cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Structure and binding in crystals of cage-like molecules: hexamine and platonic hydrocarbons
Creators: name: Berland, Kristian
name: Hyldgaard, Per
Publisher: name: arXiv
Year: 2010
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this paper, we show that first-principle calculations using a van der Waals density functional (vdW-DF), [Phys. Rev. Lett. $\mathbf{92}$, 246401 (2004)] permits determination of molecular crystal structure. We study the crystal structures of hexamine and the platonic hydrocarbons (cubane and dodecahedrane). The calculated lattice parameters and cohesion energy agree well with experiments. Further, we examine the asymptotic accounts of the van der Waals forces by comparing full vdW-DF with asymptotic atom-based pair potentials extracted from vdW-DF. The character of the binding differ in the two cases, with vdW-DF giving a significant enhancement at intermediate and relevant binding separations. We analyze consequences of this result for methods such as DFT-D, and question DFT-D's transferability over the full range of separations.
"Io vorrei fare delle verifiche diverse e non, come sempre, su scheda o scritte!": far sperimentare varie modalità di restituzione degli apprendimenti per favorire la motivazione rispetto ai momenti di valutazione
Creators: name: Cardarelli, Talita
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2022
Subjects: motivazione
restituzione degli apprendimenti
Universal Design for Learning
personalizzazione degli apprendimenti

description: Si parla spesso di motivazione ad apprendere, ed è ormai chiaro quanto quest’ultima sia fondamentale a scuola. Si cerca di proporre delle lezioni stimolanti e di diversificare le proposte per rendere i contenuti accessibili a tutti gli allievi. Poi, però, spesso gli studenti sono chiamati a restituire gli apprendimenti attraverso delle verifiche su scheda che, oltre ad essere poco motivanti per alcuni di loro, favoriscono solo una parte della classe. L’obiettivo del mio lavoro di tesi è quello di indagare, in maniera applicativa ed esplorativa, in che modo far sperimentare agli allievi diverse modalità di restituzione degli apprendimenti influisce sulla loro motivazione nello svolgere momenti di verifica. Questo progetto è stato proposto in una quinta elementare di diciassette allievi, all’interno della quale vi sono degli studenti con profili di apprendimento specifici. Attraverso una raccolta dati iniziale e finale sono state rilevate le sensazioni suscitate da questi momenti, in quanto indici di motivazione. Per raccogliere i dati sono stati utilizzati principalmente i questionari e il diario di bordo, strumenti grazie ai quali è stato possibile rilevare un incremento, in fase finale, delle sensazioni positive legate ai momenti di restituzione degli apprendimenti. Sembrerebbe, quindi, che variando le tipologie di verifica gli allievi siano più motivati a svolgerle; rimane, però centrale il ruolo della riuscita. Relatore: Nicola Rudelli.
title: ÐÐ±Ð½Ð°ÑÑÐ¶ÐµÐ½Ð¸Ðµ Ð°Ð½Ð¾Ð¼Ð°Ð»Ð¸Ð¹ ÑÐµÑÐµÐ²Ð¾Ð³Ð¾ ÑÑÐ°ÑÐ¸ÐºÐ° Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ Ð°Ð²ÑÐ¾ÐºÐ¾Ð´Ð¸ÑÐ¾Ð²ÑÐ¸ÐºÐ¾Ð²
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸ÑÑÐ°
titleType: Subtitle
title: Network traffic anomaly detection using autoencoders
Creators: name: Ð¡ÐºÐ°ÐºÐ°Ð»ÑÑÐºÐ°Ñ, ÐÐ°ÑÐ°Ð»Ð¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÐµ ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¸
Ð½ÐµÐ¹ÑÐ¾Ð½Ð½ÑÐµ ÑÐµÑÐ¸
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ÑÐ¸ÑÑÐµÐ¼Ð° Ð¾Ð±Ð½Ð°ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð²ÑÐ¾ÑÐ¶ÐµÐ½Ð¸Ð¹
ÑÐµÑÐµÐ²ÑÐµ Ð°ÑÐ°ÐºÐ¸
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Ð³Ð»ÑÐ±Ð¾ÐºÐ¾Ðµ Ð¾Ð±ÑÑÐµÐ½Ð¸Ðµ
information technology
neural networks
autoencoder
intrusion detection system
network attacks
anomaly detection
deep learning

