cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An investigation of the Himawari-8 geostationary satellite as a dust monitoring platform for Australia
Creators: name: Holden, Alasdair James
Publisher: name: The Australian National University
Year: 2019

description: Examined with insitu ground data from the 12/2/19 from Dustwatch. It was found that the JMA adjusted EUMETSAT dust enhancement scheme works well and is able to clearly find raised dust at all times of the day and night. The algorithm adapted from this recipe however performed well during the day getting a probability of detection score as high as 0.75 but did not do so well at night producing a large false alarm ratio of 0.65. Regardless of the algorithm used the temporal resolution and spatial coverage of the Himawari-8 is very promising with the potential to revolutionise Australian dust literature and become the backbone of a country wide early warning and monitoring schemes.
Riconoscimento a EduInaf per il Premio “Basile”
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2023

Conferita al magazine di didattica e divulgazione dell’Istituto nazionale di astrofisica una segnalazione di merito per la formazione nella Pubblica amministrazione, nella sezione “Reti e sistemi formativi”. A ritirare oggi il premio a Roma, nell’Auditorium della Consob, è stata Livia Giacomini, direttrice di EduInaf
Lo strano caso dei pesi supermassimi
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2023

I primi risultati di Jwst hanno evidenziato la presenza di antiche galassie eccezionalmente massicce, la cui massa elevata ha generato una tensione nel modello attualmente più accreditato di formazione delle strutture. Se da una parte si è cercato di trovare una spiegazione plausibile per questo eccesso, un nuovo studio del Cosmic Dawn Center suggerisce che le masse potrebbero essere addirittura superiori
AXIOLOGICAL COORDINATES OF THE CREATIVE ECONOMY / АКСИОЛОГИЧЕСКИЕ КООРДИНАТЫ КРЕАТИВНОЙ ЭКОНОМИКИ
Creators: name: Simashenkov, Pavel
Publisher: name: Zenodo
Year: 2023
Subjects: creative economy
innovation
value based management
digitalization
utopianism
human resource management
education

description: The article critically covers the current issues of "value-driven management" and the creative economy. Analyzing the concept of a "fragile and incomprehensible" (BANI) world, the author conclude that the widely proclaimed era of the knowledge economy is nothing more than utopia. A value-based transformation is possible if it is approached in a comprehensive and systemic way, which requires large-scale transformations initiated and supported by the power structures. The author believe that the creative economy is more extensive than the traditional one, and its development potential is rather limited. The paradigm of "commercial creativity", in fact, is aimed at providing employment and meeting the needs of the population of the "golden billion" countries. 
Статья в критическом ключе освещает актуальные вопросы «ценностного менеджмента» и креативной экономики. Анализируя концепцию «хрупкого и непостижимого» (BANI) мира, автор приходит к выводу, что широко провозглашенная эра экономики знаний — не более чем утопия. Ценностная трансформация возможна, если подход к ней будет комплексным и системным, для чего требуются масштабные преобразования, инициируемые и поддерживаемые властными структурами. Креативная экономика, как полагает автор, в большей степени экстенсивна, чем традиционная, а потенциал ее развития весьма ограничен. Парадигма «коммерческого креатива», по сути, нацелена на  обеспечение занятости и удовлетворение потребностей населения стран «золотого миллиарда».
Attenti al Lupus 3
Creators: Valentina Guglielmo
Publisher: name: Media Inaf
Year: 2023

Grazie alla Dark Energy Camera e al grande campo di vista del telescopio Víctor M. Blanco a Cerro Tololo in Cile, è stata esplorata in dettaglio Lupus 3, una regione di formazione stellare nella quale emergono due giovani stelle blu. Al suo interno, nascoste da gas e polvere, molte altre giovani protostelle devono ancora accendersi. Si tratta di un ambiente perfetto per studiare il processo di formazione stellare
Scoperta la prima fascia di radiazione extrasolare
Creators: Giuseppe Fiasconaro
Publisher: name: Media Inaf
Year: 2023

Un team di astronomi guidati dall'Università della California a Santa Cruz ha osservato per la prima volta una cintura di radiazione al di fuori del Sistema solare. Si trova a circa 18 anni luce da noi, attorno alla nana bruna Lsr J1835+3259, ed è simile alle fasce di radiazione che cingono Giove
Hsp90 Inhibition Affects Cell Metabolism by Disrupting Mitochondrial Protein Insertion
Creators: name: Mycielska, Maria
name: Wachsmuth, Christian J.
name: Dettmer, Katja
name: Wagner, Christine
name: Oefner, Peter J.
name: Geissler, Edward K.
name: Lang, Sven A.
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: Cancer; Glycolysis; Mitochondrial activity; Tom40
subject: 610 Medizin

description: Hsp90 is a molecular chaperone interacting with hundreds client proteins. Little is known, however, about Hsp90 influence on cancer cell metabolism. Here we show that the inhibition of Hsp90 affects indirectly glycolysis by disrupting mitochondrial insertion of the elements of Translocase of the Outer Membrane (TOM) complex in tumor cells. Improper insertion of Tom40 decreases the abundance of many mitochondrial proteins resulting in reduced mitochondrial activity. This is accompanied by increased production and release of lactate and serine. These results indicate an increased rate of glycolysis with serine synthesis compensating for the loss of energy and mitochondrially derived metabolites, potentially enhancing the metastatic potential of surviving cells. Our results provide novel insights into the effects of Hsp90 inhibition on cancer cell metabolism.
Assetati di scienza, torna Pint of Science!
Creators: Chiara Badia
Publisher: name: Media Inaf
Year: 2023

