cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Machine Learning practices and infrastructures
Creators: name: Berman, Glen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Machine Learning (ML) systems, particularly when deployed in high-stakes domains, are deeply consequential. They can exacerbate existing inequities, create new modes of discrimination, and reify outdated social constructs. Accordingly, the social context (i.e. organisations, teams, cultures) in which ML systems are developed is a site of active research for the field of AI ethics, and intervention for policymakers. This paper focuses on one aspect of social context that is often overlooked: interactions between practitioners and the tools they rely on, and the role these interactions play in shaping ML practices and the development of ML systems. In particular, through an empirical study of questions asked on the Stack Exchange forums, the use of interactive computing platforms (e.g. Jupyter Notebook and Google Colab) in ML practices is explored. I find that interactive computing platforms are used in a host of learning and coordination practices, which constitutes an infrastructural relationship between interactive computing platforms and ML practitioners. I describe how ML practices are co-evolving alongside the development of interactive computing platforms, and highlight how this risks making invisible aspects of the ML life cycle that AI ethics researchers' have demonstrated to be particularly salient for the societal impact of deployed ML systems.
A Deeper Look into Wild Horse Management in the United States; A Proposal for Humane and Sustainable Practices
Creators: name: Alcini, Sandra
Publisher: name: Zenodo
Year: 2023
Subjects: wild horse, burro, Bureau of Land Management, taxonomy, public lands, public land management, United States History, cowboy mentality, social construct, Native American, Indigenous

description: Wild horse taxonomy and management are outdated and must be re-examined. This paper explores the history of wild horses and wild horse and burro management, telling the strory to present day mismanagement under auspices of the federal government. Public lands lack desperately needed biodiversity, and the lack of biodiversity is now being used as an excuse to further degrade public lands. Horses and burros are grossly misunderstood and are being abused and incarcerated. Wild horse removal and subsequent use of their habitat costs US taxpayers nearly $1M per day.
description: Early Indigenous removal is explored and current work of tribal councils are acknowledged regarding public land and wildlife. The social construction of the "cowboy mentality" is deconstructed.
Cross-correlation of Planck CMB Lensing and CFHTLenS Galaxy Weak Lensing Maps
Creators: name: Liu, Jia
name: Hill, J. Colin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We cross-correlate cosmic microwave background (CMB) lensing and galaxy weak lensing maps using the Planck 2013 and 2015 data and the 154 deg^2 Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS). This measurement probes large-scale structure at intermediate redshifts ~0.9, between the high- and low-redshift peaks of the CMB and CFHTLenS lensing kernels, respectively. Using the noise properties of these data sets and standard Planck 2015 LCDM cosmological parameters, we forecast a signal-to-noise ratio ~4.6 for the cross-correlation. We find that the noise level of our actual measurement agrees well with this estimate, but the amplitude of the signal lies well below the theoretical prediction. The best-fit amplitudes of our measured cross-correlations are $A_{2013}=0.48\pm0.26$ and $A_{2015}=0.44\pm0.22$ using the 2013 and 2015 Planck CMB lensing maps, respectively, where $A=1$ corresponds to the fiducial Planck 2015 LCDM prediction. Due to the low measured amplitude, the detection significance is moderate (~2$σ$) and the data are in tension with the theoretical prediction (~2-$2.5σ$). The tension is reduced somewhat when compared to predictions using WMAP9 parameters, for which we find $A_{2013}=0.56\pm0.30$ and $A_{2015}=0.52\pm0.26$. We consider various systematic effects, finding that photometric redshift uncertainties, contamination by intrinsic alignments, and effects due to the masking of galaxy clusters in the Planck 2015 CMB lensing reconstruction are able to help resolve the tension at a significant level (~10% each). An overall multiplicative bias in the CFHTLenS shear data could also play a role, which can be tested with existing data. We close with forecasts for measurements of this cross-correlation using ongoing and future weak lensing surveys, which will definitively test the significance of the tension in our results with respect to LCDM.
description: 11 pages, 7 figures. The manuscript has been revised and matches published version
Entanglement Distribution in Quantum Repeater with Purification and Optimized Buffer Time
Creators: name: Zang, Allen
name: Chen, Xinan
name: Kolar, Alexander
name: Chung, Joaquin
name: Suchara, Martin
name: Zhong, Tian
name: Kettimuthu, Rajkumar
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum repeater networks that allow long-distance entanglement distribution will be the backbone of distributed quantum information processing. In this paper we explore entanglement distribution using quantum repeaters with optimized buffer time, equipped with noisy quantum memories and performing imperfect entanglement purification and swapping. We observe that increasing the number of memories on end nodes leads to a higher entanglement distribution rate per memory and higher probability of high-fidelity entanglement distribution, at least for the case with perfect operations. When imperfect operations are considered, however, we make the surprising observation that the per-memory entanglement rate decreases with increasing number of memories. Our results suggest that building quantum repeaters that perform well under realistic conditions requires careful modeling and design that takes into consideration the operations and resources that are finite and imperfect.
description: 6 pages, 4 figures, IEEE INFOCOM'23 NetSciQCom 2023
MyGene2 automated match report: CSPP1
Creators: name: Team, The MyGene2
Publisher: name: Figshare
Year: 2016
Subjects: subject: 110311 Medical Genetics (excl. Cancer Genetics)
subject: FOS: Basic medicine