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½ Ð¿Ð¾Ð´ÑÐ¾Ð´ Ðº Ð¾Ð±Ð½Ð°ÑÑÐ¶ÐµÐ½Ð¸Ñ ÑÐµÑÐµÐ²ÑÑ Ð°Ð½Ð¾Ð¼Ð°Ð»Ð¸Ð¹ Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ Ð°Ð²ÑÐ¾ÐºÐ¾Ð´Ð¸ÑÐ¾Ð²ÑÐ¸ÐºÐ¾Ð². Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð°ÑÑÐ¸ÑÐµÐºÑÑÑÑ ÐºÐ»Ð°ÑÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð½ÐµÐ¹ÑÐ¾Ð½Ð½ÑÑ ÑÐµÑÐµÐ¹ Ð¸ Ð½ÐµÐ¹ÑÐ¾Ð½Ð½ÑÑ ÑÐµÑÐµÐ¹ Ð³Ð»ÑÐ±Ð¾ÐºÐ¾Ð³Ð¾ Ð¾Ð±ÑÑÐµÐ½Ð¸Ñ. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· Ð°ÑÑÐ¸-ÑÐµÐºÑÑÑÑ Ð°Ð²ÑÐ¾ÐºÐ¾Ð´Ð¸ÑÐ¾Ð²ÑÐ¸ÐºÐ°. ÐÐ¾ÑÑÑÐ¾ÐµÐ½Ñ Ð¼Ð¾Ð´ÐµÐ»Ð¸ Ð°Ð²ÑÐ¾ÐºÐ¾Ð´Ð¸ÑÐ¾Ð²ÑÐ¸ÐºÐ¾Ð². Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½ Ð¸ ÑÐµÐ°Ð»Ð¸Ð·Ð¾Ð²Ð°Ð½ Ð¿ÑÐ¾ÑÐ¾ÑÐ¸Ð¿ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½Ð¾Ð³Ð¾ ÐºÐ¾Ð¼Ð¿Ð»ÐµÐºÑÐ° Ð´Ð»Ñ Ð¾Ð±Ð½Ð°ÑÑÐ¶ÐµÐ½Ð¸Ñ Ð°Ð½Ð¾Ð¼Ð°Ð»Ð¸Ð¹ Ð² ÑÐµ-ÑÐµÐ²Ð¾Ð¼ ÑÑÐ°ÑÐ¸ÐºÐµ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¿Ð¾ÑÑÑÐ¾ÐµÐ½Ð½ÑÑ Ð¼Ð¾Ð´ÐµÐ»ÐµÐ¹.
description: This paper presents an approach to detecting network anomalies using autoen-coders. It provides an overview of the features of classical artificial neural networks and deep learning neural networks. The analysis of autoencoder architecture has been made and models of autoencoder have been built. A prototype of a software package for detecting network anomalies based on the constructed models was developed and implemented.
The formation of ultra-compact dwarf galaxies and their black holes in a cosmological simulation
Creators: name: Mayes, Rebecca
name: None
Publisher: name: Zenodo
Year: 2019

description: Ultra-compact dwarf galaxies (UCDs) are intermediate objects between star clusters and galaxies. One theory of UCD formation is that they are the stripped nuclei of dwarf galaxies that were tidally disrupted by mergers with other galaxies. Recent observations have detected supermassive black holes in a few massive UCDs, supporting this formation hypothesis. However previous numerical simulations of the process have not had the resolution to model the presence of UCDs or their black holes. We have used the state-of-the-art EAGLE simulation to model the formation of UCDs. We have done this by tracking the most bound particles of galaxies that are stripped in the simulation, which we then identify as UCDs. The EAGLE simulation allows us to determine the size of the black hole that was in the progenitor galaxy and now resides in the surviving UCD. We compared the radial distributions and masses of the simulated stripped nuclei to observed UCD populations and found them to be consistent, suggesting that UCDs likely are stripped nuclei. Our next step will be to determine the black hole masses of the simulated stripped nuclei and compare them with the black holes observed in UCDs. This will allow us to make a more accurate comparison of the black hole populations predicted by the EAGLE simulation with observed black hole populations.
Scalable methods for improving genome assemblies
Creators: name: Nikolić, Vladimir
Publisher: name: University of British Columbia
Year: 2021