Tra scienza e boccali di birra, l’evento di divulgazione scientifica più grande al mondo è giunto all'ottava edizione. Dal 22 al 24 maggio i pub di 26 paesi – fra i quali l’Italia, con ben 23 città in lista – ospiteranno Pint of Science “spillando” tantissimi appuntamenti per gli appassionati di astronomia, e non solo, e numerosi incontri con ricercatori e ricercatrici dell’Inaf
A new generation of simultaneous fits to LHC data using deep learning
Creators: name: Iranipour, S
name: Ubiali, M
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: hep-ph

description: We present a new methodology that is able to yield a simultaneous determination of the Parton Distribution Functions (PDFs) of the proton alongside any set of parameters that determine the theory predictions; whether within the Standard Model (SM) or beyond it. The SIMUnet methodology is based on an extension of the NNPDF4.0 neural network architecture, which allows the addition of an extra layer to simultaneously determine PDFs alongside an arbitrary number of such parameters. We illustrate its capabilities by simultaneously fitting PDFs with a subset of Wilson coefficients within the Standard Model Effective Field Theory framework and show how the methodology extends naturally to larger subsets of Wilson coefficients and to other SM precision parameters, such as the strong coupling constant or the heavy quark masses.
description: STFC (ST/T000694/1) Royal Society (DH15008) Horizon 2020 (950246)
The nature and the making of a frontrunner city and its role in sustainability transition: The case of Kitakyushu
Creators: name: Irvine, Sigourney
Publisher: name: The Australian National University
Year: 2015

description: With an increasingly urban global population, cities have an important role to play in global environmental sustainability. Uncertainty surrounds both the problems and solutions in developing sustainable urban pathways, and experimentation with sustainable practices on a local scale is required to address this. The aim of this thesis is to contribute to understandings of the processes by which cities may become more sustainable. To do so, this thesis examines the Japanese city of Kitakyushu as a case study of a frontrunner—a city engaged in ongoing sustainability experimentation. It investigates which elements trigger, enable, hinder and support ongoing sustainability experimentation in cities, and whether frontrunner cities enable sustainability transitions elsewhere. To understand the making of a frontrunner city and its wider role in sustainability transition, Japanese government officials, citizens, researchers, NPOs and business leaders were interviewed, as well as stakeholders from two cities in developing Asia—Surabaya and Haiphong—with which Kitakyushu is linked. Systems analysis was used to identify the process of sustainability transition and the diffusion of knowledge and technology. This research found that both environmental and economic triggers provided windows of opportunity for actors to promote visions of change. This led to ongoing experimentation enabled by co-evolutionary processes. The success of Kitakyushu’s approach to urban revitalisation and sustainability, supported by linkages with business and national government, means that it is able to play a role in generating a wider range of environmental solutions for new local contexts through city-to-city collaboration. These findings show how an enabling environment for experimentation is developed and how promotion of sustainability transition in other cities can lead to positive benefits for both sides. This can lay the groundwork for more sustainable pathways important for a rapidly developing and urbanising Asia.
A generalized residual technique for analyzing complex movement models using earth mover's distance
Creators: name: Potts, Jonathan R.
name: Auger-Méthé, Marie
name: Mokross, Karl
name: Lewis, Mark A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: 1. Complex systems of moving and interacting objects are ubiquitous in the natural and social sciences. Predicting their behavior often requires models that mimic these systems with sufficient accuracy, while accounting for their inherent stochasticity. Though tools exist to determine which of a set of candidate models is best relative to the others, there is currently no generic goodness-of-fit framework for testing how close the best model is to the real complex stochastic system. 2. We propose such a framework, using a novel application of the Earth mover's distance, also known as the Wasserstein metric. It is applicable to any stochastic process where the probability of the model's state at time $t$ is a function of the state at previous times. It generalizes the concept of a residual, often used to analyze 1D summary statistics, to situations where the complexity of the underlying model's probability distribution makes standard residual analysis too imprecise for practical use. 3. We give a scheme for testing the hypothesis that a model is an accurate description of a data set. We demonstrate the tractability and usefulness of our approach by application to animal movement models in complex, heterogeneous environments. We detail methods for visualizing results and extracting a variety of information on a given model's quality, such as whether there is any inherent bias in the model, or in which situations it is most accurate. We demonstrate our techniques by application to data on multi-species flocks of insectivore birds in the Amazon rainforest. 4. This work provides a usable toolkit to assess the quality of generic movement models of complex systems, in an absolute rather than a relative sense.
Medicina celebra i primi 40 anni della parabola
Creators: Daria Guidetti
Publisher: name: Media Inaf
Year: 2023