description: MyGene2.org is free, public, searchable & browsable website. Families with rare genetic conditions, clinicians, and researchers families who are interested in sharing health and genetic information can create MyGene2 profiles and use these to connect with other families, clinicians, and researchers who may have or be studying the same condition. If multiple MyGene2 profiles potentially match on a shared gene of interest, MyGene2 automatically generates a match report summarizing the information in these profiles. This automated match report is shared publicly to help facilitate further research and/or connections between the submitters of the MyGene2 profiles and other interested parties. This is an automated match report for CSPP1.
Role of Se vacancies on Shubnikov de Haas oscillations in Bi2Se3: a combined magneto-resistance and positron annihilation study
Creators: name: Devidas, T. R.
name: Amaladass, E. P.
name: Sharma, Shilpam
name: Rajaraman, R.
name: Sornadurai, D.
name: Subramanian, N.
name: Mani, Awadhesh
name: Sundar, C. S.
name: Bharathi, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magneto resistance measurements coupled with positron lifetime measurements, to characterize the vacancy type defects, have been carried out on the topological insulator (TI) system Bi2Se3, of varying Se/Bi ratio. Pronounced Shubnikov de Haas (SdH) oscillations are seen in nominal Bi2Se3.1 crystals for measurements performed in magnetic fields up to 15 T in the 4 K to 10 K temperature range, with field applied perpendicular to the (001) plane of the crystal. The quantum oscillations, characteristic of 2D electronic structure, are seen only in the crystals that have a lower concentration of Se vacancies, as inferred from positron annihilation spectroscopy.
description: 3 pages, 7 figures
First results from BRASS-p broadband searches for hidden photon dark matter
Creators: name: Bajjali, Fayez
name: Dornbusch, Sven
name: Ekmedžić, Marko
name: Horns, Dieter
name: Kasemann, Christoph
name: Lobanov, Andrei
name: Mkrtchyan, Artak
name: Nguyen, Le Hoang
name: Tluczykont, Martin
name: Tuccari, Gino
name: Ulrichs, Johannes
name: Wieching, Gundolf
name: Zensus, Anton
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We discuss first results from hidden photon dark matter searches made with a prototype of the Broadband Radiometric Axion/ALPs Search Setup (BRASS-p) in the range of particle mass of 49.63-74.44 $μ$eV (frequency range of 12-18 GHz). The conceptual design of BRASS and a detailed description of its present prototype, BRASS-p, are given, with a view of the potential application of such setups to hidden photon, axion, and axion-like particle (ALP) dark matter searches using heterodyne detectors in the range of particle mass from 40$μ$eV to 4000$μ$eV (10 GHz to 1 THz). Pioneering measurements made with BRASS-p achieve the record sensitivity of (0.3--1.0)$\times$$10^{-13}$ to the kinetic mixing between the normal and hidden photons, assuming the dark matter is made entirely of unpolarized hidden photons. Based on these results, a discussion of further prospects for dark matter searches using the BRASS-p apparatus is presented.
description: 17 pages, 13 figures. Prepared for submission to JCAP
Resistance of a Rotating-Moving Brane with Background Fields Against Collapse
Creators: name: Kamani, Davoud
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using the boundary state formalism we investigate the effect of tachyon condensation process on a rotating and moving D$p$-brane with various background fields in the bosonic string theory. The rotation and motion are inside the brane volume. We demonstrate that some specific rotations and/or motions can preserve the brane from instability and collapse.
description: 11 pages, Latex, No figure
‘A Global History of Humanity’: a high school textbook to change the world
Creators: name: Bernardi, Claudia
name: Vanhaute, Eric
Publisher: name: Didattica della storia – Journal of Research and Didactics of History
Year: 2020
Subjects: History; Education; Didactic; Global Citizenship; Textbook

