cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
High-Resolution Transmission Spectroscopy of the Terrestrial Exoplanet GJ 486b
Creators: name: Ridden-Harper, Andrew
name: Nugroho, Stevanus
name: Flagg, Laura
name: Jayawardhana, Ray
name: Turner, Jake D.
name: de Mooij, Ernst
name: MacDonald, Ryan
name: Deibert, Emily
name: Tamura, Motohide
name: Kotani, Takayuki
name: Hirano, Teruyuki
name: Kuzuhara, Masayuki
name: Omiya, Masashi
name: Kusakabe, Nobuhiko
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Terrestrial exoplanets orbiting M-dwarf stars are promising targets for transmission spectroscopy with existing or near-future instrumentation. The atmospheric composition of such rocky planets remains an open question, especially given the high X-ray and ultraviolet flux from their host M dwarfs that can drive atmospheric escape. The 1.3 $R_\oplus$ exoplanet GJ 486b ($T_{\rm{eq}} \sim$ 700 K), orbiting an M3.5 star, is expected to have one of the strongest transmission spectroscopy signals among known terrestrial exoplanets. We observed three transits of GJ 486b using three different high-resolution spectrographs: IRD on Subaru, IGRINS on Gemini-South, and SPIRou on the Canada-France-Hawai'i Telescope. We searched for atmospheric absorption from a wide variety of molecular species via the cross-correlation method, but did not detect any robust atmospheric signals. Nevertheless, our observations are sufficiently sensitive to rule out several clear atmospheric scenarios via injection and recovery tests, and extend comparative exoplanetology into the terrestrial regime. Our results suggest that GJ 486b does not possess a clear H$_2$/He-dominated atmosphere, nor a clear 100% water-vapor atmosphere. Other secondary atmospheres with high mean molecular weights or H$_2$/He-dominated atmospheres with clouds remain possible. Our findings provide further evidence suggesting that terrestrial planets orbiting M-dwarf stars may experience significant atmospheric loss.
description: Accepted for publication in AJ
Testing black holes in non-linear electrodynamics from the observed quasi-periodic oscillations
Creators: name: Banerjee, Indrani
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Quasi-periodic oscillations (QPOs), in particular, the ones with high frequencies, often observed in the power spectrum of black holes, are useful in understanding the nature of strong gravity since they are associated with the motion of matter in the vicinity of the black hole horizon. Interestingly, these high frequency QPOs (HFQPOs) are observed in commensurable pairs, the most common ratio being 3:2. Several theoretical models are proposed in the literature which explain the HFQPOs in terms of the orbital and epicyclic frequencies of matter rotating around the central object. Since these frequencies are sensitive to the background spacetime, the observed HFQPOs can potentially extract useful information regarding the nature of the same. In this work, we investigate the role of regular black holes with a Minkowski core, which arise in gravity coupled to non-linear electrodynamics, in explaining the HFQPOs. Regular black holes are particularly interesting as they provide a possible resolution to the singularity problem in general relativity. We compare the model dependent QPO frequencies with the available observations of the quasi-periodic oscillations from black hole sources and perform a \c{hi} 2 analysis. Our study reveals that most QPO models favor small but non-trivial values of the non-linear electrodynamics charge parameter. In particular, black holes with large values of non-linear electrodynamics charge parameter are generically disfavored by present observations related to QPOs.
description: 24 pages, 2 figures, 4 tables. arXiv admin note: text overlap with arXiv:2201.00679
title: Evaluation des facteurs de risque de l'état confusionnel aigu à domicile
title: une étude rétrospective dans un centre médicosocial régional en Suisse romande
titleType: Subtitle
Creators: name: Decarli, Delphine
name: Reymond, Anne-Sophie
Publisher: name: Unknown
Year: 0
Subjects: subject: état confusionnel aigu
subject: santé mentale
subject: psychiatrie
subject: personne âgée
subject: accompagnement