Da lunedì 22 a venerdì 26 maggio si terrà all’Area della ricerca di Bologna il convegno internazionale “Bologna Vlbi: Life begins at 40!”. L’occasione è un compleanno importante: a spegnere le 40 candeline è la parabola da 32 metri della Stazione radioastronomica Inaf a Medicina, che sarà intitolata alla memoria del professor Gavril Grueff, scomparso lo scorso 7 luglio 2022
Formalizing Geometric Algebra in Lean
Creators: name: Wieser, Eric
name: Song, U
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Article
T.C. ICCA 12, Hefei, August 3-7, 2020
Geometric Algebra
Clifford Algebra
Universal property
Lean
mathlib
Primary 15A66
Secondary 68V20

description: Funder: Cambridge Commonwealth, European and International Trust; doi: http://dx.doi.org/10.13039/501100003343
description: This paper explores formalizing Geometric (or Clifford) algebras into the Lean 3 theorem prover, building upon the substantial body of work that is the Lean mathematics library, mathlib. As we use Lean source code to demonstrate many of our ideas, we include a brief introduction to the Lean language targeted at a reader with no prior experience with Lean or theorem provers in general. We formalize the multivectors as the quotient of the tensor algebra by a suitable relation, which provides the ring structure automatically, then go on to establish the universal property of the Clifford algebra. We show that this is quite different to the approach taken by existing formalizations of Geometric algebra in other theorem provers; most notably, our approach does not require a choice of basis. We go on to show how operations and structure such as involutions, versors, and the $\mathbb{Z}_2$-grading can be defined using the universal property alone, and how to recover an induction principle from the universal property suitable for proving statements about these definitions. We outline the steps needed to formalize the wedge product and $\mathbb{N}$-grading, and some of the gaps in mathlib that currently make this challenging.
Pain modulation by intranasal oxytocin and emotional picture viewing — a randomized double-blind fMRI study
Creators: name: Zunhammer, Matthias
name: Geis, Sandra
name: Busch, Volker
name: Eichhammer, Peter
name: Greenlee, Mark W.
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: CLINICAL-TRIALS; HUMAN BRAIN; RESPONSES; VALENCE; HUMANS; ATTENTION; STIMULI; RECOMMENDATIONS; POTENTIALS; PERCEPTION;
subject: 150 Psychologie

description: The hormone oxytocin has been hypothesized to influence the emotional dimension of pain. This randomized, placebo-controlled, double-blind, crossover study explored whether intranasal oxytocin and emotional context can affect heat pain perception in 30 healthy male volunteers. After receiving 36 IU oxytocin or placebo, participants underwent functional Magnetic Resonance Imaging (fMRI) during which noxious and non-noxious thermode heat stimuli were applied. Simultaneously, scenes from the International Affective Pictures System (IAPS) with positive, neutral, and negative emotional valence were shown. Heat intensity and unpleasantness ratings were obtained. The activity of whole-brain correlates of heat processing was quantified via multi-voxel pattern analysis. We observed no appreciable main effects of oxytocin on ratings or neural pain correlates. Effects of emotional picture valence on ratings were smaller than reported in previous studies. Nevertheless, oxytocin was found to significantly enhance the influence of picture valence on unpleasantness ratings at noxious heat levels. No corresponding changes in whole-brain correlates of heat intensity processing were found. Our study provides evidence that intranasal oxytocin increases the effects of emotional context on the subjective unpleasantness of experimental heat pain. Future studies are needed to determine whether this effect can be utilized in clinical settings.
Wino Dark Matter and Future dSph Observations
Creators: name: Bhattacherjee, Biplob
name: Ibe, Masahiro
name: Ichikawa, Koji
name: Matsumoto, Shigeki
name: Nishiyama, Kohei
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We discuss the indirect detection of the wino dark matter utilizing gamma-ray observations of dwarf spheroidal galaxies (dSphs). After carefully reviewing current limits with particular attention to astrophysical uncertainties, we show prospects of the wino mass limit in future gamma-ray observation by the Fermi-LAT and the GAMMA-400 telescopes. We find that the improvement of the so-called $J$-factor of both the classical and the ultra-faint dSphs will play a crucial role to cover whole mass range of the wino dark matter. For example, with $δ(\log_{10}J) = 0.1$ for both the classical and the ultra-faint dSphs, whole wino dark matter mass range can be covered by 15 years and 10 years data at the Fermi-LAT and GAMMA-400 telescopes, respectively.
description: 32 pages, 13 figures
Jwst, selezionati i programmi per il secondo ciclo
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2023