description: De novo genome assembly is cornerstone to modern genomics studies. It is also a useful method for studying genomes with high variation, such as cancer genomes, as it is not biased by a reference. De novo short-read assemblers commonly use de Bruijn graphs, where nodes are sequences of equal length k, also known as k-mers. Edges in this graph are established between nodes that overlap by k - 1 bases, followed by merging nodes along unambiguous walks in the graph. The selection of k is influenced by a few factors, and its fine tuning results in a trade-off between graph connectivity and sequence contiguity. Ideally, multiple k sizes should be used, so lower values can provide good connectivity in lesser covered regions and higher values can increase contiguity in well-covered regions. However, this approach has only been explored with small genomes, without addressing scalability issues with larger ones. Here we present RResolver, a scalable algorithm that takes a short-read de Bruijn graph assembly with a starting k as input and uses a k value closer to that of the read length to resolve repeats. RResolver builds a Bloom filter of sequencing reads which it uses to evaluate the assembly graph path support at branching points and removes the paths with insufficient support. RResolver runs efficiently, taking 3% of a typical ABySS human assembly pipeline run time on average with 48 threads and 40GB memory. Compared to a baseline assembly, RResolver improves scaffold contiguity (NGA50) by up to 16% and reduces misassemblies by up to 7%. RResolver adds a missing component to scalable de Bruijn graph genome assembly. By improving the initial and fundamental graph traversal outcome, all downstream ABySS algorithms greatly benefit by working with a more accurate and less complex representation of the genome.
Lie and Noether symmetries of geodesic equations and collineations
Creators: name: Tsamparlis, Michael
name: Paliathanasis, Andronikos
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Lie symmetries of the geodesic equations in a Riemannian space are computed in terms of the special projective group and its degenerates (affine vectors, homothetic vector and Killing vectors) of the metric. The Noether symmetries of the same equations are given in terms of the homothetic and the Killing vectors of the metric. It is shown that the geodesic equations in a Riemannian space admit three linear first integrals and two quadratic first integrals. We apply the results in the case of Einstein spaces, the Schwarzschild spacetime and the Friedman Robertson Walker spacetime. In each case the Lie and the Noether symmetries are computed explicitly together with the corresponding linear and quadratic first integrals.
description: 19 pages
SI Appendix from Density-dependent effects on reproductive output in a capital breeding carnivore, the northern elephant seal (Mirounga angustirostris)
Creators: name: Holser, Rachel R.
name: Crocker, Daniel E.
name: Robinson, Patrick W.
name: Condit, Richard
name: Costa, Daniel P.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: All organisms face resource limitations that will ultimately restrict population growth, but the controlling mechanisms vary across ecosystems, taxa, and reproductive strategies. Using four decades of data, we examine how variation in the environment and population density affect reproductive outcomes in a capital-breeding carnivore, the northern elephant seal (Mirounga angustirostris). This species provides a unique opportunity to examine the relative importance of resource acquisition and density-dependence on breeding success. Capital breeders accrue resources over large temporal and spatial scales for use during an abbreviated reproductive period. This strategy may have evolved, in part, to confer resilience to short-term environmental variability. We observed density-dependent effects on weaning mass, and maternal age (experience) was more important than oceanographic conditions or maternal mass in determining offspring weaning mass. Together these findings show that the mechanisms controlling reproductive output are conserved across terrestrial and marine systems and vary with population dynamics, an important consideration when assessing the effect of extrinsic changes, such as climate change, on a population.
Multiomics dissection of Chikungunya virus pathogenesis reveals Neuropilin 2 as a novel therapeutic target
Creators: name: ADNAN, NUR AMELIA AZREEN
Publisher: name: Monash University
Year: 2023
Subjects: Infectious diseases
Virology

description: Chikungunya virus (CHIKV) can infect humans via Aedes mosquito bites and causes joint pain, fever, rashes and sometimes death in immunocompromised patients. Currently, there are no approved antivirals or vaccines for CHIKV. This thesis covers the pathogenesis of CHIKV in human muscle cells as well as the road to unveil the therapeutics target that can be used to reduce the CHIKV infection severity.
Modulation instability induced by periodic power variation in soliton fiber ring lasers
Creators: name: Luo, Zhi-Chao
name: Xu, Wen-Cheng
name: Song, Chuang-Xing
name: Luo, Ai-Ping
name: Chen, Wei-Cheng
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Modulation instability with subsideband generation induced by periodic power variation in soliton fiber ring lasers is reported. We found that different wavelength shifts of subsideband generation are related to different periodic power variation. The period of power variation and wavelength shifts of subsideband can be changed by altering the linear cavity phase delay. It is also found that the periodic power variation is caused by the interaction between the nonuniform polarization state of the circulating light and the polarizer in the laser cavity.
description: 16 pages, 6 figures
A nonpolynomial Schroedinger equation for resonantly absorbing gratings
Creators: name: Shabtay, Lior
name: Malomed, Boris A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We derive a nonlinear Schroedinger equation with a radical term, in the form of the square root of (1-|V|^2), as an asymptotic model of the optical medium built as a periodic set of thin layers of two-level atoms, resonantly interacting with the electromagnetic field and inducing the Bragg reflection. A family of bright solitons is found, which splits into stable and unstable parts, exactly obeying the Vakhitov-Kolokolov criterion. The soliton with the largest amplitude, which is |V| = 1, is found in an explicit analytical form. It is a "quasi-peakon", with a discontinuity of the third derivative at the center. Families of exact cnoidal waves, built as periodic chains of quasi-peakons, are found too. The ultimate solution belonging to the family of dark solitons, with the background level |V| = 1, is a dark compacton, also obtained in an explicit analytical form. Those bright solitons which are unstable destroy themselves (if perturbed) attaining the critical amplitude, |V| = 1. The dynamics of the wave field around this critical point is studied analytically, revealing a switch of the system into an unstable phase. Collisions between bright solitons are investigated too. The collisions between fast solitons are quasi-elastic, while slowly moving ones merge into breathers, which may persist or perish (in the latter case, also by attaining |V| = 1).
description: Physical Review A, in press
Ampliamento stabile industriale Schindler, Locarno
Creators: name: Carnemolla, Chiara
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2015