description: This paper aims at presenting the forthcoming school textbook ‘A Global History of Humanity’ that spans from 70.000 BCE till the 21st century and narrates a global history of our world assuming a non-Eurocentric and non-nationalist perspective. The textbook covers the history of humanity through three volumes, combining a chronological and a thematic approach. Each volume is divided into three chronological chapters. Each chapter presents the four themes in which the textbook is structured: humans change nature; humans on the move; social organization and inequality; worldviews. The last part of this paper ties the long history of humanity narrated through the textbook to today’s central questions, discussing the conditions in which we find ourselves today and the challenges we are facing in the coming years.
description: Didattica della storia – Journal of Research and Didactics of History, Vol 2, No 1S (2020): Monograph “Horizons of the didactics of History"
Formation of an observed eruptive flux rope above the torus instability threshold through tether-cutting magnetic reconnection
Creators: name: Prasad, Avijeet
name: Kumar, Sanjay
name: Sterling, Alphonse C.
name: Moore, Ronald L.
name: Aulanier, Guillaume
name: Bhattacharyya, R.
name: Hu, Qiang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Erupting magnetic flux ropes (MFRs) play a crucial role in producing solar flares. However, the formation of erupting MFRs in complex coronal magnetic configurations and their subsequent evolution in the flaring events are not fully understood. We performed an MHD simulation of active region NOAA 12241 to understand the formation of a rising MFR during the onset of an M6.9 flare on 2014 December 18, around 21:41 UT. The MHD simulation was initialised with an extrapolated non-force-free magnetic field generated from the photospheric vector magnetogram of the active region taken a few minutes before the flare. The initial magnetic field topology displays a pre-existing sheared arcade enveloping the polarity inversion line. The simulated dynamics exhibit the movement of the oppositely directed legs of the sheared arcade field lines towards each other due to the converging Lorentz force, resulting in the onset of tether-cutting magnetic reconnection that produces an underlying flare arcade and flare ribbons. Concurrently, an MFR above the flare arcade develops inside the sheared arcade and shows a rising motion. The MFR is found to be formed in a torus-unstable region, thereby explaining its eruptive nature. Interestingly, the location and rise of the rope are in good agreement with the corresponding observations seen in EUV channels. Furthermore, the foot points of the simulation's flare arcade match well with the location of the observed parallel ribbons of the flare. The presented simulation supports the development of the MFR by the tether-cutting magnetic reconnection inside the sheared coronal arcade during flare onset. The MFR is then found to extend along the polarity inversion line (PIL) through slip-running reconnection. The MFR's eruptive nature is ascribed both to its formation in the torus-unstable region and also to the runaway tether-cutting reconnection.
description: 12 pages, 8 figures, accepted for publication in Astronomy & Astrophysics
Atypical sliding and Moire ferroelectricity in pure multilayer graphene
Creators: name: Yang, Liu
name: Ding, Shiping
name: Gao, Jinhua
name: Wu, Menghao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Most non-ferroelectric two-dimensional materials can be endowed with so-called sliding ferroelectricity via non-equivalent homo-bilayer stacking, which is not applicable to mono-element systems like pure graphene bilayer with inversion symmetry at any sliding vector. Herein we show first-principles evidence that multilayer graphene with N>3 can all be ferroelectric, where the polarizations of polar states stem from the symmetry breaking in stacking configurations of across-layer instead of adjacent-layer, which are electrically switchable via interlayer sliding. The non-polar states can also be electrically driven to polar states via sliding, all nearly degenerate in energy, and more diverse states with distinct polarizations will emerge in more layers. In contrast to the ferroelectric Moire domains with opposite polarization directions in twisted bilayers reported previously, the Moire pattern in some multilayer graphene systems (e.g., twisted monolayer-trilayer graphene) possess nonzero net polarizations with domains of the same direction separated by non-polar regions, which can be electrically reversed upon interlayer sliding. The distinct Moire bands of two polar states should facilitate electrical detection of such sliding Moire ferroelectricity during switching.
title:  La adquisición de la nacionalidad en España
Creators: name: Meix Cereceda, Pablo
Publisher: name: Roma TrE-Press
Year: 2018

description: This paper discusses the modes of acquisition of nationality under Spanish law with the primary aim of enriching the discussion on the Italian bill proposal. Before examining the legal rules in the Spanish Código Civil, the text seeks to clarify the constitutional meaning of the terms nacionalidad and ciudadanía in the Spanish Constitution of 1978. The six modes of acquisition are subsequently discussed: ius sanguinis; qualified ius soli; option; putative possession; residence; and lastly, naturalization (the 2015 bill for the Sephardim deserves specific consideration here).
description: Democrazia e Sicurezza – 2017, n. 4
OPERE D�ARTE BIZANTINA IN LOMBARDIA. LINEAMENTI PER UN CATALOGO (SECOLI IV-XV).
Creators: name: FLAMINE, MARCO
Publisher: name: Universit� degli Studi di Milano
Year: 2015

description: This research focuses on Byzantine works of art (IV-XV centuries) in public collections in Lombardy. Milan, was connected to Byzantium politically, religiously and commercially since Late Antiquity. New research has been conducted on the metal works of the Museo e Tesoro del Duomo di Monza, on the bronze snake of the Basilica of Sant?Ambrogio in Milan, on the frescoes of Santa Maria Foris Portas at Castelseprio (Varese) and also on illuminated manuscripts. This dissertation is structured with a series of catalogue entries, with particular attention to the sculptures, ivories, jewelry, textiles, and also an astrolabe.
title:  L’evoluzione della legge sulla cittadinanza a Malta e Cipro: profili storico-giuridici e sviluppi recenti
Creators: name: Di Maio, Claudio
Publisher: name: Roma TrE-Press
Year: 2018