Sono quasi 250 le proposte selezionate per il Jwst Cycle 2, preparate da oltre duemila ricercatrici e ricercatori provenienti da 41 paesi. Venti delle proposte selezionate sono guidate da italiani, la maggior parte dei quali all’estero. Media Inaf ha raggiunto i quattro responsabili scientifici sul territorio nazionale –  Eleonora Troja, Federico Lelli, Marco Castellano e Iván López – per raccontarvi i loro programmi
Smart cities, a guiding vision for sustainable urban development? A case study examining the role of expectations and visions in Songdo City
Creators: name: Kim, Sowon
Publisher: name: The Australian National University
Year: 2017

description: It is expected that by 2050, 2.5 billion more people will be living in urban areas. Without proper planning, this will have significant impacts for sustainability. Countries all over the world are planning and creating large-scale top-down cities in order to address the growing global population and to gain the benefits associated with urbanisation. One of the recent trends in this area is the development of smart cities. The articulation of expectations and visions have in the past been identified as an important process in the adoption and acceptance of sustainability experiments. The present study aims to contribute a deeper understanding of the role that the articulation of expectations and visions have in large-scale sustainability experiments. It does this by exploring a case study of Songdo City, a city widely recognised as one of the first smart cities in the world. From its inception, Songdo was strongly articulated to be a major international business hub, later adding sustainability to its expectations and visions. The extent to which these expectations and visions were diffused into reality was examined from the perspectives of residents of the city. In order to explore these processes, individuals involved in the articulation and implementation of Songdo’s expectations and visions, as well as residents currently living in Songdo were interviewed. Residents also completed a survey to support the interview data. The data were analysed in accordance with the expectations and visions literature. This research made three key findings: (1) the articulation of expectations and visions is a critical process to gain support from residents and for drawing in new residents; (2) the stronger and more tangible the articulation of the expectations and visions are, the greater the backlash that results from the divergence of reality from the expectations and visions; and, (3) an overemphasis of the importance of the expectations and visions leads to a neglect of both alternative pathways to success and critical evaluations of the articulated expectations and visions. This research shows that there is a need for city planners to balance the articulation of expectations and visions with the need for future flexibility within the system. It further adds that residents are critical actors within the sustainability experimentation literature, who provide important insights into the acceptance of expectations and visions.
Supernova un po’ così: s’è sentita anche in radio
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2023

Un team di astronomi guidati dall’Università di Stoccolma ha ricostruito l’ambiente di origine di una singolare supernova termonucleare. Le nette righe spettrali di emissione dell’elio e la rilevazione di emissione radio indicano che la compagna della nana bianca esplosa dovesse essere una stella ricca di elio
Density and isospin asymmetry dependence of high-momentum components
Creators: name: Rios, A.
name: Polls, A.
name: Dickhoff, W. H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the one-body momentum distribution at different densities in nuclear matter, with special emphasis on its components at high momentum. Explicit calculations for finite neutron-proton asymmetry, based on the ladder self-consistent Green's function approach, allow us to access the isospin dependence of momentum distributions and elucidate their role in neutron-rich systems. Comparisons with the deuteron momentum distribution indicate that a substantial proportion of high-momentum components are dominated by tensor correlations. We identify the density dependence of these tensor correlations in the momentum distributions. Further, we find that high-momentum components are determined by the density of each sub-species and we provide a new isospin asymmetry scaling of these components. We use different realistic nucleon-nucleon interactions to quantify the model dependence of our results.
description: 14 pages, 7 figures, 1 table. Accepted version in Phys. Rev. C
Conflict and consultation: Exploring visions of fair and sustainable dune management in coastal communities
Creators: name: Kummer, Katelyn
Publisher: name: The Australian National University
Year: 2014

description: Natural resource managers have increasingly recognised that communities need to be actively involved with decisions that affect their local landscapes and natural resources. Yet communities are rarely homogeneous, often having conflicting visions of what their local landscape should look like and how we should manage it as a resource. Managing social conflict and community opposition is becoming a more common feature of environmental management. In coastal environments especially there are often trade-offs between community outcomes and environmental outcomes, such as access versus preservation in coastal dune environments. By understanding the fairness dimensions of these conflicts decision-makers may be able to work towards more durable, participative governance of the environment. This research aimed to explore the specific justice and fairness dimensions of a dune management project at Long Beach, Batemans Bay on the coast of New South Wales. Planting the foreshore had previously been controversial and this community controversy led to the upheaval of an entire project. Another similar, more participatory, project was in the process of being implemented while the research was being carried out. The main research aims were then to identify and understand the key factors in conflicts over the environment and to explore the utility of theories of fairness in implementing participation in divided communities. A series of qualitative interviews were carried out with project participants and members of local organisations. Fairness was explored using the three dimensions of justice: interactional justice- how people were treated, procedural justice- how programs were implemented, and finally, distributive justice- the benefits and impacts of outcomes. The interviews combined with document analysis, revealed that the current project had been a marked shift towards more effective participation, but the community’s perception of historical injustices hindered full participation. There was still some division about the aims of the project, connected to a lack of shared vision between all parties, and linked to perceptions of historical injustice. Nevertheless, improved practice in participation dramatically increased community support and the viability of the project compared to previous attempts. Whilst this was a unique case study, with the implementation of climate change adaptation and more of an emphasis on locally implemented environmental programs, ensuring community acceptance and support of environmental projects will only increase in importance in the future. Challenges still remain in fostering an understanding of local histories and contexts from the perspective of the participants, especially in regards to interactional justice. Making the role of fairness explicit in participatory management might offer a way of increasing community support and, ultimately, achieving outcomes that are both sustainable and fair.
Electron-hole imbalance and large thermoelectric effect in superconducting hybrids with spin-active interfaces
Creators: name: Kalenkov, Mikhail S.
name: Zaikin, Andrei D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We argue that spin-sensitive quasiparticle scattering may generate electron-hole imbalance in superconducting structures, such as, e.g., superconducting-normal hybrids with spin-active interfaces. We elucidate a transparent physical mechanism for this effect demonstrating that scattering rates for electrons and holes at such interfaces differ from each other. Explicitly evaluating the wave functions of electron-like and hole-like excitations in superconducting-normal bilayers we derive a general expression for the thermoelectric current and show that -- in the presence of electron-hole imbalance -- this current can reach maximum values as high as the critical current of a superconductor.
description: 7 pages, 2 figures; published version
Orbital precession and other properties of two-body motion in the presence of dark energy
Creators: name: Bisnovatyi-Kogan, Gennady S.
name: Merafina, Marco
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We consider the Kepler two-body problem in the presence of a cosmological constant Lambda. Several dimensionless parameters characterizing the possible orbit typologies are used to identify open and closed trajectories. The qualitative picture of the two-body motion is described and critical parameters of the problem are found.
description: 21 pages, 9 figures
Costante di Hubble sotto la lente d’una supernova
Creators: Giuseppe Fiasconaro
Publisher: name: Media Inaf
Year: 2023

