cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the Divergence of the Ferromagnetic Susceptibility in the SU(N) Nagaoka-Thouless Ferromagnet
Creators: name: Singh, Rajiv R. P.
name: Oitmaa, Jaan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Using finite temperature strong coupling expansions for the SU(N) Hubbard Model, we calculate the thermodynamic properties of the model in the infinite-$U$ limit for arbitrary density $0\leq ρ\leq 1$ and all $N$. We express the ferromagnetic susceptibility of the model as a Curie term plus a $Δχ$, an excess susceptibility above the Curie-behavior. We show that, on a bipartite lattice, graph by graph the contributions to $Δχ$ are non-negative in the limit that the hole density $δ=1-ρ$ goes to zero. By summing the contributions from all graphs consisting of closed loops we find that the low hole-density ferromagnetic susceptibility diverges exponentially as $\exp{Δ/T}$ as $T \to 0$ in two and higher dimensions. This demonstrates that Nagaoka-Thouless ferromagnetic state exists as a thermodynamic state of matter at low enough density of holes and sufficiently low temperatures. The constant $Δ$ scales with the SU(N) parameter $N$ as $1/N$ implying that ferromagnetism is gradually weakened with increasing $N$ as the characteristic temperature scale for ferromagnetic order goes down.
description: 5 pages, 1 figure
Tema 2. Enfermedades inmunoprevenibles
Creators: name: Montesdeoca-Ramírez, Daniela-Celia
name: Morales-Gázquez, María-José
Publisher: name: Zenodo
Year: 2022
Subjects: subject: Enfermedades inmunoprevenibles
subject: Prevención
subject: Vacunas
subject: 42413

description: Material docente relacionado con la asignatura CEAPS (42413). Universidad de Las Palmas de Gran Canaria
Implications of an extended dark energy model with massive neutrinos
Creators: name: Sharma, Ravi Kumar
name: Pandey, Kanhaiya Lal
name: Das, Subinoy
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Recently there has been reports of finding a lower bound on the neutrino mass parameter ($Σm_ν$) when using ACT and SPTpol data however these bounds on the $Σm_ν$ are still weaker for most case around at 1 $σ$ level. In this context, here in this work, we study the consequences of using an enlarged four parameter dynamical dark energy equation of state on neutrino mass parameter as well as on the Hubble and S8 tensions. The four parameter dark energy equation of state incorporates a generic non-linear monotonic evolution of the dark energy equation of state, where the four parameters are the early and the present value of the equation of state, the transition scale factor and the sharpness of the transition. We report that with lensing-marginalized Planck + BAO + Pantheon and prior on absolute magnitude $M_B$ and KIDS/Viking $S_8$ prior, the model favours a non-zero value for the neutrino mass parameter at the most at $\sim 1 σ$ level ($Σm_ν= 0.1847_{-0.165}^{+0.0698}$ eV). In this case this model also brings down the Hubble tension to $\sim 2.5 σ$ level and the S8 tension to $\sim$ 1.5 $σ$ level. This model also provide a tighter constraints on the value of the dark energy equation of state at present epoch $w_0$ ($w_0 = -0.9901_{-0.0766}^{+0.0561}$) in comparison to the CPL like parameterization.
description: accepted for Astrophysical Journal,more figures added
UNA POLAROID DAL FUTURO: UNA NOTTE A SAN JUNIPERO
Creators: name: De Santis, Riccardo
Publisher: name: Ground Breaking
Year: 2018

description: Un genere musicale (la dance), una serata al mese (nata per gioco) e un ricordo
“eterno”
description: Ground Breaking, N. 3 (2018)
Outside the Classroom: Spatial Considerations to Facilitate Community Relationships with Schools
Creators: name: Coulston, Benjamin
Publisher: name: University of Melbourne
Year: 2020
Subjects: Community planning
Urban design
Architectural design

