cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Supplementary Material for the Paper "Detecting Developers' Task Switches and Types"
Creators: name: Anonymous
Publisher: name: Zenodo
Year: 2019

description: Contains the supplementary material for the paper "Detecting Developers' Task Switches and Types" submitted to ESEC/FSE'19. All contents are explained in the file README.txt.

Abstract:

Developers' work on a broad variety of tasks during their days and constantly switch between tasks. While these task switches can be beneficial, they can also incur a high cognitive burden on developers, since they have to continuously remember and relocate task context - the artifacts and applications relevant to the task. Researchers have therefore proposed to capture task context more explicitly and use this to provide better task support, yet these approaches generally require the developer to manually identify task switches. Automatic approaches for predicting task switches have so far been limited in their accuracy and the time discrepancy between predicted and actual task switches. In our work, we examine the use of automatically tracked computer interaction data to detect developers' task switches as well as task types. In two field studies - a 4h observational study and a multi-day study with experience sampling - we collected data from a total of 25 professional developers. Our study results show that we are able to use temporal and semantic features from developers' computer interaction data to detect task switches and types in the field with high accuracy of 87% and 61% respectively, and within a short time window of less than 1.6 minutes on average from the actual task switch. We discuss our findings and their practical value.

Source Code:

Upon acceptance of the paper, a link to GitHub where the monitoring tool and observation tool used for the field studies can be found will be provided here.
Creato in laboratorio il primo supersolido in 2D
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2021

Usando un gas quantistico ultrafreddo di atomi di disprosio, è stato possibile ottenere per la prima volta un reticolo bidimensionale di “droplet” che possiede sia le proprietà di un solido che quelle di un superfluido. Ne parliamo con la scienziata alla guida del team di fisici sperimentali che ha condotto l’esperimento, Francesca Ferlaino dell’Università di Innsbruck
Oligolepis Brenske 1903
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Oligolepis

description: Oligolepis Brenske, 1903a.
Type species Oligolepis pygidialis Brenske, 1903, by subsequent designation of Lepesme & Paulian (1944).
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 118, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Echi di Calvino tra buchi neri, galassie e big bang
Creators: Claudia Mignone
Publisher: name: Media Inaf
Year: 2021

Attraverso le stravaganti vicissitudini di un eclettico protagonista, il romanzo “Una giornata stellare” di Roberto Bragalone accompagna i lettori tra buchi neri e onde gravitazionali, tra stelle che nascono e galassie che si scontrano in un universo in continua espansione. Scritto con la collaborazione delle ricercatrici Inaf Angela Bongiorno, Marcella Di Criscienzo e Silvia Piranomonte
Asactopholis Brenske 1894
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Asactopholis

description: Asactopholis Brenske, 1894b
[19 species and 1 additional subspecies].
Type species Lepidiota gracilipes Sharp, 1876, by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 118, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Radionuclidi nati sotto il segno dell’Ofiuco
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2021

Utilizzando osservazioni a più lunghezze d’onda – dai millimetri ai raggi gamma – della regione di formazione stellare dell’Ofiuco, gli astronomi hanno rivelato un flusso del radionuclide alluminio-26 da un vicino ammasso stellare. La loro scoperta indica che le supernove nell’ammasso stellare sono la sorgente più probabile dei radionuclidi di vita breve nelle nubi di formazione stellare. Tutti i dettagli su Nature Astronomy
Risoluzione record con le 70mila antenne di LoFar
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2021

Un team internazionale di astronomi, fra i quali ricercatori dell’Inaf e dell’Università di Bologna, ha pubblicato le immagini in banda radio più dettagliate mai viste di lontane galassie, rivelando il loro funzionamento interno con dettagli senza precedenti. Immagini con una risoluzione angolare al di sotto del secondo d’arco, ottenute grazie ai dati raccolti dal Low Frequency Array (LoFar), una rete di oltre 70mila piccole antenne sparse in nove paesi europei
La prima raccolta di Perseverance è andata a vuoto
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2021