Misurato con un metodo indipendente che utilizza immagini multiple di una supernova generate da una lente gravitazionale, il valore della costante di Hubble sarebbe circa 66.6 km/s/Mpc: molto vicino a quello calcolato utilizzando la Cmb. «È la prima volta che mettiamo in pratica questo metodo, che prevede l’utilizzo di una supernova “lensata”», dice a Media Inaf Tommaso Treu (Ucla), tra gli autori di due studi – su Science e ApJ – che presentano il nuovo risultato
Bootstrap bounds on closed hyperbolic manifolds
Creators: name: Bonifacio, James
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Regular Article - Theoretical Physics
Differential and Algebraic Geometry
Conformal Field Theory
Field Theories in Higher Dimensions

description: The eigenvalues of the Laplace-Beltrami operator and the integrals of products of eigenfunctions must satisfy certain consistency conditions on compact Riemannian manifolds. These consistency conditions are derived by using spectral decompositions to write quadruple overlap integrals in terms of products of triple overlap integrals in multiple ways. In this paper, we show how these consistency conditions imply bounds on the Laplacian eigenvalues and triple overlap integrals of closed hyperbolic manifolds, in analogy to the conformal bootstrap bounds on conformal field theories. We find an upper bound on the gap between two consecutive nonzero eigenvalues of the Laplace-Beltrami operator in terms of the smaller eigenvalue, an upper bound on the smallest eigenvalue of the rough Laplacian on symmetric, transverse-traceless, rank-2 tensors, and bounds on integrals of products of eigenfunctions and eigentensors. Our strongest bounds involve numerically solving semidefinite programs and are presented as exclusion plots. We also prove the analytic bound $\lambda_{i+1} \leq 1/2+3 \lambda_i+\sqrt{\lambda_i^2+2 \lambda_i+1/4}$ for consecutive nonzero eigenvalues of the Laplace-Beltrami operator on closed orientable hyperbolic surfaces. We give examples of genus-2 surfaces that nearly saturate some of these bounds. To derive the consistency conditions, we make use of a transverse-traceless decomposition for symmetric tensors of arbitrary rank.
Webb trova acqua su una cometa vicina a casa
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2023

Per la prima volta, grazie al telescopio spaziale James Webb, è stata rilevata la presenza di vapore acqueo attorno a una cometa nella fascia principale degli asteroidi – la cometa 238P/Read – confermando che in quella regione può essere conservato ghiaccio d'acqua risalente al Sistema solare primordiale. Tuttavia, a differenza di altre comete, la cometa 238P/Read non presenta anidride carbonica
Law(lessness) and (dis)order
Creators: name: Widdis, Melissa Lynn
Publisher: name: No Publisher Supplied
Year: 2018

