produktionsprozessen ist, sind bestehende Modelle und Methoden des Produktionsmanagements nicht für die Modellierung oder Analyse industrieller Suchvorgänge ausgelegt. Diese Arbeit stellt einen Ansatz zur Modellierung von industriellen Suchvorgängen vor und beschreibt ein Analysevorgehen zur Bewertung von Suchaufwänden in der Produktion. Außerdem wird ein Verbesserungsvorgehen zur systematischen Ableitung von Maßnahmen zur Reduzierung des Suchaufwands beschrieben. Die gesamte Methode wurde erfolgreich in einer variantenreichen Kleinserienfertigung angewandt und bewertet.
description: In industrial production, search processes appear whenever material or information is needed. Although searching is a fundamental activity within production processes, existing models within production management are not capable of analyzing search processes. This work presents an approach for modeling industrial search processes and describes an analysis procedure for evaluating search efforts in production. In addition, an improvement procedure for systematically deriving measures to reduce search efforts is described. The entire method was successfully applied and evaluated in a low-volume, high-variance production environment.
El apocalipsis doméstico: El fin del mundo según Jaume Balagueró
Creators: name: Expósito Barea, Milagros
name: Pérez-Gómez, Miguel
Publisher: name: Università degli  Studi di Milano
Year: 2013
Subjects: Balagueró, cine fantástico español, Nova Escola de Barcelona, cine apocalíptico

description: Jaume Balagueró's cinematography is directly connected with Adam Parfrey´s  concept of "Apocalypse Culture". It is a very personal vision of the end of the world in everyday life context. This author´s cinema does not show dystopian environments or collapsing societies or major natural disasters, on the contrary, the apocalypse born  indoors.

Balagueró builds his peculiar vision of the end of the world from his fondness for the dark and millenarian spirit. His works address from a gloomy and ugliness aesthetics more rooted in human society such as death, ancestral rites, as something immovable, the pursuit of primal evil as overcoming of conventional religions.

This paper aims to analyze the aesthetic, discursive and stylistic constacts that define the Jaume Balagueró´s cinema as apocalypse films, in which converge the classic and modern into what we call the Nova Escola de Barcelona.
description: Altre Modernità, No 9 (2013): Apocalisse 2012
Finitistic Extension Degree
Creators: name: Diveris, Kosmas
Publisher: name: arXiv
Year: 2011
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics

description: We introduce the finitistic extension degree of a ring and investigate rings for which it is finite. The Auslander-Reiten Conjecture is proved for rings of finite finitistic extension degree and these rings are also shown to have finite finitistic dimension. We apply these results to better understand a gen- eralized version of the Auslander-Reiten Condition for Gorenstein rings. We also record how the finitistic extension degree behaves with respect to many change of ring procedures that arise frequently in the commutative setting.
Spectre et géométrie conforme des variétés compactes à bord
Creators: name: Jammes, Pierre
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 35P15, 58J50

description: We prove that on any compact manifold $M^n$ with boundary, there exist a conformal class $C$ such that for any riemannian metric $g\in C$, $λ_1(M^n,g)Vol(M^n,g)^{2/n}< n.Vol(S^n,g_{\textrm{can}})^{2/n}$ and $σ_1(M,g,ρ)\mathcal M(\partial M)Vol(M)^{\frac{2-n}n}
description: 19 pages, in French, 5 figures
Discovery of bright z ~ 7 galaxies in the UltraVISTA survey
Creators: name: Bowler, R. A. A.
name: Dunlop, J. S.
name: McLure, R. J.
name: McCracken, H.
name: Milvang-Jensen, B.
name: Furusawa, H.
name: Fynbo, J. P. U.
name: Fevre, O. Le
name: Holt, J.
name: Ideue, Y.
name: Ihara, Y.
name: Rogers, A. B.
name: Taniguchi, Y.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We have exploited the new, deep, near-infrared UltraVISTA imaging of the COSMOS field, in tandem with deep optical and mid-infrared imaging, to conduct a new search for luminous galaxies at redshifts z ~ 7. The unique multi-wavelength dataset provided by VISTA, CFHT, Subaru, HST and Spitzer over a common area of 1 deg^2 has allowed us to select galaxy candidates at z > 6.5 by searching first for Y+J-detected (< 25 AB mag) objects which are undetected in the CFHT+HST optical data. This sample was then refined using a photometric redshift fitting code, enabling the rejection of lower-redshift galaxy contaminants and cool galactic M,L,T dwarf stars.The final result of this process is a small sample of (at most) ten credible galaxy candidates at z > 6.5 which we present in this paper. The first four of these appear to be robust galaxies at z > 6.5, and fitting to their stacked SED yields z = 6.98+-0.05 with a stellar mass M* = 5x10^9 Msun, and rest-frame UV spectral slope beta = -2.0+-0.2. The next three are also good candidates for z > 6.5 galaxies, but the possibility that they are low-redshift galaxies or dwarf stars cannot be excluded. Our final subset of three additional candidates is afflicted not only by potential dwarf-star contamination, but also contains objects likely to lie at redshifts just below z = 6.5. We show that the three even-brighter z > 7 galaxy candidates reported in the COSMOS field by Capak et al. (2011) in fact all lie at z ~ 1.5-3.5. Consequently the new z ~ 7 galaxies reported here are the first credible z ~ 7 Lyman-break galaxies discovered in the COSMOS field and, as the most UV-luminous discovered to date at these redshifts, are prime targets for deep follow-up spectroscopy. We explore their physical properties, and briefly consider the implications of their inferred number density for the form of the galaxy luminosity function at z = 7.
description: Updated to accepted version, MNRAS. 18 pages, 9 figures, 3 tables
Heights and totally real numbers
Creators: name: Pottmeyer, Lukas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37P30, 11G50 (Primary) 11R80 (Secondary)