description: La ditta Schindler rinomata per i suoi macchinari elettronici, tra cui scale mobili e ascensori, possiede una sede a Locarno, comune ticinese che si affaccia sul Lago Maggiore. Qui vengono realizzate le schede elettroniche, costituenti il cuore della funzionalità degli ascensori, infatti permettono di effettuare diverse manovre. Per questo motivo la richiesta della committenza non comprendeva soltanto una zona dedicata alla produzione, divisa su tre piani il cui piano terra alto quasi 10m è riservato al magazzino, ma anche una torre di 6 piani e con diversi vani ascensori appositi per il test delle manovre degli ascensori.
A Model of the Spectral Evolution of Pulsar Wind Nebulae
Creators: name: Tanaka, Shuta J.
name: Takahara, Fumio
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the spectral evolution of PWNe taking into account the energy injected when they are young. We model the evolution of the magnetic field inside a uniformly expanding PWN. Considering time dependent injection from the pulsar and coolings by radiative and adiabatic losses, we solve the evolution of the particle distribution function. The model is calibrated by fitting the calculated spectrum to the observations of the Crab Nebula at an age of a thousand years. The spectral evolution of the Crab Nebula in our model shows that the flux ratio of TeV gamma-rays to X-rays increases with time, which implies that old PWNe are faint in X-rays, but not in TeV gamma-rays. The increase of this ratio is because the magnetic field decreases with time and is not because the X-ray emitting particles are cooled more rapidly than the TeV gamma-ray emitting particles. Our spectral evolution model matches the observed rate of the radio flux decrease of the Crab Nebula. This result implies that our magnetic field evolution model is close to the reality. Finally, from the viewpoint of the spectral evolution, only a small fraction of the injected energy from the Crab Pulsar needs to go to the magnetic field, which is consistent with previous studies.
description: Accepted for publication in ApJ; 37 pages, 7 figures.
Abbiamo perso la concentrazione? Muoviamoci!
Creators: name: Rimoli Giambonini, Sonia
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2013

description: Quanto è difficile per i ragazzi di scuola media prestare attenzione in modo continuato durante le lezioni! Con questa ricerca-azione sono state proposte pause in movimento da svolgere in aula per riportare l’energia a disposizione dell’apprendimento. Trentatré esercizi sono stati selezionati e eseguiti regolarmente in una classe di prima media a ogni lezione di storia e civica, nonché all’ora di classe. Grazie alla rilevazione di dati qualitativi sono stati apportati aggiustamenti continui che hanno reso la pratica davvero efficace. Per gli allievi l’attività fisica è diventata una componente imprescindibile dalle lezioni. Sono stati ottenuti benefici sul piano della concentrazione, della chiarezza di idee e del rilassamento. Gli allievi hanno manifestato il bisogno di scaricare la tensione a scuola e riconosciuto che pause di movimento in aula soddisfano tale bisogno più del movimento spontaneo realizzato durante la ricreazione. Il tempo dedicato agli esercizi fisici non è stato sottratto all’insegnamento e all’apprendimento e non ha ecceduto il tempo generalmente preso dalle distrazioni e dai conseguenti richiami. La docente ha affrontato le situazioni di distrazione con minore stress e dispiego di energia, consapevole che un paio di esercizi avrebbe riportato la calma. Per le scuole medie, la ricerca svolta ha messo in evidenza l’opportunità di introdurre pause in movimento che permettano agli allievi di riportare la loro attenzione sui contenuti didattici. Relatore: Cleto Canonica. Materia: storia, civica e scienze dell'educazione
Andar per licheni
Creators: name: Gianoli, Nadia
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2015

description: L’interesse per i licheni è ad oggi molto limitato, pochi studiosi vi si cimentano e, ancora meno, escursionisti e amanti della natura si interessano a questi organismi che sono lo specchio della salute ambientale. Essendo poco appariscenti passano inosservati alla prima occhiata, una più approfondita indagine rivela forme e colori affascinanti e unici. In Val Piora, oltre a incantevoli paesaggi, si trovano condizioni favorevoli allo sviluppo di un’elevata biodiversità. L’attuale sentiero didattico è agevolmente praticabile da un’ampia fascia di popolazione e per questo vi sono i requisiti ideali per andare alla scoperta delle svariate diversità biologiche che esistono lungo il percorso. Il mio lavoro di ricerca è volto, oltre a far conoscere questi esseri viventi, a rendere consapevoli le persone sull’importanza della biodiversità e della microbiologia, che si possono riscontrare anche nelle loro manifestazioni più nascoste. Migliorare le indicazioni e la segnaletica lungo il sentiero ritengo sia condizione essenziale per promuovere un turismo consapevole. Vorrei incentivare la passione per la scoperta, che conduce a una maggiore sensibilità verso la natura e al rispetto di essa, a partire da piccole forme di vita che apparentemente sembrano avere una scarsa importanza. È importante infatti anche far capire alle persone che i licheni sono esseri viventi, sicuramente più delicati di noi e che è fondamentale non danneggiarli staccandoli dal loro substrato o prelevandone inutilmente porzioni.
Delocalized-localized transition in a semiconductor two-dimensional honeycomb lattice
Creators: name: De Simoni, G.
name: Singha, A.
name: Gibertini, M.
name: Karmakar, B.
name: Polini, M.
name: Piazza, V.
name: Pfeiffer, L. N.
name: West, K. W.
name: Beltram, F.
name: Pellegrini, V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the magneto-transport properties of a two-dimensional electron gas in a modulation-doped AlGaAs/GaAs heterostructure subjected to a lateral potential with honeycomb geometry. Periodic oscillations of the magneto-resistance and a delocalized-localized transition are shown by applying a gate voltage. We argue that electrons in such artificial-graphene lattices offer a promising approach for the simulation of quantum phases dictated by Coulomb interactions.
Current status of the Data and Analysis Preservation effort in the PHENIX experiment
Creators: name: Potekhin, Maxim
Publisher: name: Zenodo
Year: 2023
Subjects: pv23
phenix
software
container
dap
docker
hepdata
opendata
reana
d+au
photon
π0