description: Ce travail de bachelor traite de la détection des facteurs de risque de l’ECA1 chez la personne âgée ayant été hospitalisée et bénéficiant du CMS2. L’ECA est le trouble cognitif aigu le plus important chez la personne âgée. Il est défini comme un syndrome cérébral organique avec une étiologie multifactorielle, caractérisé par la présence simultanée de perturbations de la conscience et de l’attention, de la perception, de l’idéation, de la mémoire, du comportement psychomoteur, des émotions et du rythme veille-sommeil.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
title: Adolescents diabétiques type 1
title: prise d'autonomie et observance au traitement
titleType: Subtitle
Creators: name: De Kaenel, Diane
name: Ducry, Aurélien
Publisher: name: Unknown
Year: 0
Subjects: subject: enfant
subject: adolescent
subject: diabète
subject: diabète type 1
subject: traitement
subject: autonomie
subject: accompagnement
subject: rôle infirmier
subject: éducation thérapeutique
subject: famille

description: Un enfant diabétique type 1 partage la responsabilité de son traitement avec ses parents. Cependant, à l’âge adulte, il devra gérer seul sa maladie. L’adolescence représente donc une étape cruciale pour lui et ses parents. Avec tous les bouleversements liés à cette période de vie, il doit en plus apprendre à devenir indépendant. À quel point les parents doivent-ils s’investir ou accorder de l’autonomie à leur enfant afin qu’il s’épanouisse, s’il risque une péjoration de son équilibre glycémique ?
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Masked areas in shear peak statistics: a forward modeling approach
Creators: name: Bard, Deborah
name: Kratochvil, Jan M.
name: Dawson, William
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The statistics of shear peaks have been shown to provide valuable cosmological information beyond the power spectrum, and will be an important constraint of models of cosmology with the large survey areas provided by forthcoming astronomical surveys. Surveys include masked areas due to bright stars, bad pixels etc, which must be accounted for in producing constraints on cosmology from shear maps. We advocate a forward-modeling approach, where the impact of masking (and other survey artifacts) are accounted for in the theoretical prediction of cosmological parameters, rather than removed from survey data. We use masks based on the Deep Lens Survey, and explore the impact of up to 37% of the survey area being masked on LSST and DES-scale surveys. By reconstructing maps of aperture mass, the masking effect is smoothed out, resulting in up to 14% smaller statistical uncertainties compared to simply reducing the survey area by the masked area. We show that, even in the presence of large survey masks, the bias in cosmological parameter estimation produced in the forward-modeling process is ~1%, dominated by bias caused by limited simulation volume. We also explore how this potential bias scales with survey area and find that small survey areas are more significantly impacted by the differences in cosmological structure in the data and simulated volumes, due to cosmic variance.
description: 10 pages, 8 figures, submitted ApJ
Farmer-friendly delivery of veterinary services: Experimental insights from the Kenyan dairy sector
Creators: name: Maina, Kevin W.
name: Parlasca, Martin C.
name: Rao, Elizaphan J.O.
name: Qaim, Matin
Publisher: name: Unknown
Year: 2023
Subjects: subject: Farm Management
subject: Livestock Production/Industries
subject: cooperatives
subject: dairying
subject: animal health
subject: ECF

description: Poor health conditions of livestock cause sizeable losses for many farmers in the Global South. Veterinary services, including vaccinations, could help but often fail to reach farmers under typical smallholder conditions. Here, we examine how the provision of a vaccine against East Cost Fever (ECF) – a tick-borne disease affecting cattle in Africa – can be designed to reduce typical adoption barriers. Using data from a choice experiment with dairy farmers in Kenya, we evaluate farmers’ preferences and willingness to pay for various institutional innovations in vaccine delivery, such as a stronger role of dairy cooperatives, new payment modalities with a check-off system, vaccination at farmers’ homestead, and bundling vaccinations with discounts for livestock insurance. Our data reveal that farmers’ awareness of the ECF vaccine is limited and adoption rates are low, largely due to institutional constraints. Results from mixed logit and latent class models suggest that suitable institutional innovations – tailored to farmers’ heterogeneous conditions – could significantly increase adoption. This general finding likely also holds for other veterinary technologies and services in the Global South.
Physical conditions for dust grain alignment in Class 0 protostellar cores I. Observations of dust polarization and molecular irradiation tracers
Creators: name: Gouellec, Valentin J. M. Le
name: Maury, Anaëlle J.
name: Hull, Charles L. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: High angular resolution observations of Class 0 protostars have produced detailed maps of the polarized dust emission in the envelopes of these young embedded objects. Interestingly, the improved sensitivity brought by ALMA has revealed wide dynamic ranges of polarization fractions, with specific locations harboring surprisingly large amounts of polarized dust emission. Our aim is to characterize the grain alignment conditions and dust properties responsible for the observed polarized dust emission in the inner envelopes (~1000 au) of Class 0 protostars. We analyzed the polarized dust emission maps obtained with ALMA and compared them to molecular line emission maps of specific molecular tracers, mainly CCH, which allowed us to probe one of the key components in dust grain alignment theories: the irradiation field. We show that CCH peaks toward outflow cavity walls, where the polarized dust emission is also enhanced. Our analysis provides a tentative correlation between the morphology of the polarized intensity and CCH emission, suggesting that the radiation field impinging on the cavity walls favors both the grain alignment and the warm carbon chain chemistry in these regions. We propose that shocks happening along outflow cavity walls could potentially represent an additional source of photons contributing to dust grain alignment. However, some parts of the cores, such as the equatorial planes, exhibit enhanced polarized flux, although no radiation driven chemistry is observed, for example where radiative torques are theoretically not efficient enough. This suggests that additional physical conditions, such as source geometry and dust grain evolution, may play a role in grain alignment.
Relation between spectra of Narain CFTs and properties of associated boolean functions
Creators: name: Furuta, Yuma
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Information Theory (cs.IT)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 81T35