description: Densification of urban environments has led to increased pressure on existing school infrastructure throughout Australia’s major cities and elsewhere. Schools have continued to evolve as part of this process and facilities are more frequently leveraged for both public use and enabled for a range of education-related activities that foster community building. Design and procurement of schools currently builds upon acceptable minimum standards that often lack generosity to establish social spaces and spatial facilities that can be ‘borrowed’ by external users and provide critical social benefits. Through a review of New South Wales’ planning policy this article aims to identify the benefits of providing school infrastructure facilities that compliment public assets. It also discusses the challenges faced with the delivery of these assets within an on-going trend of urbanisation. It is argued that on-going planning for school environments will need to consider a holistic, community-wide view through a considered approach to shared facilities.
Maximal quantum chaos of the critical Fermi surface
Creators: name: Tikhanovskaya, Maria
name: Sachdev, Subir
name: Patel, Aavishkar A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the many-body quantum chaos of non-Fermi liquid states with Fermi surfaces in two spatial dimensions by computing their out-of-time-order correlation functions. Using a recently proposed large $N$ theory for the critical Fermi surface, and the ladder identity of Gu and Kitaev, we show that the chaos Lyapunov exponent takes the maximal value of $2 πk_B T/\hbar$, where $T$ is the absolute temperature. We also examine a phenomenological model in which the chaos exponent becomes smaller than the maximal value precisely when quasiparticles are restored.
description: Updated with more information on the phenomenological model and other minor corrections and clarifications. Main manuscript 6 pages, SI 9 pages
Bayesian inference of the fluctuating proton shape
Creators: name: Mäntysaari, Heikki
name: Schenke, Björn
name: Shen, Chun
name: Zhao, Wenbin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using Bayesian inference, we determine probabilistic constraints on the parameters describing the fluctuating structure of protons at high energy. We employ the color glass condensate framework supplemented with a model for the spatial structure of the proton, along with experimental data from the ZEUS and H1 Collaborations on coherent and incoherent diffractive $\mathrm{J}/ψ$ production in e+p collisions at HERA. This data is found to constrain most model parameters well. This work sets the stage for future global analyses, including experimental data from e+p, p+p, and p+A collisions, to constrain the fluctuating structure of nucleons along with properties of the final state.
description: 12 pages, 2 figures. 1000 parameterizations sampled from the determined posterior distributions are included in the source package
On quantum states over time
Creators: name: Fullwood, James
name: Parzygnat, Arthur J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Category Theory (math.CT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In 2017, D. Horsman, C. Heunen, M. Pusey, J. Barrett, and R. Spekkens proved that there is no physically reasonable assignment that takes a quantum channel and an initial state and produces a joint state on the tensor product of the input and output spaces. The interpretation was that there is a clear distinction between space and time in the quantum setting that is not visible classically, where in the latter, one can freely use Bayes' theorem to go between joint states and marginals with noisy channels. In this paper, we prove that there actually is such a physically reasonable assignment, bypassing the no-go result of Horsman et al., and we illustrate that this is achievable by restricting the domain of their assignment to a domain which represents the given data more faithfully.
description: v3: minor clarifications added
Vertical Schools as Community Hubs in Residential Neighbourhoods
Creators: name: Aminpour, Fatemeh
Publisher: name: University of Melbourne
Year: 2020
Subjects: Architectural design
Community planning
Urban analysis and development
Urban design

description: Vertical schools are created in response to increasing residential density and land scarcity in metropolitan areas. This school typology is new in Australia and often provides high-quality facilities that the community can hire. As vertical schools and their communities become reliant on the use of shared spatial resources, their interdependencies should be considered at different stages of planning, design and management of the schools. This paper presents some successful urban design and planning considerations that lead to a safe and convenient sharing of resources by vertical schools and their neighbourhoods, through a socio-ecological framework. The analysis of five Australian vertical schools explores physical, social and organisational dimensions: the characteristics of schools (presence of sports fields and common areas); the characteristics of the neighbourhood (pedestrian network connectivity, presence of parks, library and grassed fields, barriers for the protection of children from vehicles); the social characteristics (number of students, volume of traffic in the neighbourhood, pedestrian traffic, parental concerns for safe child travel); the organisational dimensions (presence of traffic control devices, street lighting, road crossing, parking lots); and collaboration between the school and their local agencies (facility management of schools, their neighbourhoods and administration of timetables for the shared use). For the community to share the school and neighbourhood resources successfully, these dimensions can be used as a starting point to understand the need for developing a more comprehensive framework. The shared use of facilities can strengthen the concept of vertical schools as community hubs and increase the availability of recreational resources for both children and other members of the community in high-density neighbourhoods.
Dataset MPVh y2019m02
Creators: name: Mendoza, Juana Del Valle
name: Valle, Luis J. Del
name: Verne, Eduardo
name: Orellana-Peralta, Fiorella
name: Ugarte, Claudia
name: Aguilar-Luis, Miguel Angel
Publisher: name: Figshare
Year: 2019
Subjects: subject: 110802 Medical Infection Agents (incl. Prions)
subject: FOS: Health sciences