Al sol 164, Perseverance ha compiuto il suo primo carotaggio sul Pianeta rosso. Tutto sembrava essere andato per il meglio ma la provetta del campione è risultata essere vuota. Per via della natura della roccia, sembra che il campione si sia polverizzato durante il carotaggio, cosa che non era stata osservata nei test effettuati in laboratorio, commenta Teresa Fornaro dell’Inaf
Introduction to Long-Term Preservation
Creators: name: Markus, Katharina
Publisher: name: Zenodo
Year: 2024
Subjects: digital preservation

description: These slides introducing digital preservation (also called long-term preservation and long-term archiving) were presented in the workshop “Long Term Data Issues: Workshop about Preservation, Archiving and Access in the NFDI” (National Research Data Infrastructure, Nationale Forschungsdateninfrastruktur, NFDI). The workshop was organized by NFDI working group Long Term Archival and Access. The slide deck contains exemplary cases of data loss, defines digital preservation (with references to various digital preservation initatives), introduces the "Object Levels of Preservation" model, relevant metadata standards, preservation policies and certification in the context of digital preservation. The slides are derived from another slide deck (https://doi.org/10.5281/zenodo.13862617).
Hawking Radiation as a Mechanism for Inflation
Creators: name: Modak, Sujoy Kumar
name: Singleton, Douglas
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Friedman-Robertson-Walker (FRW) space-time exhibits particle creation similar to Hawking radiation of a black hole. In this essay we show that this FRW Hawking radiation leads to an effective negative pressure fluid which can drive an inflationary period of exponential expansion in the early Universe. Since the Hawking temperature of the FRW space-time decreases as the Universe expands this mechanism naturally turns off and the inflationary stage transitions to a power law expansion associated with an ordinary radiation dominated Universe.
description: 6 pages. Published version -- Awarded "Honorable Mention" for the 2012 Gravity Research Foundation Essay Contest
Long-Term Preservation and Archiving in NFDI consortia
Creators: name: Arnold, Matthias
name: Goedicke, Michael
name: Holetschek, Jörg
name: Markus, Katharina
name: Svoboda, Nikolai
name: Watson, Juliane
Publisher: name: Zenodo
Year: 2024

description: The slides detail long-term preservation and archiving strategies in various consortia in the National Research Data Infrastructure (Nationale Forschungsdateninfrastruktur, NFDI). They were provided and presented by representatives of the consortia NFDI4Culture, NFDIxCS, NFDI4Biodiversity, NFDI4Microbiota, FAIRAgro and NFDI4Objects in the workshop “Long Term Data Issues: Workshop about Preservation, Archiving and Access in the NFDI”.
Vanishing Theorems for constructible Sheaves on Abelian Varieties
Creators: name: Krämer, Thomas
name: Weissauer, Rainer
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We show that the hypercohomology of most character twists of perverse sheaves on a complex abelian variety vanishes in all non-zero degrees. As a consequence we obtain a vanishing theorem for constructible sheaves and a relative vanishing theorem for a homomorphism between abelian varieties. Our proof relies on a Tannakian description for convolution products of perverse sheaves, and with future applications in mind we discuss the basic properties of the arising Tannaka groups.
Empectida Moser 1914
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Empectida

description: Empectida Moser, 1914a.
Type species Empectida vethi Moser, 1914, by original designation. Synonymy by Prokofiev (2015b).
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 118, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Le tempeste di polvere che inaridiscono Marte
Creators: Claudia Mignone
Publisher: name: Media Inaf
Year: 2021

Favorendo la fuoriuscita di idrogeno dall'atmosfera di Marte, le tempeste di polvere regionali contribuiscono in modo importante alla perdita di acqua da parte del Pianeta rosso: sono i risultati dell'analisi di una tempesta di polvere marziana osservata nel 2019 dalle sonde Mars Reconnaissance Orbiter, Trace Gas Orbiter e Maven. Allo studio ha partecipato anche Giancarlo Bellucci dell'Inaf
Asthenopholis Brenske 1898
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Asthenopholis

description: Asthenopholis Brenske, 1898b
[7 species].
Type species Asthenopholis transvaalensis Brenske, 1898 (= Asthenopholis adspersa (Boheman, 1857)), by subsequent designation of Arrow (1902).
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 118, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Nuovo calcolo di probabilità d’impatto per Bennu
Creators: Stefano Parisini
Publisher: name: Media Inaf
Year: 2021

«Non abbiamo mai modellato la traiettoria di un asteroide con questa precisione prima d'ora», spiega Davide Farnocchia della Nasa, primo autore di un nuovo studio che ha ricalcolato con i dati ottenuti dalla sonda Osiris-Rex le orbite dell’asteroide Bennu per i prossimi due secoli. Fino al 2135 possiamo stare tranquilli; dopo, ha qualche piccola possibilità d’infilare la porta gravitazionale sbagliata
Fluctuation limits of strongly degenerate branching systems
Creators: name: LI, Yuqiang
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F17, 60J80