description: Recently, the construction of Narain CFT from a certain class of quantum error correcting codes has been discovered. In particular, the spectral gap of Narain CFT corresponds to the binary distance of the code, not the genuine Hamming distance. In this paper, we show that the binary distance is identical to the so-called EPC distance of the boolean function uniquely associated with the quantum code. Therefore, seeking Narain CFT with high spectral gap is equivalent to getting a boolean function with high EPC distance. Furthermore, this problem can be addressed by finding lower Peak-to-Average Power ratio (PAR) with respect to the binary truth table of the boolean function. Though this is neither sufficient nor necessary condition for high EPC distance, we construct some examples of relatively high EPC distances referring to the constructions for lower PAR. We also see that codes with high distance are related to induced graphs with low independence numbers.
description: 27 pages, 1 figure
title: Les interprètes membre de la famille
title: une solution low-cost ?
titleType: Subtitle
Creators: name: Corazza, Tiffany
name: Martin, Eve
Publisher: name: Unknown
Year: 0
Subjects: subject: interprète
subject: situation de soins
subject: famille
subject: interculturalité
subject: qualité des soins

description: Le but de notre revue de littérature est de mettre en lumière des situations de soins, dans lesquelles les infirmières peuvent choisir d’avoir recours à des interprètes familiaux sans que cela péjore la qualité des soins.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Learning the Dynamics of Autonomous Linear Systems From Multiple Trajectories
Creators: name: Xin, Lei
name: Chiu, George
name: Sundaram, Shreyas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: Dynamical Systems (math.DS)
subject: Machine Learning (stat.ML)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We consider the problem of learning the dynamics of autonomous linear systems (i.e., systems that are not affected by external control inputs) from observations of multiple trajectories of those systems, with finite sample guarantees. Existing results on learning rate and consistency of autonomous linear system identification rely on observations of steady state behaviors from a single long trajectory, and are not applicable to unstable systems. In contrast, we consider the scenario of learning system dynamics based on multiple short trajectories, where there are no easily observed steady state behaviors. We provide a finite sample analysis, which shows that the dynamics can be learned at a rate $\mathcal{O}(\frac{1}{\sqrt{N}})$ for both stable and unstable systems, where $N$ is the number of trajectories, when the initial state of the system has zero mean (which is a common assumption in the existing literature). We further generalize our result to the case where the initial state has non-zero mean. We show that one can adjust the length of the trajectories to achieve a learning rate of $\mathcal{O}(\sqrt{\frac{\log{N}}{N})}$ for strictly stable systems and a learning rate of $\mathcal{O}(\frac{(\log{N})^d}{\sqrt{N}})$ for marginally stable systems, where $d$ is some constant.
description: 8 pages, 2022 American Control Conference (ACC)
title: Infarctus du myocarde en milieu aigu
title: perspectives d'éducation thérapeutique
titleType: Subtitle
Creators: name: Claivaz, Virginie
name: Fieni, Stefania
Publisher: name: Unknown
Year: 0
Subjects: subject: infarctus
subject: myocarde
subject: cardiologie
subject: soins aigüs
subject: éducation thérapeutique
subject: rôle infirmier