description: 1973 Schinzel proved that the standard logarithmic height h on the maximal totally real field extension of the rationals is either zero or bounded from below by a positive constant. In this paper we study this property for canonical heights associated to rational functions and the corresponding dynamical system on the affine line. At the end, we will give a few remarks on the behavior of h on finite extensions of the maximal totally real field.
description: Major changes regarding the first version. E.g. the last chapter was canceled
On surgery curves for genus one slice knots
Creators: name: Gilmer, Patrick M.
name: Livingston, Charles
Publisher: name: arXiv
Year: 2011
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25

description: If a knot K bounds a genus one Seifert surface F in the 3-sphere and F contains an essential simple closed curve alpha that has induced framing 0 and is smoothly slice, then K is smoothly slice. Conjecturally, the converse holds. It is known that if K is slice, then there are strong constraints on the algebraic concordance class of such alpha, and it was thought that these constraints might imply that alpha is at least algebraically slice. We present a counterexample; in the process we answer negatively a question of Cooper and relate the result to a problem of Kauffman. Results of this paper depend on the interplay between the Casson-Gordon invariants of K and algebraic invariants of alpha.
description: 17 pages, 1 figure. Typographical corrections
New Plant Engineering Techniques, R&D Investment, and International Trade
Creators: name: Marette, Stéphan (Paris-Saclay)
name: Disdier, Anne-Célia  (PSE)
name: Bodnar, Anastasia  (USDA OCE)
name: Beghin, John C  (UNL)
name: Marette, Stéphan (Paris-Saclay)
name: Disdier, Anne-Célia  (PSE)
name: Bodnar, Anastasia  (USDA OCE)
name: Beghin, John C  (UNL)
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: Industrial Organization
subject: International Relations/Trade
subject: new plant engineering techniques (NPETs)
subject: genome editing (GenEd)
subject: trade
subject: willingness to pay (WTP)
subject: food innovation
subject: industrial organization
subject: apple
subject: nontariff measure (NTM)

description: New Plant Engineering Techniques (NPETs) may significantly improve both production and quality of foods. Consumers and regulators around the world might be reluctant to accept such products, which may cripple adoption and global market penetration of these products. We develop a parsimonious economic model for R&D investment in food innovations to identify conditions under which NPET technology emerges in a context of international trade. The framework integrates consumers’ willingness to pay (WTP) for the new food, the uncertainty of R&D processes, the associated regulatory cost of approval, and the competition between domestic and foreign products. With generic applicability, the model enables the quantitative analysis of new foods that could be introduced in markets and then traded across borders. We apply the framework to a hypothetical case of apples improved with NPETs. Simulation results suggest that import bans and high values of sunk costs can reduce R&D investment in NPETs to suboptimal levels.
title: Imaging pitfalls in paediatric patients: neuroblastoma or nephroblastoma?
Creators: name: Manea, Daniela
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Neoplasia
subject: Comparative studies
subject: CT
subject: Paediatric
subject: Oncology
subject: Abdomen

description: Learning objectives Background Findings and procedure details Conclusion Personal information References
description: Learning objectives: Due to the great clinical and social significance of neuroblastomas and nephroblastomas, this educational exibit aims to: review and illustrate the imaging characteristics of the most common retroperitoneal tumors in pediatric patients; to...
Representaciones de lo apocalíptico en cuatro escritores hispanoamericanos
Creators: name: Burgos, Fernando
Publisher: name: Università degli  Studi di Milano
Year: 2013
Subjects: heterogeneous visions of the apocalyptical, critical outlook of history, negativity of postmodernism, Spanish American short story, Lugones, Arlt, Iturra, Collyer