description: This dissertation examines how Hispanic Caribbean crime and detective fiction spanning the end of the twentieth century to the first decade of the twenty-first century pushes against classical conventions, modifies them to fit their social context, and some cases uproots the tenets of the genre altogether. I argue that crime fiction is indicative of the moral, social, and political values of a culture and its people, for it shows what crimes are acceptable and unacceptable through the representation of the processes of investigation and justice. In Chapter One I frame my reading of Virgilio Díaz Grullón’s “Crónica Policial,” Ana Lydia Vega’s “Pasión de historia,” Edgardo Rodríguez Juliá’s Sol de medianoche, and Leonardo Padura Fuentes’s Pasado Perfecto and Máscaras with models of classical detective fiction and theories of metafiction and postmodernism to show how they invert the mode of metafiction traditionally seen in the detective story and provoke the reader to question the relationship between fiction and reality. Chapter Two investigates the relationship between the Hispanic Caribbean detective and urban space in Sol de medianoche, Desamores (Wilfredo Mattos Cintrón), and Las puertas de la noche (Amir Valle Ojeda) and argues that they display an amalgamation of Baudelaire’s flâneur and de Certeau’s “practitioner” regarding their interaction with urban spaces. Like the flâneur, the detectives are active observers of their surroundings, but they are also actively engaged in their urban environments and give life and significance to their communities through their travels, observations, and resulting narratives. Similarly, the detectives featured in the third chapter are deeply entrenched in their milieu, which affects their cultural attitudes and professional investigations. I turn to theories of post-colonialism in my analysis of Candela by Rey Emmanuel Andújar and Que en vez de infierno encuentres gloria by Lorenzo Lunar Cardedo to reveal the detective as representing and negotiating the liminal space between oppressor and oppressed, thereby transcending the boundaries between authority and community and in so doing highlighting the dynamics of race, class, and social differences in the Hispanic Caribbean. In the final chapter I read Seva by Luis López Nieves, El crimen verde by Emilia Pereyra, and El hombre triángulo by Rey Emmanuel Andújar as works of crime and detective fiction even though they deviate radically from the normative structure of the genre by lacking either a detective or a crime. By putting these texts into dialogue, I illuminate how narratives utilize crime to portray the social realities of their time and place, as well as how they adapt and transform the detective genre, enabling the reader to understand the distinctive cultural complexities of the Hispanic Caribbean.
Gravitational Lensing of the CMB: a Feynman Diagram Approach
Creators: name: Jenkins, Elizabeth E.
name: Manohar, Aneesh V.
name: Waalewijn, Wouter J.
name: Yadav, Amit P. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We develop a Feynman diagram approach to calculating correlations of the Cosmic Microwave Background (CMB) in the presence of distortions. As one application, we focus on CMB distortions due to gravitational lensing by Large Scale Structure (LSS). We study the Hu-Okamoto quadratic estimator for extracting lensing from the CMB and derive the noise of the estimator up to ${\mathcal O}(ϕ^4)$ in the lensing potential $ϕ$. The previously noted large ${\mathcal O}(ϕ^4)$ term can be significantly reduced by a reorganization of the $ϕ$ expansion. Our approach makes it simple to obtain expressions for quadratic estimators based on any CMB channel. We briefly discuss other applications to cosmology of this diagrammatic approach, such as distortions of the CMB due to patchy reionization, or due to Faraday rotation from primordial axion fields.
description: 5 pages, 8 figures, v2: journal version
Saturno e le sue lune: raggiunta quota 145
Creators: Redazione Ansa
Publisher: name: Media Inaf
Year: 2023

Con 62 nuove lune appena scoperte, il Signore degli anelli torna a salire sul gradino più alto del podio dei pianeti con più satelliti naturali, riguadagnando il posto che aveva dovuto cedere a Giove pochi mesi fa. La scoperta è stata annunciata da un gruppo internazionale guidato dall’Istituto di astronomia e astrofisica dell’Accademia Sinica di Taiwan
Artisanal and Small-Scale Gold Mining in Bombana, South-East Sulawesi: Transport and Fluxes of Mercury in the Langkowala Estuary
Creators: name: Lamont, Zachariah
Publisher: name: The Australian National University
Year: 2018

description: The Bombana Regency, Southeast Sulawesi, Indonesia, experienced an explosion of artisanal and small-scale gold mining (ASGM) activity following local discoveries of alluvial gold in 2008. This had a range of deleterious impacts including the emission of mercury used in the gold extraction process. A field sampling study was conducted to investigate the sources, transport and fate of mercury in the Langkowala catchment. This research establishes baseline data for the study area, and contributes to an understanding of mercury dynamics in tropical, coastal catchments impacted by ASGM. The results showed low levels of mercury contamination in water and sediment, with the highest measured Hgt of 0.38 μg/L in river water falling within guidelines for drinking water published by the WHO (2011) and NWQMS (2016). However, there may still exist significant risks for miners and the wider community through direct occupational exposure to mercury and consumption of contaminated fish. Continued monitoring is needed to assess the long-term risks to the environment and inform strategies to reduce the mercury exposure risk for people who depend on the river for their livelihoods.
Là dove un tempo scorreva impetuoso un fiume
Creators: Jacopo Danieli
Publisher: name: Media Inaf
Year: 2023