description: En étant la principale cause de mortalité en Suisse, les maladies cardiovasculaires représentent un problème majeur de santé publique. De plus, les personnes ayant eu un infarctus du myocarde (IDM) ont un risque de récidives important. Afin d’améliorer la prise en charge de ces patients, la prévention et l’amélioration des connaissances jouent un rôle fondamental. L’éducation thérapeutique du patient (ETP) représente un des moyens pour favoriser l’autonomisation du patient en le rendant acteur dans la gestion de sa santé. A ce titre, les infirmières occupent une place stratégique dans l’équipe pluridisciplinaire. Toutefois, malgré l’existence de nombreuses recommandations, elles ont tendance à sous-évaluer les besoins des patients et à ne pas se coordonner dans la mise en place des interventions éducatives au cours de l’hospitalisation. Ceci explique en partie le fait qu’à leur sortie, les patients se plaignent de disposer d’une quantité insuffisante d’informations en lien avec leur problème de santé et par conséquent à avoir des difficultés à modifier leur style de vie.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Late Time Cosmological Evolution in f(R) theories with Ordinary and Collisional Matter
Creators: name: Oikonomou, V. K.
name: Karagiannakis, N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the late time cosmological evolution of $f(R)$ theories of modified gravity, with the matter content of the universe being that of collisional self interacting matter. We assume that the universe is described by a flat Friedmann-Lemaitre-Robertson-Walker metric and that it is matter and dark energy dominated. The results of our numerical analysis for a collisional matter $f(R)$ theory are compared with those resulting from pressure-less matter $f(R)$ theory and from the $\mathrmΛ\mathrm{CDM}$ model. As we shall demonstrate, the resulting picture can vary from model to model, indicating that the effect of collisional matter in $f(R)$ theories is strongly model dependent. Particularly, in a few cases, may give better fit to the $\mathrmΛ\mathrm{CDM}$ model. In all studied cases, the effective equation of state parameter does not cross the phantom divide, both in the collisional matter and pressure-less matter $f(R)$ theories. Finally, we thoroughly study the effects of collisional matter on one of the $f(R)$ models that is known to provide a unified description of early time inflation and late time acceleration. The overall picture of the evolution of the universe is not drastically affected, apart from the matter era which is further enhanced with an additional matter energy density term, which is of leading order. However, a fully consistent description of the universe's evolution requires the introduction of a dark energy compensate in the total energy density, a concept very well known from the literature.
Learning Spatiotemporal Chaos Using Next-Generation Reservoir Computing
Creators: name: Barbosa, Wendson A. S.
name: Gauthier, Daniel J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Forecasting the behavior of high-dimensional dynamical systems using machine learning requires efficient methods to learn the underlying physical model. We demonstrate spatiotemporal chaos prediction using a machine learning architecture that, when combined with a next-generation reservoir computer, displays state-of-the-art performance with a computational time $10^3-10^4$ times faster for training process and training data set $\sim 10^2$ times smaller than other machine learning algorithms. We also take advantage of the translational symmetry of the model to further reduce the computational cost and training data, each by a factor of $\sim$10.
description: 11 pages, 10 figures
L'espoir en fin de vie ou l'espoir de vivre jusqu'à la fin ?
Creators: name: Chollet, Johanne
name: Müller, Thierry
Publisher: name: Unknown
Year: 0
Subjects: subject: soins palliatifs
subject: espoir
subject: fin de vie
subject: mort
subject: rôle infirmier