description: Background: Human Metapneumovirus (hMPV) is a negative single-stranded RNA virus. Infection by hMPV mainly affects the pediatric population and can cause upper or lower respiratory tract pathologies which can develop life threating complications. This study was carried out between 2009 and 2010 in a high complexity national hospital in Lima, Peru. The time frame corresponds to the pandemic of influenza A H1N1. Methods: RT-PCR was utilized to attain the amplification and identification of the virus.Results: A total of 539 samples were analized from patients with a clinical context suggestive of an acute respiratory tract infection. Of these samples 73 (13.54%) were positive for hMPV. Out of the positive cases, 63% were under 1 year old, and increased to nearly 80% when considering children younger than 2 years old. Cough was the most frequent symptom presented by our population with a number of 62 cases (84.93%). Viral seasonality was also established, noting its predominance during the months of summer in the southern hemisphere.Conclusions: The infection by hMPV has an important prevalence in Peru. It mainly affects children under 1 year old and can cause both upper and lower respiratory tract infections that can develop into potential life threating complications.
Translation and Rotation Equivariant Normalizing Flow (TRENF) for Optimal Cosmological Analysis
Creators: name: Dai, Biwei
name: Seljak, Uros
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Our universe is homogeneous and isotropic, and its perturbations obey translation and rotation symmetry. In this work we develop Translation and Rotation Equivariant Normalizing Flow (TRENF), a generative Normalizing Flow (NF) model which explicitly incorporates these symmetries, defining the data likelihood via a sequence of Fourier space-based convolutions and pixel-wise nonlinear transforms. TRENF gives direct access to the high dimensional data likelihood p(x|y) as a function of the labels y, such as cosmological parameters. In contrast to traditional analyses based on summary statistics, the NF approach has no loss of information since it preserves the full dimensionality of the data. On Gaussian random fields, the TRENF likelihood agrees well with the analytical expression and saturates the Fisher information content in the labels y. On nonlinear cosmological overdensity fields from N-body simulations, TRENF leads to significant improvements in constraining power over the standard power spectrum summary statistic. TRENF is also a generative model of the data, and we show that TRENF samples agree well with the N-body simulations it trained on, and that the inverse mapping of the data agrees well with a Gaussian white noise both visually and on various summary statistics: when this is perfectly achieved the resulting p(x|y) likelihood analysis becomes optimal. Finally, we develop a generalization of this model that can handle effects that break the symmetry of the data, such as the survey mask, which enables likelihood analysis on data without periodic boundaries.
description: 11 pages, 10 figures. Submitted to MNRAS. Comments welcome
Huellas
Creators: name: de los Ríos Trujillo, Jefferson Daniel
Publisher: name: Zenodo
Year: 2022
Subjects: Poema

description: Qué pentagrama inmenso es este mundo,
 notado intermitente del zapato,
 y más se afije el taco mientras trato
 vibrar para saberme ser rotundo.
 Acaba en miriñaque tremebundo;
 muda en basquiña, nítido no: sato,
 o a mano, timorato
 de acento más rotundo.
I NUOVI TESSUTI 3.0 CHE FANNO BENE ALL'AMBIENTE
Creators: name: Bordoni, Camilla
Publisher: name: Ground Breaking
Year: 2018

description: Nuovi metodi di lavorazione, tessuti, stilisti e aziende che puntano sul rispetto
dell’ambiente; parola d’ordine: vietato scartare
description: Ground Breaking, N. 3 (2018)
NuSTAR and AstroSat observations of thermonuclear X-ray bursts with short-recurrence times in 4U 1636$-$536
Creators: name: Roy, Pinaki
name: Beri, Aru
name: Mondal, Aditya S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report results from the spectro-timing analysis of the atoll source 4U 1636$-$536 observed with NuSTAR and AstroSat during its hard spectral state. In three observations of 207 ks total exposure, we identify 31 thermonuclear X-ray bursts including five doublets and a triplet. Recurrence time as short as 3.8 minutes is seen in one of the doublets. To the best of our knowledge, this is the shortest recurrence time known for this source. Our time-averaged spectroscopy during the bursts indicate the presence of an additional powerlaw or a blackbody component in a few cases, perhaps due to varying temperatures during bursts or plausible deviation from ideal blackbody behavior, however, it is difficult to probe this using the time-resolved spectroscopy owing to limited statistics. Time-resolved bursts are well fit using an absorbed blackbody model with temperatures varying between 1.7 and 2.2 keV. Burst oscillations around 581 Hz are detected with 3$σ$ confidence during the decay phase in two of the X-ray bursts. One of the burst oscillations is seen at 582 Hz, a frequency observed during the 2001 superburst in this source.
description: 11 pages, 9 figures, 3 tables. Accepted for publication in the special issue of JAA, "Astrophysical jets and observational facilities: National perspective"
Calvary Community Hub: Concept Designs in Response to the Needs of a Thriving Community Hub
Creators: name: Branford, Angela K
name: Moeck, Peter E.
Publisher: name: University of Melbourne
Year: 2020
Subjects: Architectural design
Community planning