description: Functional limit theorems for scaled fluctuations of occupation time processes of a sequence of critical branching particle systems in $\R^d$ with anisotropic space motions and strongly degenerated splitting abilities are proved in the cases of critical and intermediate dimensions. The results show that the limit processes are constant measure-valued Wienner processes with degenerated temporal and simple spatial structures.
description: 15 pages
Brachylepis Kolbe 1894
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Brachylepis

description: Brachylepis Kolbe, 1894 (not Brachylepis Karpenko & Gulyaev, 1999)
[3 species].
Type species Coniopholis elephas Gerstaecker, 1867 by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 118, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Adsorption studies using optical reflectometry
Creators: name: Howard, Shaun Christopher
Publisher: name: The Australian National University
Year: 2014

description: The modification of a material's surface properties is critical to many modern industries. The chemical modification of surfaces is usually achieved through the adsorption of surfactant or polymer molecules onto a surface for the purpose of altering rheology, molecular interactions, optical properties, etc. An understanding of the mechanism underpinning the adsorption process has the potential to optimise properties with minimal waste. The work presented in this thesis seeks to uncover additional information about the mechanism of adsorption using a model surfactant cetyl trimethylammonium bromide (CTAB) and a variety of electrolytes to explore some of the nuances involved in the physical-chemical processes. To accomplish this, an Optical Reflecometer (OR) was designed and constructed to improve on resolution of prior instruments, and was used in conjunction with complementary measurement techniques (Quartz Crystal Microbalance, Atomic Force Microscopy) to obtain new insight into the mechanism of adsorption. Isotherms for the adsorption of CTAB onto silica are presented for a family of electrolytes (NaBr, KBr and CsBr) at varying concentrations, allowing for the determination of the common intersection point (CIP) for each system. The CIP represents the point on the isotherm where the dominating driving force in adsorption changes from electrostatic to hydrophobic interactions. In the absence of specific-ion affinities between the solution and the surface, the CIP should be independent of the background electrolyte used. The results of this work indicated that the Cs+ ion shows a preferential affinity for the surface. Time scales of adsorption are explored in great detail for the CTAB + NaBr and CTAB + NaSal systems through the construction of isotherms derived from both OR and QCM studies. These isotherms, along with a series of concentration cycling (ziggurat) experiments elucidate more information regarding the true nature of equilibrium surface excess and identify a range of concentrations over which adsorption is found to occur much slower than previously thought. A mechanism is proposed by which surface bound aggregates grow through monomer addition, not by bulk aggregate collision with the surface. OR is shown to have uses above and beyond simple adsorption, as demonstrated by the successful observation of the swelling-collapse behaviour of a stimulus responsive microgel film. By combining OR data with analogous results obtained from QCM, we are able to infer information regarding the viscoelastic properties of the microgel at various points in its conformational lifecycle. The conclusion is that swelling occurs much more rapidly than collapse, which we attribute to the formation of a dense skin layer on the surface which hinders diffusion of water out of the film.
The gas distribution in the outer regions of galaxy clusters
Creators: name: Eckert, D.
name: Vazza, F.
name: Ettori, S.
name: Molendi, S.
name: Nagai, D.
name: Lau, E. T.
name: Roncarelli, M.
name: Rossetti, M.
name: Snowden, S. L.
name: Gastaldello, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the analysis of a local (z = 0.04 - 0.2) sample of 31 galaxy clusters with the aim of measuring the density of the X-ray emitting gas in cluster outskirts. We compare our results with numerical simulations to set constraints on the azimuthal symmetry and gas clumping in the outer regions of galaxy clusters. We exploit the large field-of-view and low instrumental background of ROSAT/PSPC to trace the density of the intracluster gas out to the virial radius. We perform a stacking of the density profiles to detect a signal beyond r200 and measure the typical density and scatter in cluster outskirts. We also compute the azimuthal scatter of the profiles with respect to the mean value to look for deviations from spherical symmetry. Finally, we compare our average density and scatter profiles with the results of numerical simulations. As opposed to some recent Suzaku results, and confirming previous evidence from ROSAT and Chandra, we observe a steepening of the density profiles beyond \sim r500. Comparing our density profiles with simulations, we find that non-radiative runs predict too steep density profiles, whereas runs including additional physics and/or treating gas clumping are in better agreement with the observed gas distribution. We report for the first time the high-confidence detection of a systematic difference between cool-core and non-cool core clusters beyond \sim 0.3r200, which we explain by a different distribution of the gas in the two classes. Beyond \sim r500, galaxy clusters deviate significantly from spherical symmetry, with only little differences between relaxed and disturbed systems. We find good agreement between the observed and predicted scatter profiles, but only when the 1% densest clumps are filtered out in the simulations. [Abridged]
description: The data for the average profiles and individual clusters can be downloaded at: http://www.isdc.unige.ch/~deckert/newsite/The_Planck_ROSAT_project.html
Political obligation and the civil dead
Creators: name: Lau, Joanne Chung Yan
Publisher: name: The Australian National University
Year: 2012
Subjects: subject: JC329.5.L38 2012
subject: Political obligation Philosophy
subject: Political rights