description: Talk presented at the PV2023 - Adding value (to) and preserving Scientific and Technical data conference, 2023
Quench sensitivity of an Al-Mg-Si-Cu aluminum alloy
Creators: name: Sundaresan Ramesh, Naveen
Publisher: name: University of British Columbia
Year: 2021

description: The use of aluminum extrusion alloys in automotive applications is increasing due to the requirement that vehicle weight be reduced. One of the steps involved in the processing of aluminum extrusion alloys is rapid cooling (or quenching) after the solution heat treatment. The term quench sensitivity refers to the relationship between mechanical properties and the cooling rate after solution treatment. In this study, two initial microstructures were produced from the as-received alloy using different thermomechanical processing routes to study quench sensitivity: in the first case, the as-received microstructure underwent a solution treatment of 5 minutes at 550 C to produce a predominantly unrecrystallized grain structure, and in the second case, the material was rolled at room temperature prior to a solution treatment of 5 minutes at 550 C to produce a recrystallized grain structure. The main objective of this study was to measure the quench sensitivity of the two initial microstructures. The variation of hardness with cooling rates was examined using a modified Jominy test, and the variation of yield strength and ultimate tensile strength with quench rates was characterized using tensile tests. Hardness, yield strength, ultimate tensile strength and ductility were found to decrease with decreasing cooling rates. The reduction in the mechanical properties was attributed to the loss of solute atoms which precipitates as coarse precipitates during slow cooling. Slow cooling typically results in a higher number of grain boundary precipitates and a wider precipitate free zone (PFZ) adjacent to the grain boundary, which increases the propensity of intergranular fracture. Finally, using a polycrystal plasticity model, the degree of strain localization within the PFZs was studied for different idealized geometries.
Mass Hierarchies in Lorentz-Violation-induced Dynamical Mass Models
Creators: name: Alexandre, Jean
name: Mavromatos, Nick E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the issue of fermion mass hierarchies between lepton and quark families in toy models of dynamical generation of fermion masses through minimal Lorentz Invariance Violation. Realistic hierarchies in chiral theories necessitate an extended gauge structure, which includes both vector and axial-vector interactions.
description: 4 pages
Controlled Growth, Patterning and Placement of Carbon Nanotube Thin Films
Creators: name: Sangwan, V. K.
name: Ballarotto, V. W.
name: Hines, D. R.
name: Fuhrer, M. S.
name: Williams, E. D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Controlled growth, patterning and placement of carbon nanotube (CNT) thin films for electronic applications are demonstrated. The density of CNT films is controlled by optimizing the feed gas composition as well as the concentration of growth catalyst in a chemical vapor deposition process. Densities of CNTs ranging from 0.02 CNTs/μm^2 to 1.29 CNTs/μm^2 are obtained. The resulting pristine CNT thin films are then successfully patterned using either pre-growth or post-growth techniques. By developing a layered photoresist process that is compatible with ferric nitrate catalyst, significant improvements over popular pre-growth patterning methods are obtained. Limitations of traditional post-growth patterning methods are circumvented by selective transfer printing of CNTs with either thermoplastic or metallic stamps. Resulting as-grown patterns of CNT thin films have edge roughness (< 1 μm) and resolution (< 5 μm) comparable to standard photolithography. Bottom gate CNT thin film devices are fabricated with field-effect mobilities up to 20 cm^2/Vs and on/off ratios of the order of 10^3. The patterning and transfer printing methods discussed here have a potential to be generalized to include other nanomaterials in new device configurations.
The Truth About UFOs: Manifestations from a Non-Material Realm
Creators: name: Al-Sayram, Faisal Mohammed Zaid
Publisher: name: Zenodo
Year: 2025