Due immagini scattate di recente da Perseverance stanno ponendo nuovi interrogativi sugli antichi fiumi di Marte. Il rover si trova in una zona chiamata “unità curvilinea”, dove si possono osservare strati di sedimenti che disegnano nel paesaggio una serie di curve. La presenza di questi sedimenti e ciottoli di grandi dimensioni indica che un tempo in quell’area scorreva un corso d’acqua più profondo e impetuoso di quanto trovato finora sul Pianeta rosso
A Sheaf Model of the Algebraic Closure
Creators: name: Mannaa, Bassel
name: Coquand, Thierry
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: F.4.1

description: In constructive algebra one cannot in general decide the irreducibility of a polynomial over a field K. This poses some problems to showing the existence of the algebraic closure of K. We give a possible constructive interpretation of the existence of the algebraic closure of a field in characteristic 0 by building, in a constructive metatheory, a suitable site model where there is such an algebraic closure. One can then extract computational content from this model. We give examples of computation based on this model.
description: In Proceedings CL&C 2014, arXiv:1409.2593
2014-Jiri_Lebl-Notes_on_Diffy_Qs_Differential_Equations_for_Engineers
Creators: name: Lebl, Jiri
Publisher: name: QUBES Educational Resources
Year: 2023

description: There is a pdf and html version of the text as well as a purchasable paperback version. The text has pretty much all the basics, but has only a few exercises and there is very little modeling.
Rainfall change in central Australia, 1920-2013
Creators: name: Leech, Guy
Publisher: name: The Australian National University
Year: 2014

description: The interior of Australia experiences low average and highly variable rainfall, which influences its ecological and cultural significance. This variability stems from the numerous climatic drivers affecting the subtropics; these have been influencing rainfall declines in the south-east and south-west, and rainfall increases in the north-west, over the past 30–50 years. To investigate if such shifts have occurred in central Australia this thesis examined the timing and characteristics of rainfall shifts in the region between 1920 and 2013, as well as which climatic drivers may be influencing these shifts. Breakpoint analysis was used to establish when rainfall shifts occurred, using the AWAP and GPCC datasets, while breakpoint analysis and correlation maps were used to examine the influence of five drivers (ENSO, subtropical ridge latitude and pressure, IOD and SAM) and pressure and wind patterns on these shifts. A shift to increased annual, summer and spring (summer and autumn) rainfall and variability was found in the early 1970s (1990s), and a shift to increased winter rainfall variability in 1954. Multiple climatic drivers influenced each of these shifts: in the 1970s, the IOD (summer) and ENSO (spring); in the 1990s, changes in the relationship with the subtropical ridge (both seasons); and for 1954, changes in the ENSO, IOD and subtropical ridge. Long-term rainfall increases were also found, influenced by changes in pressure and winds over the Southern Ocean and a corresponding positive trend in the SAM, and/or the strengthening of the northern subtropical jet. These changes have undoubtedly impacted human activities and ecosystems in the region, and will continue to do so in future.
Comparison of particle trajectories and collision operators for collisional transport in nonaxisymmetric plasmas
Creators: name: Landreman, Matt
name: Smith, Håkan M
name: Mollén, Albert
name: Helander, Per
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this work, we examine the validity of several common simplifying assumptions used in numerical neoclassical calculations for nonaxisymmetric plasmas, both by using a new continuum drift-kinetic code and by considering analytic properties of the kinetic equation. First, neoclassical phenomena are computed for the LHD and W7-X stellarators using several versions of the drift-kinetic equation, including the commonly used incompressible-ExB-drift approximation and two other variants, corresponding to different effective particle trajectories. It is found that for electric fields below roughly one third of the resonant value, the different formulations give nearly identical results, demonstrating the incompressible ExB-drift approximation is quite accurate in this regime. However, near the electric field resonance, the models yield substantially different results. We also compare results for various collision operators, including the full linearized Fokker-Planck operator. At low collisionality, the radial transport driven by radial gradients is nearly identical for the different operators, while in other cases it is found to be important that collisions conserve momentum.
Measurement of the W-boson mass.
Creators: name: Abe, F
name: Amidei, D
name: Apollinari, G
name: Atac, M
name: Auchincloss, P
name: Baden, AR
name: Bamberger, A
name: Barbaro-Galtieri, A
name: Barnes, VE
name: Bedeschi, F
name: Behrends, S
name: Belforte, S
name: Bellettini, G
name: Bellinger, J
name: Bensinger, J
name: Beretvas, A
name: Berge, JP
name: Bertolucci, S
name: Bhadra, S
name: Binkley, M
name: Blair, R
name: Blocker, C
name: Booth, AW
name: Brandenburg, G
name: Brown, D
name: Buckley, E
name: Byon, A
name: Byrum, KL
name: Campagnari, C
name: Campbell, M
name: Carey, R
name: Carithers, W
name: Carlsmith, D
name: Carroll, JT
name: Cashmore, R
name: Cervelli, F
name: Chadwick, K
name: Chiarelli, G
name: Chinowsky, W
name: Cihangir, S
name: Clark, AG
name: Connor, D
name: Contreras, M
name: Cooper, J
name: Cordelli, M
name: Crane, D
name: Curatolo, M
name: Day, C
name: Dell'Agnello, S
name: Dell'Orso, M
name: Demortier, L
name: Derwent, PF
name: Devlin, T
name: DiBitonto, D
name: Drucker, RB
name: Elias, JE
name: Ely, R
name: Errede, S
name: Esposito, B
name: Flaugher, B
name: Foster, GW
name: Franklin, M
name: Freeman, J
name: Frisch, H
Publisher: name: Apollo - University of Cambridge Repository
Year: 1990
Subjects: Regular Article - Experimental Physics
Electroweak interaction
Hadron-Hadron scattering (experiments)
QCD
Forward physics