description: It is commonly held in the current literature on political philosophy that political obligations are binary: subject to certain conditions, either one has an obligation, or one does not. As a result, the literature does not take into account features that may affect the extent to which one might have an obligation - such as whether one is a member of a state - and therefore offers a rather blunt tool for how we can understand our political obligations. In this thesis, I propose a gradated account of political obligations, where political membership, as constituted by the right to vote, is a basis for a more stringent political obligation that exists over and above the general obligation to obey the law held by all people within a state's jurisdiction. I arrive at this position after examining the individual components of my argument: the right to vote, the obligation to obey the law and the relationship between the state and its constituent members. My argument is that those who have the right to vote have a stronger overall obligation to obey the law than the disenfranchised. Such an account is therefore a departure from our ordinary understanding of political obligations as being binary, but it provides an account of understanding political obligations in a way that more accurately reflects the different relations in which different people stand to the state.
Using LiDAR to detect in-stream woods : a scaled approach
Creators: name: Abalharth, Mahdi Hadi
Publisher: name: University of British Columbia
Year: 2013

description: In-stream woods significantly influence watershed hydrology, flow regime, channel morphology and stability, and processes in streams. Consequently, in-stream woods play a major role in the existence and conservation of riparian and aquatic ecosystems. In this thesis, I attempt to detect and quantify LWD in stream channels using a remote sensing method, LiDAR, in conjunction with the traditional fieldwork. To the best of my knowledge, LiDAR-based analysis has not been used to study woods in stream channels. I, initially, attempted to re-apply advanced medical image processing and segmentation techniques on the LiDAR intensity images in order to confine the LiDAR terrain-based analysis to the stream channel networks, optimizing time and computing resources. The results exhibited significant image enhancement and accurate segmentation in certain regions; however, an automatic and a unified framework to delineate the stream channel networks, across different scales and spatial locations, is still required. LiDAR-based analysis demonstrated a more comprehensive solution for detecting in-stream woods in relation to the fieldwork through a high rate of commission and a low rate of omission. The filtered approach predicted the presence of 95% of fieldwork-reported in-stream woods, highlighting a 5% rate of omission, but with 25% rate of commission indicated by the identification of at least 15 new LWD locations that were not initially reported by the field crew. The non-filtered approach identified 87% of field-reported LWD, highlighting a 13% rate of omission and, similar to the filtered approach, a %25 rate of commission. Overall, the non-filtered and the filtered LiDAR showed fairly accurate predictions for in-stream woods’ dimensional measurements (length, width, and height) with respect to the field data. However, the filtered approach showed better dimension estimation of in-stream woods compared to the unfiltered LiDAR. Although a margin of error existed for fieldwork and LiDAR methods, a careful examination of orthophotos showed that LiDAR results were more accurate than the Laser Range Finder (LRF) used in the field.
Byrsalepis Brenske 1898
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Byrsalepis

description: Byrsalepis Brenske, 1898b
[3 species].
Type species Byrsalepis mikindana Brenske, 1898, by subsequent designation of Lucas (1920).
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 118, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
A City for Music Lovers: Creating a classical music culture in Sydney 1889-1939
Creators: name: Fraser, Fiona
Publisher: name: The Australian National University
Year: 2018
Subjects: Classical music
ABC
composers
Musicians' Union
entertainment entrepreneurs
Australian music
Sydney Symphony Orchestra
concerts
NSW State Conservatorium
Henri Verbrugghen
NSW Musical Association

description: Through the efforts of thousands of dedicated men and women classical music obtained a privileged position in Sydney in the early twentieth century. This neglected area of Australia’s cultural history was part of a transnational phenomenon which has divided historians and musicologists. Does it demonstrate the imposition of elite culture from above or did it emerge from the combined energies of those who believed that classical music might provide genuine benefits for the whole community? Contributing to a body of literature on the social history of classical music in Europe and the United States, this thesis incorporates a Bourdieuian analysis examining the creation of classical music in Sydney from the perspective of key stakeholders: entertainment entrepreneurs, musical institutions, performers, composers and audience. It focuses on the interaction between these stakeholders to consider the field of classical music as a dynamic, constantly evolving arena of interaction where the personal and political intersect. It takes into account social, economic, political and technological developments as Australia established itself as an independent nation grappling with a rapidly expanding population, modernity and the rise of a politically engaged working class. Such an approach brings into question previous accounts of the development on classical music in Australia which have focused on the role of the government owned Australian Broadcasting Commission (ABC) rather than the efforts of multiple stakeholders, community groups and committed individuals. It provides a new perspective that demonstrates the complex and iterative nature of social change and suggests ways in which our musical choices have come to define who we are.
Chi riesce a trovare Perseverance?
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2021