description: This study explores the hypothesis that Unidentified Flying Objects (UFOs) are not physical alien spacecrafts, but luminous entities originating from a non-material dimension. Based on ancient and modern testimonies, religious accounts, and behavioral patterns, the research suggests these beings are closer in nature to angels—non-material, intelligent, and observing. The work presents scientific and spiritual reasoning, challenging traditional materialistic interpretations and offering a new framework for understanding these phenomena.
Stringy Stability of Dilaton Black Holes in 5-Dimensional Anti-de Sitter Space
Creators: name: Ong, Yen Chin
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Flat electrical charged black holes in 5-dimensional anti-de Sitter space have been applied to the study of the phase diagram of quark matter via AdS/CFT correspondence. In such application it is argued that since the temperature of the quark gluon plasma is bounded away from zero, the dual black hole cannot be arbitrarily cold, but becomes unstable due to stringy instability once it reaches sufficiently low temperature. We study the stringy stability of flat dilaton black holes with dilaton coupling $α=1$ in asymptotically anti-de Sitter space and show that unlike the purely electrically charged black hole, these dilaton black holes do not suffer from stringy instability.
description: Published in Proceedings of the Conference in Honor of Murray Gell-Mann's 80th Birthday, p.583-590, World Scientific, 2010, Singapore
The quantitative condition is necessary in guaranteeing the validity of the adiabatic approximation
Creators: name: Tong, D M
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The usual quantitative condition has been widely used in the practical applications of the adiabatic theorem. However, it had never been proved to be sufficient or necessary before. It was only recently found that the quantitative condition is insufficient, but whether it is necessary remains unresolved. In this letter, we prove that the quantitative condition is necessary in guaranteeing the validity of the adiabatic approximation.
description: 4 pages,1 figues
First Kepler results on compact pulsators I. Survey target selection and the first pulsators
Creators: name: Østensen, R. H.
name: Silvotti, R.
name: Charpinet, S.
name: Oreiro, R.
name: Handler, G.
name: Green, E. M.
name: Bloemen, S.
name: Heber, U.
name: Gänsicke, B. T.
name: Marsh, T. R.
name: Kurtz, D. W.
name: Telting, J. H.
name: Reed, M. D.
name: Kawaler, S. D.
name: Aerts, C.
name: Rodríguez-López, C.
name: Vučković, M.
name: Ottosen, T. A.
name: Liimets, T.
name: Quint, A. C.
name: Van Grootel, V.
name: Randall, S. K.
name: Gilliland, R. L.
name: Kjeldsen, H.
name: Christensen-Dalsgaard, J.
name: Borucki, W. J.
name: Koch, D.
name: Quintana, E. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present results from the first two quarters of a survey to search for pulsations in compact stellar objects with the Kepler spacecraft. The survey sample and the various methods applied in its compilation are described, and spectroscopic observations are presented to separate the objects into accurate classes. From the Kepler photometry we clearly identify nine compact pulsators, and a number of interesting binary stars. Of the pulsators, one shows the strong, rapid pulsations typical for a V361 Hya type sdB variable (sdBV), seven show long-period pulsations characteristic of V1093 Her type sdBVs, and one shows low-amplitude pulsations with both short and long periods. We derive effective temperatures and surface gravities for all the subdwarf B stars in the sample and demonstrate that below the boundary region where hybrid sdB pulsators are found, all our targets are pulsating. For the stars hotter than this boundary temperature a low fraction of strong pulsators (<10 per cent) is confirmed. Interestingly, the short-period pulsator also shows a low-amplitude mode in the long-period region, and several of the V1093 Her pulsators show low amplitude modes in the short-period region, indicating that hybrid behaviour may be common in these stars, also outside the boundary temperature region where hybrid pulsators have hitherto been found.
description: Accepted for publication in MNRAS
Optimal distillation of three-qubit W states
Creators: name: Yildiz, Ali
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Some of the asymmetric three qubit $W$ states are used for perfect teleportation, superdense coding and quantum information splitting. We present the protocols for the optimal distillation of the asymmetric as well as the symmetric $W$ states from a single copy of any three qubit $W$ class pure state.
description: 10 pages
Artefatti complementari per la didattica della geometria: la scoperta dei quadrilateri con artefatti concreti e tecnologici
Creators: name: Giovannangelo, Jacopo
Publisher: name: Scuola Universitaria della Svizzera Italiana (SUPSI)
Year: 2020

description: La ricerca, svolta con una pluriclasse di quarta e quinta elementare, aveva l’obiettivo di indagare in che modo l’uso combinato di artefatti complementari permettesse agli allievi di costruire dei significati inizialmente personali e poi socialmente condivisi sulle proprietà dei quadrilateri e la loro classificazione. Gli artefatti primari utilizzati erano sia di tipo concreto, come delle figure geometriche sovrapponibili in cartoncino e in plastica o come la tavolozza geometrica ideata da Ivo Dellagana, ma anche di tipo tecnologico, come il software di geometria dinamica GeoGebra. Gli allievi hanno interagito con questi artefatti, secondo il paradigma della mediazione semiotica, sia durante l’insegnamento in aula, sia in didattica a distanza durante la chiusura degli edifici scolastici a causa del Covid-19. Le evidenze raccolte dalla ricerca hanno mostrato un’evoluzione positiva delle competenze geometriche degli allievi, sia per quel che concerne la concettualizzazione delle proprietà distintive di alcuni quadrilateri, come il trapezio (che possiede almeno una coppia di lati paralleli) o il quadrato (come trapezio “più ricco” di proprietà) sia in relazione all’elaborazione di una classificazione inclusiva dei quadrilateri. Lo studio di casi utilizzato nella ricerca ha mostrato come l’evoluzione dei significati degli allievi sia legata all’interazione con tali artefatti e ha messo in luce la natura embodied dell’apprendimento in matematica. Relatrice: Rossana Falcade.
Illness perception and its influence in outcome and disability in patients with treatment resistant depression receiving rTMS treatment
Creators: name: Barbosa Menezes, Renata
Publisher: name: University of British Columbia
Year: 2021