description: After the 2004 enlargement, Cyprus and Malta have become EU members. Despite the same geography and British colonial past, the development of citizenship in these countries was unique and distinct, even for the different roads that led to independence. This article discusses the evolution of citizenship laws of these legal orders, highlighting the main features and the latest developments.
description: Democrazia e Sicurezza – 2017, n. 4
Impact of gate-level clustering on automated system partitioning of 3D-ICs
Creators: name: Delhaye, Quentin
name: Beyne, Eric
name: Goossens, Joël
name: Van der Plas, Geert
name: Milojevic, Dragomir
Publisher: name: arXiv
Year: 2023
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences
subject: B.7.2

description: When partitioning gate-level netlists using graphs, it is beneficial to cluster gates to reduce the order of the graph and preserve some characteristics of the circuit that the partitioning might degrade. Gate clustering is even more important for netlist partitioning targeting 3D system integration. In this paper, we make the argument that the choice of clustering method for 3D-ICs partitioning is not trivial and deserves careful consideration. To support our claim, we implemented three clustering methods that were used prior to partitioning two synthetic designs representing two extremes of the circuits medium/long interconnect diversity spectrum. Automatically partitioned netlists are then placed and routed in 3D to compare the impact of clustering methods on several metrics. From our experiments, we see that the clustering method indeed has a different impact depending on the design considered and that a circuit-blind, universal partitioning method is not the way to go, with wire-length savings of up to 31%, total power of up to 22%, and effective frequency of up to 15% compared to other methods. Furthermore, we highlight that 3D-ICs open new opportunities to design systems with a denser interconnect, drastically reducing the design utilization of circuits that would not be considered viable in 2D.
description: 8 pages, 6 figures
Toward an accurate modelling of convective boundaries in F-type stars
Creators: name: Deal, Morgan
name: Goupil, Marie-Jo
name: Philidet, Jordan
name: Cunha, Margarida S.
name: Teissonniere, Romain
name: Josselin, Eric
Publisher: name: Zenodo
Year: 2024

description: The transport of chemical elements in main-sequence stars is still far from being understood and is responsible for large uncertainties in stellar models. The study of the signatures of seismic acoustic glitches in solar-like oscillations has proven successful in revealing internal stellar features such as the helium second-ionisation zone and the location of the base of the surface convective zone. The latter is particularly important for chemical transport, as it strongly affects the efficiency of atomic diffusion, especially in F-type stars. Furthermore, the complex signature of the glitch in the r_010 ratios currently prevents any measurement of the extent of the convective core, which is particularly important for constraining the core overshoot and determining the accurate age of these stars. In this talk, we present an analytical development that links the physical conditions in the penetrative convective (PC) region to the signature in the r_010 frequency ratios. We apply this model to Kepler Legacy F-type stars and show that if the envelope PC is responsible for the signature in the observed r_010 ratios, then the PC extends much deeper than in the Sun for the hotter stars. We present different ways of interpreting these results by revisiting the standard approach to measuring glitch signatures. This opens up new possibilities to constrain the transport of chemicals in these stars and to improve their current modelling in stellar evolution models.
title: Inference using Gaussian processes in animal movement modelling
Creators: name: Paun, Ionut Alexandru
Publisher: name: University of Glasgow
Year: 2022

description: In recent years, the field of movement ecology has been changed dramatically by the capacity to collect accurate high-frequency telemetry data. In this thesis I present new statistical methods scalable to very large volumes of data being generated as there is a problem of scale dependence in most popular animal movement models. Popular and widely used movement models in ecology are discrete-time movement models, where animals’ positions are observed at discrete times. However, discrete-time models do not perform well when problems such as missing or irregular data are present. A remedy to the inefficiency of discrete-time movement models is to use continuous-time movement models, however the formulation of continuous-time movement models is often difficult and hard to interpret. In this thesis, I first focus on discrete-time movement models, where through a study I illustrate one of the problems that discrete-time movement models pose - the specification in advance of the discretisation time-step. I then move on to probabilistic methods, widely used in the machine learning community, Gaussian processes (GPs), and I show that they are equivalent to many continuous-time movement models. Given that the primary goal of machine learning methods is to learn from large scale datasets, using robust continuous-time movement models such as Gaussian processes is highly advantageous for multiple reasons. These include their flexibility in choosing various covariance functions, their scalability to large datasets and their ability to analyse data, infer parameters of interest and quantify uncertainty within a nonparametric Bayesian approach. I extend the standard Gaussian process (GP) into a non-stationary hierarchical Gaussian process, where both the movement process and the dynamic parameters of the movement model are Gaussian processes, which allows for increased flexibility to a wide range of behaviour modes that animals can exhibit. Throughout this thesis, I implement Gaussian processes on simulated and real tracking data using statistical libraries such as TensorFlow, which provide an accessible way to implement the model and gain access to GPU/HPC-accelerated machine learning libraries. I perform inference using optimisation methods such as maximum-a-posteriori (MAP) estimation, approximate sampling based inference methods such as Markov Chain Monte Carlo (MCMC) and variational inference methods on both synthetic and real datasets.
title:  La disciplina della cittadinanza in Grecia. Il percorso accidentato dello ius soli temperato e il tardivo abbandono di antichi feticci
Creators: name: Aravantinou Leonidi, Giulia
Publisher: name: Roma TrE-Press
Year: 2018