description: The Calvary Community comprises Calvary Lutheran Primary School, Calvary Lutheran Church, Calvary Kindergarten, Noarlunga Children’s Centre, an Opportunity Shop, Men’s Shed, and Emergency Housing in Morphett Vale, South Australia. This paper outlines how ‘Family Zone’, a model that aims to bring together a range of support programs to break a generational cycle of marginalisation, will be adopted to create a thriving Calvary Community Hub. This parenting program developed by Lutheran Community Care focuses on family wellbeing by providing access to needs-based professional and volunteer assistance. Building trust and rapport is the key to long term relationship change and improved lifelong outcomes. The existing co-location can be enhanced by developing a common vision and purpose. Overcoming operational barriers and sharing resources is a challenge. A collaborative and cooperative approach can deliver on the aspirations articulated in this paper. Architectural concept designs developed in response to the needs of a thriving Calvary Community Hub are provided.
Práctica de Aula 2. DTP-VPI
Creators: name: Montesdeoca-Ramírez, Daniela Celia
name: Morales-Gázquez, Mª José
Publisher: name: Zenodo
Year: 2022
Subjects: subject: Vacunas
subject: Difteria
subject: Tétanos
subject: Tosferina
subject: Poliomielitis
subject: 42413

description: Material docente de la asignatura CEAPS (42413)
Tidal Disruption Events by Compact Supermassive Black Hole Binaries
Creators: name: Ryu, Taeho
name: Trani, Alessandro A.
name: Leigh, Nathan W. C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Stars can be tidally destroyed or swallowed by supermassive black hole binaries. Using a large number of accurate few-body simulations, we investigate the enhancement and suppression of full and partial disruption and direct capture events by hard supermassive black hole binaries with a wide ranges of key parameters, i.e., the primary black hole mass ($10^{5}-10^{8}M_{\odot}$), the binary mass ratio ($10^{-3}-1$), the ratio of the binary semimajor axis to the hardening radius ($10^{-4}-1$), the binary eccentricity ($0.0-0.9$) and the stellar mass ($0.3-3M_{\odot}$). This is a significant extension of the parameter space compared to previous work. We show that the encounter probabilities of all three events are well-described by the encounter cross section, which is proportional to the pericenter distance. The probability of full disruptions by supermassive black hole binaries can be enhanced by up to a factor of $40-50$ or suppressed by up to a factor of $10$, relative to that by single black holes, depending on the binary parameters. Relativistic effects are not important for the primary black hole mass $\leq 10^{7}M_{\odot}$, but can provide an additional enhancement of the full disruption probability by less than a factor of $2-3$ for higher primary black hole masses. We provide a fitting formula for the full disruption probability by the hard supermassive black hole binaries that works for a wide range of parameters. We also find that partial disruption events can occur multiple times before full disruptions or direct captures, and their probabilities can be greater than that of full disruption events by a factor of three. Because partial disruption events can induce stellar spins and mass loss and change the orbits, it can significantly affect the overall full disruption event rate and the shape of the light curves.
description: 16 pages, 14 figures and 2 tables, accepted for publication in MNRAS
The Family Zone: A School-based Multi-Partnership Approach to Child and Family Wellbeing
Creators: name: Goodenough, Leigh
name: Wilson, Kathlene
Publisher: name: University of Melbourne
Year: 2020
Subjects: Early childhood education
Other education not elsewhere classified
Community child health
Family care

description: Schools can be vitally important centres of family safety and wellbeing, as evidenced by the Family Zone managed by Lutheran Community Care at Ingle Farm Primary School in northern Adelaide. The co-location of the Family Zone occurred through a lease agreement with the SA Minister of Education, works in close affiliation with school leadership, and is funded through Commonwealth, state, philanthropic and local donor sources. The Family Zone sustains access to health, family wellbeing and child protection services alongside the school and a co-located state-funded Children’s Centre. This arrangement offers a case study of a particular model of schools as community hubs. The community benefit of the Family Zone prompts suggestions for policy development to optimise the re-utilisation of existing school facilities and the design and provision of new school-based resources to achieve enhanced community connections and wellbeing.
Our Place: Opening the School Gates to the Community
Creators: name: Fraser, Alexandra
name: Rutherford, Margaret
Publisher: name: University of Melbourne
Year: 2020
Subjects: Community child health
Family care
Community planning
Architectural design