description: The $W$ boson mass is measured using proton-proton collision data at $\sqrt{s}=13$ TeV corresponding to an integrated luminosity of 1.7 fb$^{-1}$ recorded during 2016 by the LHCb experiment. With a simultaneous fit of the muon $q/p_T$ distribution of a sample of $W \to \mu\nu$ decays and the $\phi^*$ distribution of a sample of $Z\to\mu\mu$ decays the $W$ boson mass is determined to be \begin{equation*} m_{W} = 80354 \pm 23_{\rm stat} \pm 10_{\rm exp} \pm 17_{\rm theory} \pm 9_{\rm PDF}~\mathrm{MeV}, \end{equation*} where uncertainties correspond to contributions from statistical, experimental systematic, theoretical and parton distribution function sources. This is an average of results based on three recent global parton distribution function sets. The measurement agrees well with the prediction of the global electroweak fit and with previous measurements.
All’origine della più grande esplosione cosmica
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2023

Eventi come questo osservato da un team guidato dall'Università di Southampton sono estremamente rari: è un transiente di portata record, dura ormai da tre anni ed è cento volte più grande del Sistema solare. Francesca Onori (Inaf Abruzzo): «Abbiamo dimostrato come tale esplosione possa essere spiegata con la violenta distruzione di una vasta nube di gas e polveri da parte di un buco nero supermassiccio»
A microscopic mechanism for self-organized quasi periodicity in random networks of non linear oscillators
Creators: name: Burioni, Raffaella
name: Di Santo, Serena
name: di Volo, Matteo
name: Vezzani, Alessandro
Publisher: name: arXiv
Year: 2014
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Self-organized quasi periodicity is one of the most puzzling dynamical phases observed in systems of non linear coupled oscillators. The single dynamical units are not locked to the periodic mean field they produce, but they still feature a coherent behavior, through an unexplained complex form of correlation. We consider a class of leaky integrate-and-fire oscillators on random sparse and massive networks with dynamical synapses, featuring self-organized quasi periodicity, and we show how complex collective oscillations arise from constructive interference of microscopic dynamics. In particular, we find a simple quantitative relationship between two relevant microscopic dynamical time scales and the macroscopic time scale of the global signal. We show that the proposed relation is a general property of collective oscillations, common to all the partially synchronous dynamical phases analyzed. We argue that an analogous mechanism could be at the origin of similar network dynamics.
description: to appear in Phys. Rev. E
Collaborative Wireless Energy and Information Transfer in Interference Channel
Creators: name: Lee, Seunghyun
name: Liu, Liang
name: Zhang, Rui
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper studies the simultaneous wireless information and power transfer (SWIPT) in a multiuser wireless system, in which distributed transmitters send independent messages to their respective receivers, and at the same time cooperatively transmit wireless power to the receivers via energy beamforming. Accordingly, from the wireless information transmission (WIT) perspective, the system of interest can be modeled as the classic interference channel, while it also can be regarded as a distributed multiple-input multiple-output (MIMO) system for collaborative wireless energy transmission (WET). To enable both information decoding (ID) and energy harvesting (EH) in SWIPT, we adopt the low-complexity time switching operation at each receiver to switch between the ID and EH modes over scheduled time. Based on this hybrid model, we aim to characterize the achievable rate-energy (R-E) trade-offs in the multiuser SWIPT system under various transmitter-side collaboration schemes. Specifically, to facilitate the collaborative energy beamforming, we propose a new signal splitting scheme at the transmitters, where each transmit signal is generally composed of an information signal component and an energy signal component for WIT and WET, respectively. With this new scheme, first, we study the two-user SWIPT system and derive the optimal mode switching rule at the receivers and the corresponding transmit signal optimization to achieve various R-E trade-offs over the fading channel. We also compare the R-E performance of our proposed scheme with transmit energy beamforming and signal splitting against two existing schemes with partial or no cooperation of the transmitters, and show remarkable gains over these baseline schemes. Finally, the general case of SWIPT systems with more than two users is studied, for which we propose and compare two practical transmit collaboration schemes.
description: To appear in IEEE Transactions on Wireless Communications
Aurelis-Praxisstudie: Wie Corporates die Märkte und das Management für produktionsnahe Immobilien einschätzen
Creators: name: Just, Tobias
name: Pfnür, Andreas
name: Braun, Christian
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: 330 Wirtschaft

description: Dieses Arbeitspapier ist identisch mit: Tobias Just, Andreas Pfnür und Christian Braun (2016): Aurelis-Praxisstudie: Wie Corporates die Märkte und das Management für produktionsnahe Immobilien einschätzen. In: Andreas Pfnür (Hrsg.), Arbeitspapiere zur immobilienwirtschaftlichen Forschung und Praxis, Band 33.