Il piccolo elicottero marziano della Nasa ha recentemente completato il suo undicesimo volo sul Pianeta rosso, scattando moltissime fotografie durante il suo viaggio. Oltre a catturare massi, dune di sabbia e gli affioramenti rocciosi prevalenti nella regione South Séítah nel cratere Jezero, alcune delle immagini di Ingenuity hanno ripreso il rover Perseverance durante la sua prima campagna scientifica
Bagliori tremolanti svelano la massa del buco nero
Creators: Ilaria Barricella
Publisher: name: Media Inaf
Year: 2021

Il processo di alimentazione di un buco nero causa uno sfarfallio di luce nel disco di accrescimento. Un team internazionale di astronomi, coordinato da Colin Burke dell’Università dell’Illinois Urbana-Champaign, ha trovato una correlazione tra la fluttuazione di luminosità e la massa dei buchi neri supermassicci. Non solo: questa correlazione si può estendere anche alle nane bianche e potenzialmente ad altri oggetti astronomici
Dragonfly, una libellula su Titano
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2021

Sono stati recentemente pubblicati su “The Planetary Science Journal” gli obiettivi scientifici della missione Dragonfly della Nasa, dedicata all’esplorazione di Titano, la grande luna di Saturno. Il rotorcraft lander farà indagini sulla chimica prebiotica della luna, sulla sua abitabilità e sui potenziali biomarcatori chimici derivanti da eventuali forme di vita, passate o presenti
Camerunopholis Lacroix 2002
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Camerunopholis

description: Camerunopholis Lacroix, 2002
[2 species].
Type species Camerunopholis mirifica Lacroix, 2002 (= Camerunopholis kameruna (Moser, 1913)), by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 118, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
A Coordinated Approach to Channel Estimation in Large-scale Multiple-antenna Systems
Creators: name: Yin, Haifan
name: Gesbert, David
name: Filippou, Miltiades
name: Liu, Yingzhuang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper addresses the problem of channel estimation in multi-cell interference-limited cellular networks. We consider systems employing multiple antennas and are interested in both the finite and large-scale antenna number regimes (so-called "massive MIMO"). Such systems deal with the multi-cell interference by way of per-cell beamforming applied at each base station. Channel estimation in such networks, which is known to be hampered by the pilot contamination effect, constitute a major bottleneck for overall performance. We present a novel approach which tackles this problem by enabling a low-rate coordination between cells during the channel estimation phase itself. The coordination makes use of the additional second-order statistical information about the user channels, which are shown to offer a powerful way of discriminating across interfering users with even strongly correlated pilot sequences. Importantly, we demonstrate analytically that in the large-number-of-antennas regime, the pilot contamination effect is made to vanish completely under certain conditions on the channel covariance. Gains over the conventional channel estimation framework are confirmed by our simulations for even small antenna array sizes.
description: 10 pages, 6 figures, to appear in IEEE Journal on Selected Areas in Communications
Chaetocosmetes Moser 1917
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Chaetocosmetes

description: Chaetocosmetes Moser, 1917
[11 species].
Type species Chaetocosmetes javanus Moser, 1917, by subsequent designation of Matsumoto (2015).
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 118, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Un premio per l’elicottero marziano Ingenuity
Creators: Stefano Parisini
Publisher: name: Media Inaf
Year: 2021

Qualcuno li considera i premi Oscar per l’aerospazio, quelli assegnati annualmente dall’Aviation Week Network statunitense. Di certo non si tratta di fiction, né di tecnologia campata in aria: nella categoria “Spazio” ha trionfato - fra gli altri – il primo velivolo a spiccare il volo dal suolo di Marte. Che nel frattempo…
Cochliotis Kolbe 1894
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Cochliotis