description: The built environment plays an important role in the Our Place approach to improving outcomes for children, families and communities. Our Place is a holistic place-based approach to supporting the education, health and development of all children and families in disadvantaged communities. It utilises the universal platform of a school. Single, shared entrances in Our Place sites are a key feature of the approach. This entails a deliberate attempt to change the way schools are used by communities and the way services and supports are offered to vulnerable families. The expansion of the Our Place approach from one site to ten schools across the state has brought about many barriers to implementing the ideal entrance concept. This is due to the diverse nature of the communities and the differences in the level of influence over building design and construction. In the absence of a formal evaluation of the single, shared entrance concept, this paper will explore emerging themes around scaling up the Our Place outcomes focused, place-based initiative utilising schools as a universal platform.
A rapidly fading star as a type II obscuring intermediate luminosity optical transient (ILOT) in a triple star system
Creators: name: Bear, Ealeal
name: Soker, Noam
name: Kashi, Amit
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We propose a triple-star scenario where the merger of two pre-main sequence low mass stars, <0.5Mo, ejects a dusty equatorial outflow that obscures and temporarily causes the disappearance of a massive star, >8Mo. The merger of the low-mass inner binary powers a faint outburst, i.e., a faint intermediate luminosity optical transient (ILOT), but its main effect that can last for decades is to (almost) disappear the luminous massive star of the triple system. The typical orbital period of the triple system in about a year. The merger process proceeds as the more massive star of the two low-mass pre-main sequence star starts to transfer mass to the least massive star in the triple system and as a result of that expands. This 'type II obscuring ILOT' scenario in a triple star system might account for the fading, re-brightening, and then re-fading of the massive post-main sequence star M101-OC1. It might recover in about 20-100 year. Our study strengthens the claim that there are alternative scenarios to account for the (almost) disappearing of massive stars, removing the need for failed supernovae. In these scenarios the disappearing is temporary, months to decades, and therefore at later time the massive star explodes as a core collapse supernova even if it forms a black hole.
description: Accepted for publication in ApJ
Didacticiel du style de citation Chicago Manual of Style, 17e édition (méthode notes et bibliographie)
Creators: Sarah Shaughnessy
Publisher: name: University of Alberta Library
Year: 2022

Ce livre est une adaptation d’une oeuvre publié par la Bibliothèque de l’Université d’Ottawa créé au profit de la communauté du Campus Saint-Jean. Ce didacticiel discute de l’importance des citations et explique en détails les principaux éléments des références et des citations dans le texte d’après les directives de la 17e édition du manuel du style de citation Chicago. Une lecture en profondeur d’au moins une heure et demie est nécessaire pour atteindre les objectifs d’apprentissage. Ce didacticiel peut également être utilisé comme ressource de référence.
A 21st Century Learning Hub: A Case Study of a 'Joint Use' School and Community Learning Facility
Creators: name: Tordoff, David
name: Atkin, Julia
Publisher: name: University of Melbourne
Year: 2020
Subjects: Architectural design
Architectural heritage and conservation
Community planning

description: This case study demonstrates a successful merging of previously separate community, school, cultural, health, wellbeing, and tertiary facilities within a new hub in the regional centre of Young, New south Wales (NSW). It describes the collaboration between state and local government, architects, educators and community representatives. It details the conception of the facility from within the community, the multiple stakeholders and policies involved and the architectural response to a complex brief, a fortuitous multilayered historical site, and a diverse cultural context. Australia wide, Governments are searching for more effective and efficient use of public infrastructure. Shared use of schools, whereby they are encouraged to make their facilities available for community use, is relatively common in the State of NSW. It is only recently that ‘joint use’ projects which involve significant investments by multiple parties have been promoted in that State. Joint use projects have the potential to open myriad learning opportunities for a community. For example, there are few places of public infrastructure that represent the learning culture and pulse of a school, or community, like a library. For communities, the information they contain, the events hosted, and the spaces for hire are intrinsically tied to the culture of the local community. In secondary schools, libraries remain at the heart of learning. They are places that students inevitably gravitate to as a space for collaborative project work, social interaction, meetings, and events. In regional towns the roles of both are magnified. These library aspirations both complement and compete, while opening up opportunities for use of a wide variety of school learning facilities by the community and re-integrating school with the broader community.
Puerto alterno
Creators: name: Ronderos, Clara Eugenia
Publisher: name: Zenodo
Year: 2022
Subjects: Poema