description: L'objectif est d'identifier les stratégies et interventions infirmières qui renforcent l’espoir des patients dont la maladie est au stade terminal, dans un contexte de soins palliatifs.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Generalized chronotaxic systems: time-dependent oscillatory dynamics stable under continuous perturbation
Creators: name: Suprunenko, Yevhen F.
name: Stefanovska, Aneta
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Chronotaxic systems represent deterministic nonautonomous oscillatory systems which are capable of resisting continuous external perturbations while having a complex time-dependent dynamics. Until their recent introduction in \emph{Phys. Rev. Lett.} \textbf{111}, 024101 (2013) chronotaxic systems had often been treated as stochastic, inappropriately, and the deterministic component had been ignored. While the previous work addressed the case of the decoupled amplitude and phase dynamics, in this paper we develop a generalized theory of chronotaxic systems where such decoupling is not required. The theory presented is based on the concept of a time-dependent point attractor or a driven steady state and on the contraction theory of dynamical systems. This simplifies the analysis of chronotaxic systems and makes possible the identification of chronotaxic systems with time-varying parameters. All types of chronotaxic dynamics are classified and their properties are discussed using the nonautonomous Poincaré oscillator as an example. We demonstrate that these types differ in their transient dynamics towards a driven steady state and according to their response to external perturbations. Various possible realizations of chronotaxic systems are discussed, including systems with temporal chronotaxicity and interacting chronotaxic systems.
description: 9 pages, 8 figures
Electron-phonon interaction and phonons in 2d doped semiconductors
Creators: name: Macheda, Francesco
name: Sohier, Thibault
name: Barone, Paolo
name: Mauri, Francesco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Electron-phonon interaction and phonon frequencies of doped polar semiconductors are sensitive to long-range Coulomb forces and can be strongly affected by screening effects of free carriers, the latter changing significantly when approaching the two-dimensional limit. We tackle this problem within a linear-response dielectric-matrix formalism, where screening effects can be properly taken into account by generalized effective charge functions and the inverse scalar dielectric function, allowing for controlled approximations in relevant limits. We propose complementary computational methods to evaluate from first principles both effective charges -- encompassing all multipolar components beyond dynamical dipoles and quadrupoles -- and the static dielectric function of doped two-dimensional semiconductors, and provide analytical expressions for the long-range part of the dynamical matrix and the electron-phonon interaction in the long-wavelength limit. As a representative example, we apply our approach to study the impact of doping in disproportionated graphene, showing that optical Fröhlich and acoustic piezoelectric couplings, as well as the slope of optical longitudinal modes, are strongly reduced, with a potential impact on the electronic/intrinsic scattering rates and related transport properties.
description: 28 pages, 11 figures
People living with HIV who inject or have injected non-prescription drugs: Evidence of substantial differences in health inequalities and experiences of clinical care
Creators: name: Norman, Thomas
name: Power, Jennifer
name: Clifton, Brent
name: Murray, Joel
name: Bourne, Adam
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 42
subject: Health sciences
subject: FOS: Health sciences
classificationCode: 52
subject: Psychology
subject: FOS: Psychology
classificationCode: 44
subject: Human society

description: Introduction: This study investigates differences in health and well-being associated with current, past or no injecting drug use (IDU) among people living with HIV (PLHIV) in Australia, identifying key health care considerations between injecting experiences. Methods: Data were extracted from the HIV Futures 9 study; a survey of PLHIV conducted in 2018–2019. Chi-square and analysis of variance analyses compared clinical and treatment characteristics, major physical and mental comorbidities, sexually transmitted infection diagnoses, and quality of life for those who reported current (last 12 months), past (12+ months ago) or no IDU. Results: Current IDU (n = 106) was associated with higher rates of sexually transmitted infection testing and diagnoses, higher frequency of self-reported antiretroviral therapy non-adherence due to drug use and greater social quality of life than past (n = 126) or no IDU (n = 508; total N = 740). Past and current IDUs were associated with more mental illness diagnoses and self-reported concern about drug use. Past IDU was associated with more physical comorbidities, lower satisfaction with clinical care and greater difficulty in affording health care than current or no IDU. Discussion and Conclusions: Past and current IDUs are associated with unique health concerns. However, past IDU appears to be related to greater dissatisfaction in navigating health care than individuals with current IDU experience. Higher social connection and the types of services being accessed by individuals who currently inject may play a role in shaping service satisfaction. Peer-based interventions to help support individuals in accessing services that are affirming of their needs is an ongoing priority.
Rôle infirmier auprès des parents d'un enfant atteint de cancer
Creators: name: Challet, Laure
name: Lüthi, Camille
Publisher: name: Unknown
Year: 0
Subjects: subject: cancer
subject: enfant
subject: accompagnement
subject: rôle infirmier
subject: parents