description: Background: Depressive disorders are a significant burden to patients and society, possibly leading to catastrophic damage to one's life. Unfortunately, many of these patients become resistant to treatment. Therefore, identifying possible aspects that can influence treatment responsiveness and return to life activities has become essential. Illness perceptions have been associated with many different conditions, including depression, treatment adherence, functionality, and coping behaviours. Objectives: The objectives of this study were to describe illness perceptions in a sample of patients with treatment-resistant depression (TRD) undergoing repetitive transcranial magnetic stimulation (rTMS) treatment; to evaluate its correlation with changes in the level of disability and changes in depression symptoms after treatment; to identify the possible influence of treatment on illness perceptions changes over time. Methods: Participants with a history of treatment-resistant depression were referred from primary and secondary care to receive treatment with rTMS. Measurements were done at baseline and after treatment using BIPQ, HRSD-17, and Sheehan Disability Scale (SDS). Patients were followed for a total of 16 to 18 weeks. Results: The sample consisted of 62 participants. The majority were female with severe depression. Identity, consequences, concern, and emotional representations were very high before treatment and strongly associated with one another. Life stressors, genetics, and trauma were the most perceived causes of depression. There was an indication that identity and other dimensions could explain some of the variances in HRSD-17 scores after rTMS, and perceived identity could also explain the variance in work/school, social, and family/home scores. rTMS appeared to be correlated with changes in illness dimensions after treatment. Conclusions: Depression takes over a patient's perception and life experience affecting social, professional, and personal life aspects. Most illness perceptions in TRD patients are severe and can mildly explain changes in symptoms and functioning over time. Changes in illness perception are part of the common-sense model's dynamic feedback and could partially be attributed to treatment in this sample.
Search for the Rare Radiative Decay: $W\rightarrowπγ$ in \ppbar\ Collisions at $\sqrt{s} = 1.96$ TeV
Creators: name: CDF Collaboration
name: Aaltonen, T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a search for the rare radiative decay \wpigamma\ using data corresponding to an integrated luminosity of 4.3 \invfb\ of proton-antiproton collisions at a center of mass energy of 1.96 TeV collected by the CDF experiment at Fermilab. As no statistically significant signal is observed, we set a 95% confidence level upper limit on the relative branching fraction \bratio\ at $6.4\times 10^{-5}$, a factor of 10 improvement over the previous limit.
Quantifying the utility of personalized treatment decision rules : extending and comparing two metrics for summarizing the heterogeneity of treatment effects
Creators: name: Xia, Yuan
Publisher: name: University of British Columbia
Year: 2021

description: The treatment benefit prediction model is a type of clinical prediction model that quantifies the magnitude of treatment benefit given an individual's unique characteristics. As the topic of treatment effect modelling is relatively new, quantifying and summarizing the performance of treatment benefit models are not well studied. The "concordance-statistic for benefit" and the "concentration of benefit index" are two newly developed metrics that evaluate the discriminative ability of the treatment benefit prediction. However, the similarities and differences between these two metrics are not yet explored. We compare and contrast the metrics from conceptual, theoretical, and empirical perspectives and illustrate the application of the metrics. We consider the common scenario of a logistic regression model for a binary response developed based on data from a randomized controlled trial with two treatment arms. This dissertation provides two major contributions: first, the two metrics are expanded into three pairs of metrics, each having a particular scope; second, it provides results of theoretical and simulation studies that compare and contrast the construct and empirical behaviour of these metrics. We found that the heterogeneity of treatment effect appropriately influences these metrics. Metrics related to the "concordance-statistic for benefit" are sensitive to the unobservable correlation between counterfactual outcomes. In a case study, we quantify the metrics in a randomized controlled trial of acute myocardial infarction therapies on 30-day mortality. We conclude that these metrics help understand the heterogeneity of treatment effect and the consequent impact on treatment decision-making.
Influence of self-gravity on the runaway instability of black hole-torus systems
Creators: name: Montero, Pedro J.
name: Font, Jose A.
name: Shibata, Masaru
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Results from the first fully general relativistic numerical simulations in axisymmetry of a system formed by a black hole surrounded by a self-gravitating torus in equilibrium are presented, aiming to assess the influence of the torus self-gravity on the onset of the runaway instability. We consider several models with varying torus-to-black hole mass ratio and angular momentum distribution orbiting in equilibrium around a non-rotating black hole. The tori are perturbed to induce the mass transfer towards the black hole. Our numerical simulations show that all models exhibit a persistent phase of axisymmetric oscillations around their equilibria for several dynamical timescales without the appearance of the runaway instability, indicating that the self-gravity of the torus does not play a critical role favoring the onset of the instability, at least during the first few dynamical timescales.
description: To appear on Phys.Rev.Lett
title: Igniting a passion for reading: what support do parents need to foster a passion for reading in their children?
Creators: name: Sanderson, Tracey
Publisher: name: University of Southern Queensland
Year: 2021
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: Through the collation of parents' experiences, this qualitative research focused on including the voices of parents to promote a passion for reading in their children. The rise of aliteracy, the burgeoning impact of crowded leisure time for children, and the increasingly complex daily lives of parents, all impact on promoting reading for pleasure and require support for parents to be offered in sympathetic and sustainable ways. The research is underpinned by the social constructivism of Dewey's educational and social philosophical interest in experience, situation, interaction, and community (Dewey, 1986; Giles & Eyler, 1994) and the support Bronfenbrenner's ecological systems theory offers parents. Parents in regional south-east Queensland were interviewed to examine their approach to promoting reading for pleasure with their children and to ascertain their recommendations for supporting other parents. Parents participated in a pre-interview survey, followed by a semi-structured interview, under the challenging circumstances of the 2020 COVID-19 pandemic. The semi-structured approach to interviews enabled flexible conversations with parents informing understanding of their thoughts and ideas pertaining to the phenomena of reading for pleasure. Parents' perspectives are examined using Interpretative Phenomenological Analysis (IPA) methodology. Data were analysed and interpreted using Hramiak's (2005) approach in the IPA style. The value of hearing participants' voices (Harreveld, 2004) throughout the study provided the connections other parents can use, and teachers can support, to create a passion for reading in individual situations. This research reveals a range of strategies parents see as useful in supporting a passion for reading and provides the opportunity for a direct contribution of parents to be acknowledged. To effectively support parents, the principles of adult learning and acknowledging parents' unique funds of knowledge are the fuel required to ignite a new approach. The lack of parents' voices is evident in the literature, rendering efforts to promote a passion for reading for children ineffectual. Children's passion for reading will suffer if the significant adults in their lives are not sufficiently supported and empowered to make lasting changes.
Young stellar populations in the Antennae galaxies
Creators: name: Gunawardhana, Madusha
name: None
Publisher: name: Zenodo
Year: 2019