description: Siempre quise vivir frente a un océano
 enorme, salvaje, ilimitado.
 Me ha tocado en suerte un lago
 pequeño, calmo,
 espejo de árboles,
 de pájaros pasando.
 Las gaviotas rabiosas y tremendas
 se han quedado allá
 en esas orillas
 perdidas.
First hard X-ray imaging results by Solar Orbiter STIX
Creators: name: Massa, Paolo
name: Battaglia, Andrea F.
name: Volpara, Anna
name: Collier, Hannah
name: Hurford, Gordon J.
name: Kuhar, Matej
name: Perracchione, Emma
name: Garbarino, Sara
name: Massone, Anna Maria
name: Benvenuto, Federico
name: Schuller, Frederic
name: Warmuth, Alexander
name: Dickson, Ewan C. M.
name: Xiao, Hualin
name: Maloney, Shane A.
name: Ryan, Daniel F.
name: Piana, Michele
name: Krucker, Säm
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context. The Spectrometer/Telescope for Imaging X-rays (STIX) is one of 6 remote sensing instruments on-board Solar Orbiter. It provides hard X-ray imaging spectroscopy of solar flares by sampling the Fourier transform of the incoming flux. Aims. To show that the visibility amplitude and phase calibration of 24 out of 30 STIX sub-collimators is well advanced and that a set of imaging methods is able to provide the first hard X-ray images of the flaring Sun from Solar Orbiter. Methods. We applied four visibility-based image reconstruction methods and a count-based one to calibrated STIX observations. The resulting reconstructions are compared to those provided by an optimization algorithm used for fitting the amplitudes of STIX visibilities. Results. When applied to six flares with GOES class between C4 and M4 which occurred in May 2021, the five imaging methods produce results morphologically consistent with the ones provided by the Atmospheric Imaging Assembly on-board the Solar Dynamic Observatory (SDO/AIA) in UV wavelengths. The $χ^2$ values and the parameters of the reconstructed sources are comparable between methods, thus confirming their robustness. Conclusions. This paper shows that the current calibration of the main part of STIX sub-collimators has reached a satisfactory level for scientific data exploitation, and that the imaging algorithms already available in the STIX data analysis software provide reliable and robust reconstructions of the morphology of solar flares.
Simple Genetic Operators are Universal Approximators of Probability Distributions (and other Advantages of Expressive Encodings)
Creators: name: Meyerson, Elliot
name: Qiu, Xin
name: Miikkulainen, Risto
Publisher: name: arXiv
Year: 2022
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: This paper characterizes the inherent power of evolutionary algorithms. This power depends on the computational properties of the genetic encoding. With some encodings, two parents recombined with a simple crossover operator can sample from an arbitrary distribution of child phenotypes. Such encodings are termed \emph{expressive encodings} in this paper. Universal function approximators, including popular evolutionary substrates of genetic programming and neural networks, can be used to construct expressive encodings. Remarkably, this approach need not be applied only to domains where the phenotype is a function: Expressivity can be achieved even when optimizing static structures, such as binary vectors. Such simpler settings make it possible to characterize expressive encodings theoretically: Across a variety of test problems, expressive encodings are shown to achieve up to super-exponential convergence speed-ups over the standard direct encoding. The conclusion is that, across evolutionary computation areas as diverse as genetic programming, neuroevolution, genetic algorithms, and theory, expressive encodings can be a key to understanding and realizing the full power of evolution.
description: Received a best paper award at GECCO 2022; 10 pages, with 5 page appendix
Práctica de Aula 4. SARUPA-VARICELA
Creators: name: Montesdeoca-Ramírez, Daniela Celia
name: Morales-Vázquez, Mª José
Publisher: name: Zenodo
Year: 2022
Subjects: subject: Vacuna
subject: SARUPA
subject: Varicela
subject: Sarampión
subject: Rubeola
subject: Parotiditis
subject: 42413

description: Material docente de la asignatura CEAPS (42413)
Combined significance of spatial coincidence of high energy neutrinos from PSR B1509-58 by Super-Kamiokande and MACRO
Creators: name: Desai, Shantanu
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In their searches for astrophysical point sources of high energy neutrinos, both the Super-Kamiokande and MACRO neutrino detectors saw the largest angular excess from the same source, viz. PSR B1509-58. We estimate the probability for the observed number of events by {\it both} Super-Kamiokande and MACRO to be a chance coincidence due to atmospheric neutrino background. We find that this probability is about 0.4%, corresponding to 2.6$σ$ significance. We also propose some additional tests to ascertain if this excess corresponds to an astrophysical signal or is only a background event.
description: 5 pages
Energy balance and Alfvén Mach numbers in compressible magnetohydrodynamic turbulence with a large-scale magnetic field
Creators: name: Beattie, James R.
name: Krumholz, Mark R.
name: Skalidis, Raphael
name: Federrath, Christoph
name: Seta, Amit
name: Crocker, Roland M.
name: Mocz, Philip
name: Kriel, Neco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Energy equipartition is a powerful theoretical tool for understanding astrophysical plasmas. It is invoked, for example, to measure magnetic fields in the interstellar medium (ISM), as evidence for small-scale turbulent dynamo action, and, in general, to estimate the energy budget of star-forming molecular clouds. In this study we motivate and explore the role of the volume-averaged root-mean-squared (rms) magnetic coupling term between the turbulent, $δ\mathbf{B}$ and large-scale, $\mathbf{B}_0$ fields, $\left< (δ\mathbf{B}\cdot\mathbf{B}_0)^{2} \right>^{1/2}_{\mathcal{V}}$. By considering the second moments of the energy balance equations we show that the rms coupling term is in energy equipartition with the volume-averaged turbulent kinetic energy for turbulence with a sub-Alfvénic large-scale field. Under the assumption of exact energy equipartition between these terms, we derive relations for the magnetic and coupling term fluctuations, which provide excellent, parameter-free agreement with time-averaged data from 280 numerical simulations of compressible MHD turbulence. Furthermore, we explore the relation between the turbulent, mean-field and total Alfvén Mach numbers, and demonstrate that sub-Alfvénic turbulence can only be developed through a strong, large-scale magnetic field, which supports an extremely super-Alfvénic turbulent magnetic field. This means that the magnetic field fluctuations are significantly subdominant to the velocity fluctuations in the sub-Alfvénic large-scale field regime. Throughout our study, we broadly discuss the implications for observations of magnetic fields and understanding the dynamics in the magnetised ISM.
description: Accepted in MNRAS. 20 pages. 16 figures. 1 table
Schools as Community Hubs: The Lasting Influence of John Dewey's Philosophy
Creators: name: Hron, Cynthia
Publisher: name: University of Melbourne
Year: 2020
Subjects: Community planning
Architectural design
Other education not elsewhere classified