description: This research addresses the delicate issue of the right to citizenship in Greece, mainly drawing on a comparative approach to the legal framework set in this country within the broader European context.
description: Democrazia e Sicurezza – 2017, n. 4
The structural properties of multiple populations in the dynamically young globular cluster NGC 2419
Creators: name: Onorato, Silvia
name: Cadelano, Mario
name: Dalessandro, Emanuele
name: Vesperini, Enrico
name: Lanzoni, Barbara
name: Mucciarelli, Alessio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: NGC 2419 is likely the globular cluster (GC) with the lowest dynamical age in the Galaxy. This makes it an extremely interesting target for studying the properties of its multiple populations (MPs), as they have been likely affected only modestly by long-term dynamical evolution effects. Here we present for the first time a detailed analysis of the structural and morphological properties of the MPs along the whole extension of this remote and massive GC by combining high-resolution HST and wide-field ground-based data. In agreement with formation models predicting that second population (SP) stars form in the inner regions of the first population (FP) system, we find that the SP is more centrally concentrated than the FP. This may provide constraints on the relative concentrations of MPs in the cluster early stages of the evolutionary phase driven by two-body relaxation. In addition, we find that the fraction of FP stars is larger than expected from the general trend drawn by Galactic GCs. If, as suggested by a number of studies, NGC 2419 formed in the Sagittarius dwarf galaxy and was later accreted by the Milky Way, we show that the observed FP fraction may be explained as due to the transition of NGC 2419 to a weaker tidal field (its current Galactocentric distance is d_gc~95 kpc) and consequently to a reduced loss rate of FP stars.
description: Accepted for publication in A&A
title:  L’educazione finanziaria ai tempi del bail in
Creators: name: Rossi, Paolo
Publisher: name: Roma TrE-Press
Year: 2018

description: The recent global financial crisis, which has pervasively affected the entire world economy, has brought general attention to the question not only of strengthening the regulatory system of protection of the consumer‐saver, but also of fostering greater awareness of information and knowledge of the financial market, in which the small investor is, too often, an unaware victim. In this sense, the Author, moving from financial literacy as a means of protection and financial inclusion, focuses on the community measures dedicated to financial education, highlighting its persistent inadequacy; to then focus on Italy, where, after the traumatic advent of the bail in and the new community measures after the financial crisis and the intensification of the crises of the domestic banks, the legislator, with the law n. 15/2017, intervened on the subject: a first, though timid, step towards a concrete strategy of financial education, never so necessary, to protect the ʺsaverʺ from the moral hazard of the market, making it, in this way, less insecure in the investment of own savings.
description: Democrazia e Sicurezza – 2017, n. 4
A Transparência do Passado: Alterações em Vidros Incolores na Arquitetura Mortuária do Cemitério de Nossa Senhora do Soledade
Creators: name: Luiza Ferreira Mota
name: Amanda Monteiro Corrêa Pinto Loureiro
Publisher: name: Zenodo
Year: 2024

description: As alterações dos vidros incolores em ambientes expostos, como na arquitetura mortuária, são influenciadas por fatores climáticos e ambientais que comprometem sua transparência e integridade. Corrosão, irisação, destacamentos, desenvolvimento microbiológico e sujidade, são os principais tipos de alteração, que afetam a estética e o valor simbólico de vidros inseridos em bens culturais. Estudos também comprovam que a orientação na qual os vidros são inseridos em um edifício é outro fator que gera diferenças no estado de conservação desse material. O objetivo deste trabalho é identificar as alterações que afetam a superfície dos vidros incolores presentes em dois mausoléus do cemitério Nossa Senhora da Soledade, devido às condições climáticas de Belém, comprometendo a sua transparência. Assim, procedeu-se com a coleta de amostras de vidros presentes nos portões de acesso de dois mausoléus com a fachada orientadas a nordeste e sudoeste. As técnicas analíticas utilizadas foram: microscopia ótica, fluorescência de raios-X, microscopia eletrônica de varredura e espectroscopia por energia dispersiva. Resultados indicam a presença de camadas de corrosão, deposição de sais e formação de microfissuras nos vidros, atribuídas à alta umidade e temperatura de Belém. Também observou-se um aumento da opacidade ao longo do tempo possivelmente decorrente da falta de ventilação e iluminação no interior dos mausoléus, assim como sua a orientação acelerando o processo de alteração da superfície dos vidros. Este estudo contribui para a compreensão dos mecanismos de deterioração e oferece bases para estratégias de conservação mais eficazes para regiões tropicais.
A true relative of Suslin's normality theorem
Creators: name: Nica, Bogdan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 19B37, 20H05