description: L’objet de notre revue de littérature porte sur le rôle infirmier auprès des parents d’un enfant atteint de cancer. Dans une perspective de soins à la famille, nous nous sommes interrogées sur les besoins spécifiques des parents d’un enfant atteint de cancer. Nous voulions également établir un lien avec les approches complémentaires et leurs réponses possibles à certains besoins des parents.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Comportements de recherche de sécurité et hallucinations auditives verbales dans la schizophrénie
Creators: name: Chaix, Joséphine
name: Ma, Edgar
Publisher: name: Unknown
Year: 0
Subjects: subject: schizophrénie
subject: santé mentale
subject: psychiatrie
subject: hallucinations auditives
subject: voix
subject: rôle infirmier

description: Les hallucinations auditives verbales peuvent avoir un fort impact sur le fonctionnement social et professionnel des personnes avec un diagnostic de schizophrénie. Les comportements de recherche de sécurité utilisés pour réduire la menace associée aux voix jouent un rôle important pour expliquer les conséquences fonctionnelles des hallucinations auditives. Toutefois, les comportements de recherche de sécurité ont peu été étudiés.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Detecting Boosted Dark Matter from the Sun with Large Volume Neutrino Detectors
Creators: name: Berger, Joshua
name: Cui, Yanou
name: Zhao, Yue
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study novel scenarios where thermal dark matter (DM) can be efficiently captured in the Sun and annihilate into boosted dark matter. In models with semi-annihilating DM, where DM has a non-minimal stabilization symmetry, or in models with a multi-component DM sector, annihilations of DM can give rise to stable dark sector particles with moderate Lorentz boosts. We investigate both of these possibilities, presenting concrete models as proofs of concept. Both scenarios can yield viable thermal relic DM with masses O(1)-O(100) GeV. Taking advantage of the energetic proton recoils that arise when the boosted DM scatters off matter, we propose a detection strategy which uses large volume terrestrial detectors, such as those designed to detect neutrinos or proton decays. In particular, we propose a search for proton tracks pointing towards the Sun. We focus on signals at Cherenkov-radiation-based detectors such as Super-Kamiokande (SK) and its upgrade Hyper-Kamiokande (HK). We find that with spin-dependent scattering as the dominant DM-nucleus interaction at low energies, boosted DM can leave detectable signals at SK or HK, with sensitivity comparable to DM direct detection experiments while being consistent with current constraints. Our study provides a new search path for DM sectors with non-minimal structure.
description: 19 pages, 3 figures. Typos corrected, some rewording, results unchanged
Cellular osmotica of plants in relation to sediment nitrogen and salt content in mangroves and saltmarshes at Western Port, Victoria
Creators: name: Cain, Stephen
name: Boon, Paul I
Publisher: name: La Trobe
Year: 2023

description: Murray-Darling Freshwater Research Centre

MDFRC item.

Sediments from mangrove and saltmarsh areas at Yaringa, Western Port contained high concentrations of chloride (c. 330-2100 mmol per litre of interstitial water) and sodium (c. 320-1900 mmol 1-1). The concentrations recorded during the study were highest in March and lowest in July-August; salinity in the marsh during summer was considerably higher than that commonly reported for saltmarshes in other parts of the world. Sediment ammonium contents (c. 180-580 nmol per cm3 of fresh sediment) were variable across the marsh and throughout the sampling period, with there being little overall pattern to these changes. In contrast, concentrations of nitrate plus nitrite were low (< 100 nmol cm3) for most of the year except for a period in March when they were extremely high (c. 1100-1800 nmol cm-3). The leaf-cell sap of all saltmarsh and mangrove plants contained high concentrations of chloride (c. 300-1200 mmol per litre of cell sap), sodium (c. 280-900 mmol l-1) and potassium (c. 40-200 mmol l-1). Glycinebetaine was accumulated in the leaf-cell sap to concentrations of up to about 90 mmol l-1 by Atriplex paludosa, Avicennia marina, Sarcocornia quinqueflora, Sclerostegia arbuscula and Suaeda australis. Proline and glycinebetaine were accumulated by Limonium australe, Samolus repens, Selliera radicans and Triglochin striata, but no species accumulated proline alone. Concentrations of inorganic osmotica in the foliage were generally highest in March, whereas glycinebetaine and proline were at their most concentrated in April. No significant relationship was detected between concentrations of organic osmotica in the plants and that of salt or inorganic nitrogen in the sediments.
L'accompagnement infirmier de la fratrie en néonatologie
Creators: name: Cachin, Déborah
name: Erard, Audrey
Publisher: name: Unknown
Year: 0
Subjects: subject: néonatologie
subject: nouveau-né
subject: accompagnement
subject: rôle infirmier
subject: fratrie
subject: famille