description: This paper surveys both contemporary and historic interpretations of community schools with respect to philosopher John Dewey’s web of life concept, where life and pedagogical practice were viewed in terms of their interrelations. As Founder of The Laboratory School, completed in 1903 on the University of Chicago campus, he proposed distinctive facilities in keeping with his educational vision. Chicago Public School’s Community School Initiative, became the largest community schools’ system in the United States. Nettelhorst School is presented to illustrate the district’s mission. A circumscribed historical timeline provides context. The paper closes by assessing associations between curriculum, society, and the built environment, appraising a contemporary community school system in terms of Dewey’s ideas proposed more than a century ago.
Collisional-model quantum trajectories for entangled qubit environments
Creators: name: Daryanoosh, Shakib
name: Gilchrist, Alexei
name: Baragiola, Ben Q.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the dynamics of quantum systems interacting with a stream of entangled qubits. Under fairly general conditions, we present a detailed framework describing the conditional dynamical maps for the system, called quantum trajectories, when the qubits are measured. Depending on the measurement basis, these quantum trajectories can be jump-type or diffusive-type, and they can exhibit features not present with quantum optical and single-qubit trajectories. As an example, we consider the case of two remote atoms, where jump-type quantum trajectories herald the birth and death of entanglement.
description: 25 pages, 6 figures
Práctica de Aula 5. Hepatitis A y B
Creators: name: Montesdeoca-Ramírez, Daniela Celia
name: Morales-Gázquez, Mª José
Publisher: name: Zenodo
Year: 2022
Subjects: subject: Vacuna
subject: Hepatitis A
subject: Hepatitis B
subject: 42413

description: Material docente de la asignatura CEAPS (42413)
Algorithm and System Co-design for Efficient Subgraph-based Graph Representation Learning
Creators: name: Yin, Haoteng
name: Zhang, Muhan
name: Wang, Yanbang
name: Wang, Jianguo
name: Li, Pan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Databases (cs.DB)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Subgraph-based graph representation learning (SGRL) has been recently proposed to deal with some fundamental challenges encountered by canonical graph neural networks (GNNs), and has demonstrated advantages in many important data science applications such as link, relation and motif prediction. However, current SGRL approaches suffer from scalability issues since they require extracting subgraphs for each training or test query. Recent solutions that scale up canonical GNNs may not apply to SGRL. Here, we propose a novel framework SUREL for scalable SGRL by co-designing the learning algorithm and its system support. SUREL adopts walk-based decomposition of subgraphs and reuses the walks to form subgraphs, which substantially reduces the redundancy of subgraph extraction and supports parallel computation. Experiments over six homogeneous, heterogeneous and higher-order graphs with millions of nodes and edges demonstrate the effectiveness and scalability of SUREL. In particular, compared to SGRL baselines, SUREL achieves 10$\times$ speed-up with comparable or even better prediction performance; while compared to canonical GNNs, SUREL achieves 50% prediction accuracy improvement.
description: This is an extended version of the full paper to appear in PVLDB 15.11(VLDB 2022)
Integration of Schools and Community Infrastructure: A Network Analysis
Creators: name: Miles, Natalie
Publisher: name: University of Melbourne
Year: 2020
Subjects: Architectural design
Community planning
Urban design

description: This paper presents a literature review and preliminary research design addressing the key research question: What are the roles of schools within a community infrastructure network? The research explores the integration of school and community infrastructure, investigating the boundaries and connections between different forms and providers of social infrastructure. Historically, opposing school design objectives of connection and security have challenged the development of schools as community hubs, whereby the use of school facilities by the wider community has often been poorly planned and/or resolved in practice. This research proposes a networked approach to understanding social infrastructure, including schools and a range of community-focussed facilities, to explore existing and potential connections between facilities and their users.
Stable implementation of adaptive IGABEM in 2D in MATLAB
Creators: name: Gantner, Gregor
name: Praetorius, Dirk
name: Schimanko, Stefan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We report on our MATLAB program package IGABEM2D, which provides an easily accessible implementation of adaptive Galerkin boundary element methods in the frame of isogeometric analysis.
Rear Vision: Lessons from Community Education in the '80s - Melbourne, Victoria and Flint, Michigan
Creators: name: BRENNAN, MARTIN
Publisher: name: University of Melbourne
Year: 2020
Subjects: Community planning
Other education not elsewhere classified