description: Cochliotis Kolbe, 1894
[3 species].
Type species Coniopholis melolonthoides Gerstaecker, 1867, by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 118, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Quantum Hall effect in narrow graphene ribbons
Creators: name: Hettmansperger, H.
name: Duerr, F.
name: Oostinga, J. B.
name: Gould, C.
name: Trauzettel, B.
name: Molenkamp, L. W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The edge states in the integer quantum Hall effect are known to be significantly affected by electrostatic interactions leading to the formation of compressible and incompressible strips at the boundaries of Hall bars. We show here, in a combined experimental and theoretical analysis, that this does not hold for the quantum Hall effect in narrow graphene ribbons. In our graphene Hall bar, which is only 60 nm wide, we observe the quantum Hall effect up to Landau level index k=2 and show within a zero free-parameter model that the spatial extent of the compressible and incompressible strips is of a similar magnitude as the magnetic length. We conclude that in narrow graphene ribbons the single-particle picture is a more appropriate description of the quantum Hall effect and that electrostatic effects are of minor importance.
description: RevTex, 5 pages, 4 figures (matches published version)
Trovate evidenze di vulcanismo recente su Venere
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2021

Utilizzando nuove tecniche di analisi dati, due ricercatrici del Planetary Science Institute hanno trovato le prove di vulcanismo recente nei vecchi dati della sonda Magellano della Nasa, nei pressi della Aramaiti Corona, una struttura geologica della superficie di Venere. Tutti i dettagli su Geophysical Research Planets
Metamaterial-based polarization control plate for producing incoherent laser irradiation
Creators: name: Ling, Xiaohui
name: Luo, Hailu
name: Zhao, Chujun
name: Wen, Shuangchun
name: Fan, Dianyuan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a metamaterial-based random polarization control plate to produce incoherent laser irradiation by exploiting the ability of metamaterial in local polarization manipulation of beam upon transmission via tuning its local geometry. As a proof-of-principle, we exemplify this idea numerically in a simple optical system using a typical L-shaped plasmonic metamaterial with locally varying geometry, from which the desired polarization distribution can be obtained. The calculating results illustrate that this scheme can effectively suppress the speckle contrast and increase irradiation uniformity, which has potential to satisfy the increasing requirements for incoherent laser irradiation.
description: 5 pages, 6 figures
Alla conquista dello spazio interplanetario e oltre
Creators: Laura Leonardi
Publisher: name: Media Inaf
Year: 2021

Dalla prima corsa alla Luna alla ricerca della prossima Terra, il libro “In viaggio tra asteroidi e comete”, scritto da Antonio Piazzolla insieme a Giordano Cevolani, parla del viaggio straordinario compiuto dall'umanità alla conquista dello spazio interplanetario. Abbiamo intervistato uno degli autori, Antonio Piazzolla
Mappa termica dell’asteroide metallico 16 Psyche
Creators: Eleonora Ferroni
Publisher: name: Media Inaf
Year: 2021

Sfruttando la potenza delle antenne Alma in Cile e la tecnica dell'interferometria è stata prodotta la prima immagine della temperatura di 16 Psyche a una risoluzione di 30 km/pixel – la più alta mai ottenuta da terra per immagini della temperatura di un asteroide. Ne parliamo con Saverio Cambioni, uno dei tre autori dello studio che riporta il risultato su Planetary Science Journal
Sul fondo del cratere Gale solo qualche stagno
Creators: Stefano Parisini
Publisher: name: Media Inaf
Year: 2021

Analizzando i dati del rover Curiosity della Nasa, un nuovo studio di geologi dell’Università di Hong Kong mette in dubbio che le rocce sedimentarie sulle quali è concentrata l’attività del laboratorio semovente si siano formate a partire da depositi lacustri. Si tratterebbe, perlopiù, di sabbia e limo precipitati dall'atmosfera e rielaborati dal vento
Numerical analysis of robot dynamics algorithms
Creators: name: Li, Mingxu
Publisher: name: The Australian National University
Year: 2012
Subjects: subject: Robots Dynamics
subject: Robots Motion Mathematical models.
subject: Algorithms
subject: Dynamics, Rigid