description: We use the spatially resolved MUSE guaranteed time observations of the Antennae galaxies to study the properties of HII regions with high SFRs. The high signal-to-noise spectroscopic observations with extended wavelength coverage show numerous stellar and nebular features commonly seen in spectra of starbursts, such as Wolf-Rayet features, Forbidden, Balmer and higher order Paschen lines. By self constantly modelling many of these features, we constrain the characteristic properties (e.g. stellar and gas metallicities, gas temperature etc.) of young stellar populations in these regions, which appear to be dominated by an approximately 4 Myr old stellar population. I will present intrinsic H$\alpha$ SFRs and characteristic properties of these high SFR HII regions.
The stickiness of sound: An absolute lower limit on viscosity and the breakdown of second order relativistic hydrodynamics
Creators: name: Kovtun, Pavel
name: Moore, Guy D.
name: Romatschke, Paul
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Hydrodynamics predicts long-lived sound and shear waves. Thermal fluctuations in these waves can lead to the diffusion of momentum density, contributing to the shear viscosity and other transport coefficients. Within viscous hydrodynamics in 3+1 dimensions, this leads to a positive contribution to the shear viscosity, which is finite but inversely proportional to the microscopic shear viscosity. Therefore the effective infrared viscosity is bounded from below. The contribution to the second-order transport coefficient $τ_π$ is divergent, which means that second-order relativistic viscous hydrodynamics is inconsistent below some frequency scale. We estimate the importance of each effect for the Quark-Gluon Plasma, finding them to be minor if $η/s = 0.16$ but important if $η/s = 0.08$.
description: 16 pages including two figures
Making and using digital (critical) editions of Christian texts from antiquity: The Patristic Text Archive (PTA)
Creators: name: Von Stockhausen, Annette
Publisher: name: Zenodo
Year: 2022
Subjects: PatristicTextArchive
TEI
Digital edition

description: These are the slides (open index.html in your browser) and script (open PTA_AIEP.md with a text editor) to the video at the YouTube channel of the International Association of Patristic Studies / Association Internationale d’Études Patristiques: https://www.youtube.com/watch?v=8q7PgteYE8g.
A Note on Dual MHV Diagrams in N=4 SYM
Creators: name: Brandhuber, Andreas
name: Spence, Bill
name: Travaglini, Gabriele
name: Yang, Gang
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently a reformulation of the MHV diagram method in N=4 supersymmetric Yang-Mills theory in momentum twistor space was presented and was shown to be equivalent to the perturbative expansion of the expectation value of a supersymmetric Wilson loop in momentum twistor space. In this note we present related explicit Feynman rules in dual momentum space, which should have the interpretation of Wilson loop diagrams in dual momentum space. We show that these novel rules are completely equivalent to ordinary spacetime MHV rules and can be naturally viewed as their graph dual representation.
description: 16 pages, 11 figures
Dynamics of entanglement in a two-dimensional spin system
Creators: name: Xu, Qing
name: Sadiek, Gehad
name: Kais, Sabre
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the time evolution of entanglement in a finite two dimensional transverse Ising model. The model consists of a set of 7 localized spin-1/2 particles in a two dimensional triangular lattice coupled through nearest neighbor exchange interaction in presence of an external time dependent magnetic field. The magnetic field is applied in different function forms: step, exponential, hyperbolic and periodic. We found that the time evolution of the entanglement shows an ergodic behavior under the effect of the time dependent magnetic fields. Also we found that while the step magnetic field causes great disturbance to the system creating rabid oscillations, the system shows great controllability under the effect of the other magnetic fields where the entanglement profile follows closely the shape of the applied field even with the same frequency for periodic fields. This follow up trend breaks down as the strength of the field, the transition constant for exponential and hyperbolic, or frequency for periodic field increase leading to rapid oscillations. We observed that the entanglement is very sensitive to the initial value of the applied periodic field, the smaller the initial value the less distorted is the entanglement profile. Furthermore, the effect of thermal fluctuations is very devastating to the entanglement which decays very rapidly as the temperature increases. Interestingly, although large value of the magnetic field strength may yield small entanglement, it was found to be more persistent against thermal fluctuations than the small field strengths.