description: This paper presents an historical framework of community education concepts with roots in Flint, Michigan (USA) and an early Melbourne, Victoria (Australia) example of a school as a community hub: the Princes Hill School Park Centre. The writer’s reflective narrative reveals experience of a rich history of interaction between schools, communities, and local government, all fostering place-based neighbourhood decision making. It demonstrates the radical moves that were made to expand the concept of community education, from community use of school facilities to community empowerment and resilience. In the context of reviewing the current largely untapped potential of schools as community hubs, the term ‘Rear Vision’ emerged, reflecting a sense of ‘looking back to look forward’. The experience of community education in the 1980s in Michigan and Melbourne, Victoria, can inform how ‘schools as community hubs’ embraced the building of new connections. In the 1980s, the Princes Hill School Park Centre adopted a community empowerment model reflecting the need to move beyond the use of school facilities and instead radically engage the school, local community and the local government in a range of activities that promoted and facilitated participatory decision-making. The history of the community education movement provides evidence that broadening the role of schools beyond the use of their facilities can build connections, resilience and participatory decision-making in a post pandemic and increasingly fractured world.
Spherical accretion of collisional gas in modified gravity I: self-similar solutions and a new cosmological hydrodynamical code
Creators: name: Zhang, Han
name: Weinzierl, Tobias
name: Schulz, Holger
name: Li, Baojiu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The spherical collapse scenario has great importance in cosmology since it captures several crucial aspects of structure formation. The presence of self-similar solutions in the Einstein-de Sitter (EdS) model greatly simplifies its analysis, making it a powerful tool to gain valuable insights into the real and more complicated physical processes involved in galaxy formation. While there has been a large body of research to incorporate various additional physical processes into spherical collapse, the effect of modified gravity (MG) models, which are popular alternatives to the $ΛCDM$ paradigm to explain the cosmic acceleration, is still not well understood in this scenario. In this paper, we study the spherical accretion of collisional gas in a particular MG model, which is a rare case that also admits self-similar solutions. The model displays interesting behaviours caused by the enhanced gravity and a screening mechanism. Despite the strong effects of MG, we find that its self-similar solution agrees well with that of the EdS model. These results are used to assess a new cosmological hydrodynamical code for spherical collapse simulations introduced here, which is based on the hyperbolic partial differential equation engine ExaHyPE 2. Its good agreement with the theoretical predictions confirms the reliability of this code in modelling astrophysical processes in spherical collapse. We will use this code to study the evolution of gas in more realistic MG models in future work.
description: 20 pages, 13 figures
Solar cycle 25 prediction using length-to-amplitude relations
Creators: name: Ivanov, Vladimir G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We propose a simple method for prediction of the 11-year solar cycle maximum that is based on two relations. One of them is well known Waldmeier's rule that binds the amplitude of a cycle and the length of its ascending phase. The second rule relates the length of a given cycle from minimum to minimum and the amplitude of the next one. Using corresponding linear regressions we obtain for the amplitide of cycle 25 in the scale of 13-month smoothed monthly total revised sunspot number ${\rm SN}_{\rm max}(25) = 181\pm46$ and for the moment of the maximum $T_{\rm max}(25) = 2024.2\pm1.0$. Therefore, according to the prediction, cycle 25 will be higher than the previous one (${\rm SN}_{\rm max}(24) = 116$) with probability 0.92.
description: 7 pages, 6 figures; submitted to Solar Physics
Lectura y Bibliotecas. Entrevista a César Augusto Castro Aliaga, Director de Achikyay, Centro de Investigaciones y Promoción de la Lectura
Creators: name: Quispe-Farfán, Gabriela A.
Publisher: name: Zenodo
Year: 2022
Subjects: César Augusto Castro Aliaga
promoción de la lectura
lectura
bibliotecas
bibliotecas públicas
Achikyay
Junín
Perú

description: El nombre de César Augusto Castro Aliaga constituye una referencia imprescindible en diversos estudios bibliotecológicos, sobre todo cuando se habla de la labor de las bibliotecas públicas y el fomento de la lectura en el Perú. Cuenta con una larga trayectoria de más de 50 años, con una vasta experiencia en la labor bibliotecaria desde la Biblioteca Nacional del Perú hasta dirigir la Asociación Achikyay en Chupaca (Junín, Perú) donde promueve y desarrolla proyectos de investigación y de promoción de lectura. En esta entrevista, el Dr. César Castro nos habla sobre los inicios de Achikyay y su experiencia como bibliotecario promotor de la lectura, asimismo, da opiniones sobre la situación de la lectura en su región y de cómo Internet han influenciado en el hábito lector. Por ello, nos detalla cómo Achikyay ha desarrollado estrategias y acciones en la región Junín. Además, comenta la problemática de las bibliotecas públicas en el país y expresa la necesidad de integrar asignaturas sobre promoción de lectura como tema transversal de la malla curricular en las escuelas profesionales del ámbito bibliotecológico.