description: This thesis presents two issues related to robot dynamics algorithms. We first discuss the planar robot dynamics algorithms because it is useful to study robot motion in the plane before generalizing to 3D. The planar versions of the three most commonly used dynamics algorithms, the recursive Newton-Euler algorithm (RNEA), the articulated-body algorithm (ABA)) and the composite rigid-body algorithm (CRBA) are obtained by using planar vectors, tensors and coordinate transforms. It is shown that the planar algorithms are asymptotically between 4 and 4.8 times faster than their comparable spatial counterparts. Moreover, the numerical accuracy of robot dynamics algorithms need to be equally considered. Investigations into the numerical accuracy of the RNEA, the ABA, the CRBA, the constraint force algorithm (CFA), the divide-and-conquer algorithm (DCA) and pivoted divide-and-conquer algorithm (DCAp) are explored. It is shown by the empirical study that the three parallel algorithms, the CFA, the DCA, and the DCAp, are significantly less accurate than the two serial algorithms, the ABA and CRBA. However, the performances of the planar versions of dynamics algorithms are different, and the accuracy of the parallel algorithms is comparable with the serial ones. In addition, we use the CESTAC (Controle et Estimation Stochastique des Arrondic de Calculs) and the affine arithmetic (AA) to estimate the propagation of round-off errors in robot dynamics algorithms. The accomplishments provided in this thesis represent better understanding of the performances of the existing robot dynamics algorithms.
Afrodite e la cometa
Creators: Albino Carbognani
Publisher: name: Media Inaf
Year: 2021

Il 19 dicembre 2021 il pianeta Venere passerà a circa 50mila km dall'orbita della cometa Leonard (C/2021 A1), nella regione dove dovrebbero essere presenti meteoroidi di dimensioni superiori al millimetro. Questo potrebbe provocare una tempesta di meteore nell'atmosfera del pianeta che – se osservata – aiuterebbe gli astronomi a determinare l'attività del nucleo della cometa quando era a grandi distanze dal Sole, oltre le 30 unità astronomiche
Cyphochilus Waterhouse 1867
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Cyphochilus

description: Cyphochilus Waterhouse, 1867
[62 species and 2 additional subspecies].
Type species Melolontha candida Olivier, 1789, by subsequent designation of Lucas (1920).
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 118, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Systematic X-ray Analysis of Radio Relic Clusters with SUZAKU
Creators: name: Akamatsu, Hiroki
name: Kawahara, Hajime
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We perform a systematic X-ray analysis of six giant radio relics in four clusters of galaxies using the Suzaku satellite. The sample includes CIZA 2242.8-5301, Zwcl 2341.1-0000, the South-East part of Abell 3667 and previously published results of the North-West part of Abell 3667 and Abell 3376. Especially we first observed the narrow (50 kpc) relic of CIZA 2242.8-5301 by Suzaku satellite, which enable us to reduce the projection effect. We report X-ray detections of shocks at the position of the relics in CIZA2242.8-5301 and Abell 3667 SE. At the position of the two relics in ZWCL2341.1-0000, we do not detect shocks. From the spectroscopic temperature profiles across the relic, we find that the temperature profiles exhibit significant jumps across the relics for CIZA 2242.8-5301, Abell 3376, Abell 3667NW, and Abell 3667SE. We estimated the Mach number from the X-ray temperature or pressure profile using the Rankine-Hugoniot jump condition and compared it with the Mach number derived from the radio spectral index. The resulting Mach numbers (M=1.5-3) are almost consistent with each other, while the Mach number of CIZA2242 derived from the X-ray data tends to be lower than that of the radio observation. These results indicate that the giant radio relics in merging clusters are related to the shock structure, as suggested by previous studies of individual clusters.
description: Accepted for publication in PASJ
Semiassociative relation alegbras and inverse property loops
Creators: name: Ali, Asif
Publisher: name: The Australian National University
Year: 2013
Subjects: subject: Relation algebras
subject: Groupoids
subject: Loops (Group theory)
subject: Inverse relationships (Mathematics)

description: Semiassociative relation algebras are among the three varieties of algebras introduced by Maddux (R. Maddux, Some varieties containing relation algebras, Trans. of Amer. Math. Soc., 272, 501-526, 1982.) and are obtained by replacing the associative law (among the conditions of a relation algebra) by a weaker law known as semiassociative law. This thesis mainly investigates the classes of groupoids and multigroupoids whose complex algebras are semiassociative relation algebras and vice versa. We managed to prove that the complex algebra of a groupoid is a semiassociative relation algebra if and only if the groupoid is an inverse property loop (IP loop). We also proved that the complex algebra of a multigroupoid is a semiassociative algebra if and only if the multigroupoid is a polyloop. These results generated enoughinterest in finding the library of small IP loops and hence we obtained the numbers of non-isomorphic IP loops having order up to 13. Since these were obtained by exhaustive enumeration, they are available for inspection. We have also included in this thesis the classification of IP loops into some important subclasses; we established that the smallest non-abelian IP loop with square property is of order 12 and there are 3 of order 12 and only 2 of order 13; the smallest non-associative IP loop that is both flexible and alternative is of order 12 and there are only 2 of order 12 but none of order 13. We also confirmed that the smallest non-associative Steiner loop is of order 10 and that the smallest non-Steiner non-associative C-loop is of order 12. We also listed the non-associative IP loops having Lagrange property and the smallest Hamiltonian non-associative IP loops. It is surprising to note that there are only 25 non-associative abelian IP loops among more than 12,000 small IP loops. It is well known that the IP loops of exponent 2 are exactly the Steiner loops. In this thesis we also managed to count the IP loops of exponent 3 and exponent 5; there are only 66 non-associative IP loops of exponent 3 (64 are of order 13) and only 10 of exponent 5 (all of order 13).
158mila giganti rosse oscillanti per Tess
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2021