description: Dans ce travail de Bachelor, nous nous sommes intéressées aux fratries des nouveau-nés hospitalisés en néonatologie. La naissance d’un puîné est un élément perturbateur dans la vie d’un enfant. Elle l’est d’autant plus lorsque le nouveau-né est à risque et entraîne de nombreuses répercussions sur le développement des fratries.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Investigation of bi-particle states in gate-array-controlled quantum-dot systems aided by machine learning techniques
Creators: name: Nemnes, G. A.
name: Mitran, T. L.
name: Preda, A. T.
name: Ghiu, I.
name: Marciu, M.
name: Manolescu, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum computing architectures require an accurate and efficient description in terms of many-electron states. Recent implementations include quantum dot arrays, where the ground state of a multi q-bit system can be altered by voltages applied to the top gates. An extensive investigation concerning the spectra of the many-electron systems under multiple operation conditions set by external voltages typically requires a relatively large number of Hamiltonian diagonalizations, where the Coulomb interaction is considered in an exact manner. Instead of making exhaustive calculations using high throughput computing, we approach this problem by augmenting numerical diagonalizations with machine learning techniques designed to predict the many-electron eigenvalues and eigenfunctions. To this end, we employ and compare the results from linear regression methods such as multivariate least squares (MLS) as well as non-linear techniques based on kernel ridge regression (KRR), Gaussian process regression (GPR) and artificial neural networks (ANNs). The input feature vectors are assembled from readily available information comprised from a binary representation of the potential and the strength of the Coulomb interaction. Furthermore, employing a linear classifier, we establish a rule for detecting a singlet-triplet transition which may arise for certain potential configurations.
description: 15 pages, 6 figures
Weyl Curvature Evolution System for GR
Creators: name: Krasnov, Kirill
name: Shaw, Adam
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Starting from the chiral first-order pure connection formulation of General Relativity, we put the field equations of GR in a strikingly simple evolution system form. The two dynamical fields are a complex symmetric tracefree 3x3 matrix Psi, which encodes the self-dual part of the Weyl curvature tensor, as well as a spatial SO(3,C) connection A. The right-hand sides of the evolution equations also contain the triad for the spatial metric, and this is constructed non-linearly from the field Psi and the curvature of the spatial connection A. The evolution equations for this pair are first order in both time and spatial derivatives, and so simple that they could have been guessed without a computation. They are also the most natural generalisations of the equations one obtains in the case of the chiral description of Maxwell's theory. We also determine the modifications of the evolution system needed to enforce the "constraint sweeping", so that any possible numerical violation of the constraints present becomes propagating and gets removed from the computational grid.
description: 15 pages, no figures
Action-based online modules
Creators: name: Pearce, BinBin
name: Djinlev, Vanja
Publisher: name: Zenodo
Year: 2022
Subjects: transdisciplinary learning
energy citizenship
decarbonization
energy transition
design thinking
systems thinking