description: We prove a normality theorem for the "true" elementary subgroups of $SL_n(A)$ defined by the ideals of a commutative unital ring $A$. Our result is an analogue of a normality theorem, due to Suslin, for the standard elementary subgroups, and it greatly generalizes a theorem of Mennicke.
description: to appear in L'Enseignement Mathematique
title:  La rotta del Mediterraneo Centrale: le spinte migratorie, i percorsi tracciati e il profilo socioeconomico dei migranti sbarcati in Italia
Creators: name: Terenzi, Giacomo
Publisher: name: Roma TrE-Press
Year: 2018

description: The vast majority of migrants arrived in Europe during the last years, crossed the Mediterranean Sea after an irregular and extremely dangerous journey along the African desert. Migrants on the move are in many cases victims of trafficking, human rights abuses and violence. Their migration projects are often planned by transnational criminal networks that are increasing the States’ national security concerns. Through the description of the African contemporary migration routes towards Europe, the major difficulties encountered by migrants during the journey, as well as of their socioeconomic profile and future expectations upon arrival in Italy, the article highlights the need for more and better information, at the same time in the countries of origin, transit and destination. The analysis of the migrants’ flows aims at contributing to a more evidence‐based discussion on migration, facilitating policy‐makers in the reformulation of an efficient and long‐lasting migration strategy.
description: Democrazia e Sicurezza – 2017, n. 4
The Music Works of Nicolas Astrinidis (1992)
Creators: name: Chrissochoidis, Ilias
Publisher: name: Stanford Digital Repository
Year: 2026
Subjects: subject: Nicolas Astrinidis
subject: Νίκος Αστρινίδης
subject: Greeks--Music
subject: Greeks--Music--History and criticism
subject: Greek Diaspora

description: The first study of the life and works of Greek Diaspora composer Nicolas Astrinidis (1921-2010). Includes biography, chronological and systematic work catalogs, analysis of representative works, and appendices. B.A. thesis, Aristotle University of Thessaloniki, 1992. In Greek.
New filamentary remnant radio emission and duty cycle constraints in the radio galaxy NGC 6086
Creators: name: Candini, S.
name: Brienza, M.
name: Bonafede, A.
name: Rajpurohit, K.
name: Biava, N.
name: Murgia, M.
name: Loi, F.
name: van Weeren, R. J.
name: Vazza, F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Radio galaxies are a subclass of active galactic nuclei in which accretion onto the supermassive black hole releases energy via relativistic jets. The jets are not constantly active throughout the life of the host galaxy and alternate between active and quiescent phases. Remnant radio galaxies are detected during a quiescent phase and define a class of unique sources to constrain the AGN duty cycle. We present, a spatially resolved radio analysis of the radio galaxy associated with NGC 6086 and constraints on the spectral age of the diffuse emission to investigate the duty cycle and evolution of the source. We use three new low-frequency, high-sensitivity observations, performed with the Low Frequency Array at 144 MHz and with the upgraded Giant Metrewave Radio Telescope at 400 MHz and 675 MHz. To these, we add two Very Large Array archival observations at 1400 and 4700 MHz. In the new observations, we detect a second pair of larger lobes and three regions with a filamentary morphology. We analyse the spectral index trend in the inner remnant lobes and see systematic steeper values at the lower frequencies compared to the GHz ones. Steeper spectral indices are found in the newly detected outer lobes (up to 2.1), as expected if they trace a previous phase of activity of the AGN. However, the differences between the spectra suggest different dynamical evolution within the intragroup medium during their expansion and/or different magnetic field values. We place constraints on the age of the inner and outer lobes and derive the duty cycle of the source. This results in a total active time of $\sim$39%. The filamentary structures have a steep spectral index ($\sim$1) without any spectral index trend and only one of them shows a steepening in the spectrum. Their origin is not yet clear, but they may have formed due to the compression of the plasma or due to magnetic field substructures.
description: 19 pages, 11(+5) figures, 6 tables. Astronomy & Astrophysics: Received: 30 May 2022 - Accepted: 21 June 2022
A transparência do passado: alterações em vidros incolores na arquitetura mortuária do cemitério de nossa senhora do soledade
Creators: name: Ferreira Mota, Luiza
name: Monteiro Corrêa Pinto Loureiro, Amanda
Publisher: name: Zenodo
Year: 2024