Grazie ai dati del satellite Tess della Nasa e a un nuovo metodo basato sull’apprendimento automatico, alcuni astronomi dell’Università delle Hawaii hanno individuato oltre 158mila giganti rosse oscillanti, su tutto il cielo, di cui hanno poi calcolato massa e distanza. Queste stelle, i cui ritmi di pulsazione derivano da onde sonore interne, rappresentano i primi accordi dell’esplorazione sinfonica della nostra galassia. Tutti dettagli su ApJ
Type-1.5 superconductivity in multiband systems: magnetic response, broken symmetries and microscopic theory. A brief overview
Creators: name: Babaev, E.
name: Carlstrom, J.
name: Garaud, J.
name: Silaev, M.
name: Speight, J. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A conventional superconductor is described by a single complex order parameter field which has two fundamental length scales, the magnetic field penetration depth λand the coherence length ξ. Their ratio κdetermines the response of a superconductor to an external field, sorting them into two categories as follows; type-I when κ<1/\sqrt{2} and type-II when κ>1/\sqrt{2} . We overview here multicomponent systems which can possess three or more fundamental length scales and allow a separate "type-1.5" superconducting state when, e.g. in two-component case ξ_1
description: Prepared for the proceedings of "Vortex VII" conference. Animations of vortices in type-1.5 superconductors is available at http://people.umass.edu/garaud/NonPairwise.html. http://www.youtube.com/user/QuantumVortices v2.: Minor additions (published version)
Gravitational Fragmentation in Galaxy Mergers: A Stability Criteria
Creators: name: Escala, Andres
name: Becerra, Fernando
name: del Valle, Luciano
name: Castillo, Esteban
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the gravitational stability of gaseous streams in the complex environment of a galaxy merger, because mergers are known to be places of ongoing massive cluster formation and bursts of star formation. We find an analytic stability parameter for case of gaseous streams orbiting around the merger remnant. We test our stability criteria using hydrodynamical simulations of galaxy mergers, obtaining satisfactory results. We find that our criteria successfully predicts the streams that will be gravitationally unstable to fragment into clumps.
description: 10 pages, 2 figures. After 2nd referee report
Verso un sensore quantistico per materia oscura
Creators: Stefano Parisini
Publisher: name: Media Inaf
Year: 2021

Far marciare all’unisono in modo quantistico 150 atomi di berillio non è facile. Ma il microscopico sensore blu che ne deriva – secondo uno studio guidato dal Nist statunitense e recentemente pubblicato su Science – potrebbe agire da membrana per rivelare gli echi elettromagnetici di un certo tipo di materia oscura
Randomized Benchmarking of Multi-Qubit Gates
Creators: name: Gaebler, J. P.
name: Meier, A. M.
name: Tan, T. R.
name: Bowler, R.
name: Lin, Y.
name: Hanneke, D.
name: Jost, J. D.
name: Home, J. P.
name: Knill, E.
name: Leibfried, D.
name: Wineland, D. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: As experimental platforms for quantum information processing continue to mature, characterization of the quality of unitary gates that can be applied to their quantum bits (qubits) becomes essential. Eventually, the quality must be sufficiently high to support arbitrarily long quantum computations. Randomized benchmarking already provides a platform-independent method for assessing the quality of one-qubit rotations. Here we describe an extension of this method to multi-qubit gates. We provide a platform-independent protocol for evaluating the performance of experimental Clifford unitaries, which form the basis of fault-tolerant quantum computing. We implemented the benchmarking protocol with trapped-ion two-qubit phase gates and one-qubit gates and found an error per random two-qubit Clifford unitary of $0.162 \pm 0.008$, thus setting the first benchmark for such unitaries. By implementing a second set of sequences with an extra two-qubit phase gate at each step, we extracted an error per phase gate of $0.069 \pm 0.017$. We conducted these experiments with movable, sympathetically cooled ions in a multi-zone Paul trap - a system that can in principle be scaled to larger numbers of ions.
description: Corrected description of parallel single-qubit benchmark experiment. Results unchanged