description: This essay examines the portrayal of Apocalypses as rendered in the short stories of two Argentinean and two Chilean writers, starting with the text “La lluvia de fuego” by Lugones published at the beginning of the twentieth century and ending with three short stories published by Collyer in the twenty-one century.  The depiction of the apocalyptical encompasses the aesthetical discourse of  modernity—represented by Leopoldo Lugones’ and Roberto Arlt’s fiction—and postmodernity, this last plane corresponding to Carlos Iturra’s and Jaime Collyer’s work.  The diversity in the rendering of the topic in question reaffirms the heterogeneous scrutiny and visions encountered in both the philosophical and the religious realms.  Lugones’ rendition will defy the biblical prohibition of looking at the destruction of Gomorra not only by providing a detailed account of the horror narrated by a disembodied entity and witness of the fiery rain of fire descended into the sinful town but also by openly assuming the principle of pleasure of the fallen city.  In Arlt’s interpretation the entire planet is annihilated by fire as a result of an untenable sense of superiority found in the crossing of the new urban settings and the undeterred anti-humanistic nature of capitalism.  Iturra’s short story brings a vision of a malevolent postmodernity by painting a metropolitan dystopian scenario where human dignity has completely vanished.   Finally, in Collyer’s short story production one can see a consistent preoccupation with the representation of Apocalypses dealing not so much with the end of history but rather with how in the name of history and especially of a blind and senseless reverence toward progress and postmodern indulgence, controlling societies are the real machinery of apocalypses and the cause of its continuous resurgence.
description: Altre Modernità, No 9 (2013): Apocalisse 2012
title: Symptom recall in screening programme as positive predictive value (PPV): an Italian single center experience
Creators: name: Leone, Federica
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Breast
subject: Oncology
subject: Management
subject: Mammography
subject: Ultrasound
subject: Staging
subject: Outcomes analysis
subject: Observer performance
subject: Cancer
subject: Outcomes
subject: Pathology

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: to compare the incidence of breast cancer between two group in the same population already checked by screening program: first group is madeof the symptom recalls and the second group is made of second level screening in order to evaluate the...
Patrimonio ebraico e identità: Alcune note di geografia culturale
Creators: name: Masotti, Lucia
Publisher: name: Università degli  Studi di Milano
Year: 2013

description: Jewish Heritage is currently the focus of many studies, adopting different perspectives and theoretical approaches. Its true nature needs to be investigated also through the conceptual framework of Cultural Geography, dealing with enlightened identity processes that give rise to the multiple meaning of “Jewish Cultural Heritage”.
 Indeed, open or closed settlements and their vestiges, cultural and intercultural regional networks, production and distribution of ancient manuscripts, circulation of people, goods and ideas are all manifestations of the same social processes through different territories and over time.
  Cultural Geography can offer an insight to more completely understand the relationships between material and immaterial, visible and invisible goods and values.

The material and cultural history of Jewish communities, which has been and continues to be a rewarding field of interdisciplinary studies, is a worthwhile subject from which observations of Cultural Geography has been carried out and is offered in this writing.
description: Altre Modernità, No 9 (2013): Apocalisse 2012
title: Ultrasound guided Fine Needle Aspiration Cytology of Gall bladder mass and mural thickening : Radio-pathological correlation
Creators: name: Choudhury, Binoy
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Cancer
subject: Biopsy
subject: Ultrasound
subject: Oncology
subject: Biliary Tract / Gallbladder

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: Carcinoma of the Gallbladder (GB) is the most common neoplasm of the biliary tract (1). Early symptoms of this disease are vague. Patient usually presents late when the disease is well established or reaches an inoperable state. So it is a highly...
Filosofia dello sport. Preparazione ad agire e vivere nel mondo
Creators: name: Bonori, Piercarlo
Publisher: name: Università degli Studi di Milano
Year: 2012

description: In questo articolo ci si interroga sul significato originario della pratica sportiva, si ipotizza che sport e arte si  possano considerare due differenti rami dell’estetica e, infine, si afferma che solo attraverso un’attività prettamente estetica, l’uomo può giungere a ripensare le condizioni del suo esistere e con ciò a riappropriarsi di un esistenza autentica. Muovendo da questo presupposto e attraverso differenti contributi in campo filosofico, antropologico e neuro-scientifico, si passa ad indagare il meccanismo  angoscia-trascendenza che si ipotizza reggere strutture sottostanti l’umano agire e con ciò a evidenziare, da un lato, il pericolo di perdersi all’interno di un’esistenza inautentica cui è esposto l’individuo, dall’altro, il ruolo che l’estetica e nella fattispecie lo sport giocano nel recupero di una dimensione di autenticità da parte dell’uomo. In conclusione, sulla scorta delle argomentazioni precedenti, emerge la necessità di un differente approccio alla fruizione estetica, sia essa di natura artistica, sia di natura sportiva, un approccio da parte dello spettatore che gli consenta di rivivere il senso originario del fare sport.
description: Itinera, No 3 (2012)