description: As alterações dos vidros incolores em ambientes expostos, como na arquitetura mortuária, são influenciadas por fatores climáticos e ambientais que comprometem sua transparência e integridade. Corrosão, irisação, destacamentos, desenvolvimento microbiológico e sujidade, são os principais tipos de alteração, que afetam a estética e o valor simbólico de vidros inseridos em bens culturais. Estudos também comprovam que a orientação na qual os vidros são inseridos em um edifício é outro fator que gera diferenças no estado de conservação desse material. O objetivo deste trabalho é identificar as alterações que afetam a superfície dos vidros incolores presentes em dois mausoléus do cemitério Nossa Senhora da Soledade, devido às condições climáticas de Belém, comprometendo a sua transparência. Assim, procedeu-se com a coleta de amostras de vidros presentes nos portões de acesso de dois mausoléus com a fachada orientadas a nordeste e sudoeste. As técnicas analíticas utilizadas foram: microscopia ótica, fluorescência de raios-X, microscopia eletrônica de varredura e espectroscopia por energia dispersiva. Resultados indicam a presença de camadas de corrosão, deposição de sais e formação de microfissuras nos vidros, atribuídas à alta umidade e temperatura de Belém. Também observou-se um aumento da opacidade ao longo do tempo possivelmente decorrente da falta de ventilação e iluminação no interior dos mausoléus, assim como sua a orientação acelerando o processo de alteração da superfície dos vidros. Este estudo contribui para a compreensão dos mecanismos de deterioração e oferece bases para estratégias de conservação mais eficazes para regiões tropicais.
A cryogenic SRAM based arbitrary waveform generator in 14 nm for spin qubit control
Creators: name: Prathapan, Mridula
name: Mueller, Peter
name: Menolfi, Christian
name: Braendli, Matthias
name: Kossel, Marcel
name: Francese, Pier Andrea
name: Heim, David
name: Oropallo, Maria Vittoria
name: Ruffino, Andrea
name: Zota, Cezar
name: Morf, Thomas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Signal Processing (eess.SP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Realization of qubit gate sequences require coherent microwave control pulses with programmable amplitude, duration, spacing and phase. We propose an SRAM based arbitrary waveform generator for cryogenic control of spin qubits. We demonstrate in this work, the cryogenic operation of a fully programmable radio frequency arbitrary waveform generator in 14 nm FinFET technology. The waveform sequence from a control processor can be stored in an SRAM memory array, which can be programmed in real time. The waveform pattern is converted to microwave pulses by a source-series-terminated digital to analog converter. The chip is operational at 4 K, capable of generating an arbitrary envelope shape at the desired carrier frequency. Total power consumption of the AWG is 40-140mW at 4 K, depending upon the baud rate. A wide signal band of 1-17 GHz is measured at 4 K, while multiple qubit control can be achieved using frequency division multiplexing at an average spurious free dynamic range of 40 dB. This work paves the way to optimal qubit control and closed loop feedback control, which is necessary to achieve low latency error mitigation
description: 4 pages, IEEE ESSCIRC 2022 conference
An enumerative formula for the spherical cap discrepancy
Creators: name: Heitsch, Holger
name: Henrion, René
Publisher: name: Weierstrass Institute
Year: 2020
Subjects: subject: Spherical cap discrepancy
subject: uniform distribution on sphere
subject: optimality conditions
subject: 11K38
subject: 90C15

description: The spherical cap discrepancy is a widely used measure for how uniformly a sample of points on the sphere is distributed. Being hard to compute, this discrepancy measure is typically replaced by some lower or upper estimates when designing optimal sampling schemes for the uniform distribution on the sphere. In this paper, we provide a fully explicit, easy to implement enumerative formula for the spherical cap discrepancy. Not surprisingly, this formula is of combinatorial nature and, thus, its application is limited to spheres of small dimension and moderate sample sizes. Nonetheless, it may serve as a useful calibrating tool for testing the efficiency of sampling schemes and its explicit character might be useful also to establish necessary optimality conditions when minimizing the discrepancy with respect to a sample of given size.
Optically Induced Picosecond Lattice Compression in the Dielectric Component of a Strongly Coupled Ferroelectric/Dielectric Superlattice
Creators: name: Gyan, Deepankar Sri
name: Lee, Hyeon Jun
name: Ahn, Youngjun
name: Carnis, Jerome
name: Kim, Tae Yeon
name: Unithrattil, Sanjith
name: Lee, Jun Young
name: Chun, Sae Hwan
name: Kim, Sunam
name: Eom, Intae
name: Kim, Minseok
name: Park, Sang-Youn
name: Kim, Kyung Sook
name: Lee, Ho Nyung
name: Jo, Ji Young
name: Evans, Paul G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Above-bandgap femtosecond optical excitation of a ferroelectric/dielectric BaTiO3/CaTiO3 superlattice leads to structural responses that are a consequence of the screening of the strong electrostatic coupling between the component layers. Time-resolved x-ray free-electron laser diffraction shows that the structural response to optical excitation includes a net lattice expansion of the superlattice consistent with depolarization-field screening driven by the photoexcited charge carriers. The depolarization-field-screening-driven expansion is separate from a photoacoustic pulse launched from the bottom electrode on which the superlattice was epitaxially grown. The distribution of diffracted intensity of superlattice x-ray reflections indicates that the depolarization-field-screening-induced strain includes a photoinduced expansion in the ferroelectric BaTiO3 and a contraction in CaTiO3. The magnitude of expansion in BaTiO3 layers is larger than the contraction in CaTiO3. The difference in the magnitude of depolarization-field-screening-driven strain in the BaTiO3 and CaTiO3 components can arise from the contribution of the oxygen octahedral rotation patterns at the BaTiO3/CaTiO3 interfaces to the polarization of CaTiO3. The depolarization-field-screening-driven polarization reduction in the CaTiO3 layers points to a new direction for the manipulation of polarization in the component layers of a strongly coupled ferroelectric/dielectric superlattice.
Agile governance in Information and Communication Technologies: shifting paradigms
Creators: name: Luna, Alexandre J. H. de O.
name: Costa, Cleyverson P.
name: de Moura, Hermano P.
name: Novaes, Magdala A.
name: Nascimento, Cesar A. D. C. do
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computers and Society (cs.CY)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: K.6; K.6.1; K.6.4; D.2; D.2.9

description: This paper presents the basis of the Agile Governance in Information and Communication Technology (ICT), which is based on Agile Software Engineering Methodologies principles and values. Its development was done through a systematic review process, supported by Bibliometrics and Scientometrics methods and techniques, where the Critical Success Factors (CSF) of ICT Governance projects and the principles of the Agile Manifesto were analyzed. Next, through an inductive approach, focused on the convergence between the concepts involved, it was analyzed how agile principles could help to minimize the gap between ICT and business. Evidences of their occurrence were taken through a Conceptual Survey Research. As a result, the foundations and concepts of Agile Governance in ICT were defined and, finally, the development of a reference model was proposed as a future work.
description: Journal of Information Systems and Technology Management (JISTEM), Vol 7, No 2, August 2010
The concept of music in the Shakespearean corpus: an exploration of neoplatonic ideas of music in Shakespeare (1996)
Creators: name: Chrissochoidis, Ilias
Publisher: name: Stanford Digital Repository
Year: 2026
Subjects: subject: Shakespeare, William, 1564-1616
subject: Neoplatonism in literature
subject: English drama--Early modern and Elizabethan
subject: Music imagery
subject: Musicology--Philosophy

description: Part One surveys the major musical concepts of the English Renaissance and their relationship to the Platonic tradition. The main body of the thesis (Part Two) consists of a systematic presentation of Shakespeare’s ideas on music under the Boethian categories of musica mundana, musica humana, and musica instrumentalis. In Part Three, after tracing Shakespeare’s indebtedness to the Platonic tradition, an attempt to synthesize his ideas on music under major Neoplatonic themes is made. The present thesis comes to the conclusion that the wealth, extent, and use of musical allusions in the Shakespearean Corpus allow the definition of Shakespeare’s concept of music as predominantly Neo-Platonic, and centering on the notion of “harmony.” M.Phil. (by research) thesis, University of Liverpool, 1996.
Structure Preserving Discretizations of the Liouville Equation and their Numerical Tests
Creators: name: Levi, Decio
name: Martina, Luigi
name: Winternitz, Pavel
Publisher: name: arXiv
Year: 2015
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The main purpose of this article is to show how symmetry structures in partial differential equations can be preserved in a discrete world and reflected in difference schemes. Three different structure preserving discretizations of the Liouville equation are presented and then used to solve specific boundary value problems. The results are compared with exact solutions satisfying the same boundary conditions. All three discretizations are on four point lattices. One preserves linearizability of the equation, another the infinite-dimensional symmetry group as higher symmetries, the third one preserves the maximal finite-dimensional subgroup of the symmetry group as point symmetries. A 9-point invariant scheme that gives a better approximation of the equation, but significantly worse numerical results for solutions is presented and discussed.
Hopf Categories
Creators: name: Batista, E.
name: Caenepeel, S.
name: Vercruysse, J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 16T05

description: We introduce Hopf categories enriched over braided monoidal categories. The notion is linked to several recently developed notions in Hopf algebra theory, such as Hopf group (co)algebras, weak Hopf algebras and duoidal categories. We generalize the fundamental theorem for Hopf modules and some of its applications to Hopf categories.
description: 47 pages; final version to appear in Algebras and Representation Theory
Culture Communication and Colonial Forest Policy: Van Gujjar Marginalization and Struggle for Forest Rights
Creators: name: Muhammed, Faheem
Publisher: name: figshare
Year: 2020
Subjects: subject: 200202 Asian Cultural Studies
subject: FOS: Other humanities
subject: 160507 Environment Policy
subject: FOS: Political science
subject: 160605 Environmental Politics
subject: Ethnic Studies
subject: 220104 Human Rights and Justice Issues
subject: FOS: Philosophy, ethics and religion
subject: 220407 Studies in Religious Traditions (excl. Eastern, Jewish, Christian and Islamic Traditions)

description: The Indian Forest Governance has been a leftover of the colonial British policies. The colonial forestry instigated the territorialisation of forests to restrict common access and to exclude the traditional forest dwellers and forest-dependent people. Independent India's approach towards the forests made no difference from the colonial policies rather than promoting the Forest Department as the sole manager of the forests. The state, through the intervention of the Forest Department, excluded the traditional forest dwellers from the policy-making processes and then from the forest itself. Van Gujjars, a pastoral, nomadic, Muslim indigenous community in the Uttarakhand and U.P,have been subjected to systematic oppression leading to the eviction and displacement from their traditional forest lands. This research explores the Van Gujjar struggle for forest rights and the oppressive elements in the state forest policy.