description: The ENCLUDE Academy for Energy Citizen Leadership is a six-month, online leadership development and civic engagement program for decarbonization. It brings together current and future changemakers from across Europe, Africa and Canada to help them hone their individual leadership, their collective organization skills and to connect them to one another and to experts in the energy transition. It aims to help people who are interested in making a change in their own communities, to not only reduce carbon emissions, but also to link up issues related to the energy transition with improving the overall well-being of their communities. It is for people who want to realize concrete ideas they already have related to the energy transition, and for those who would like to become more active in this area and to start finding that idea. This deliverable sets out to describe the objectives, rationale, structure and activities of the program. In addition, it offers an initial view of the video materials, in the form of the script that will be used, as input for the plenary sessions of the program. These videos serve as only one of many components for supporting learning during the ENCLUDE Academy, in addition to group discussions, implementation of ideas within communities and mentoring sessions with local experts. However, the videos offer a concrete view into the themes and the specific knowledge that will be shared during the course of the program. The ENCLUDE Academy bridges academic knowledge and useable knowledge for the citizens who are ready to be change agents for the energy transition. This transdisciplinary approach to social learning goes beyond informing the public of information that they were previously unaware of, but also asks participants to share their own expertise on related topics. It also provides them with time, structure and means to contextualize this knowledge and perspectives. Key for the design of the Academy is the recognition of heterogeneity in energy needs and in the circumstances in which citizens live and work. In order to create knowledge that is usable and that can contribute to systemic transformation, it is important to design a two-way process where citizens help us contextualize this knowledge. The ENCLUDE Academy aims to have an impact by creating and using this mode of engagement for catalyzing change.
Hot Ammonia around O-type Young Stars. I. JVLA imaging of Ammonia (6,6) to (14,14) in NGC7538 IRS1
Creators: name: Goddi, Ciriaco
name: Zhang, Qizhou
name: Moscadelli, Luca
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: To constrain theoretical models of high-mass star formation, observational signatures of mass accretion in O-type forming stars are desirable. Using the JVLA, we have mapped the hot and dense molecular gas in the hot core NGC7538 IRS1, with 0.2'' angular resolution, in seven metastable (J=K) inversion transitions of ammonia: (J,K)=(6,6), (7,7), (9,9), (10,10), (12,12), (13,13), and (14,14). These lines arise from energy levels between ~400 K and ~1950 K above the ground state, and are observed in absorption against the HC-HII region associated with NGC7538 IRS1. With a 500 AU linear resolution, we resolve the elongated North-South ammonia structure into two compact components: the main core and a southernmost component. Previous observations of the radio continuum with a 0.08'' (or 200 AU) resolution, resolved in turn the compact core in two (northern and southern) components. These features correspond to a triple system of high-mass YSOs IRS1a, IRS1b, and IRS1c identified with VLBI measurements of methanol masers. The velocity maps of the compact core show a clear velocity gradient in all lines, which is indicative of rotation in a (circumbinary) envelope, containing ~40 solar masses (dynamical mass). In addition, we derived physical conditions of the molecular gas: rotational temperatures ~280 K, ammonia column densities ~1.4-2.5 x 10^19 cm-2, H_2 volume densities ~3.5-6.2 x 10^10 cm-3, and a total gas mass in the range of 19-34 solar masses, for the main core. We conclude that NGC7538 IRS1 is the densest hot molecular core known, containing a rotating envelope which hosts a multiple system of high-mass YSOs, possibly surrounded by accretion disks. Future JVLA observations in the A-configuration are needed to resolve the binary system in the core and may allow to study the gas kinematics in the accretion disks associated with individual binary members.
description: 16 pages, 8 figures, accepted for publication in Astronomy & Astrophysics
title: Soigner l'attente
title: quel est le rôle professionnel à l'égard de patients vivant dans l'incertitude de la transplantation ?
titleType: Subtitle
Creators: name: Breu, Corinne
name: Cavin, Mélanie
Publisher: name: Unknown
Year: 0
Subjects: subject: transplantation
subject: soins infirmiers
subject: qualité des soins
subject: psychologie
subject: patient

description: Le but de ce travail est d’explorer le vécu des patients en attente d’une transplantation. Pour ensuite proposer des pistes d’interventions infirmières permettant aux patients de s’adapter au mieux durant cette période incertaine. La question de recherche « Quel est le rôle professionnel à l’égard de patients vivant dans l’incertitude de la transplantation? » a guidé la réalisation de ce travail.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Resonant Spin Tunneling in Randomly Oriented Nanospheres of Mn$_{12}$ Acetate
Creators: name: Lendinez, S.
name: Zarzuela, R.
name: Tejada, J.
name: Terban, M. W.
name: Billinge, S. J. L.
name: Espin, J.
name: Imaz, I.
name: Maspoch, D.
name: Chudnovsky, E. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report measurements and theoretical analysis of resonant spin tunneling in randomly oriented nanospheres of a molecular magnet. Amorphous nanospheres of Mn$_{12}$ acetate have been fabricated and characterized by chemical, infrared, TEM, X-ray, and magnetic methods. Magnetic measurements have revealed sharp tunneling peaks in the field derivative of the magnetization that occur at the typical resonant field values for Mn$_{12}$ acetate. Theoretical analysis is provided that explains these observations. We argue that resonant spin tunneling in a molecular magnet can be established in a powder sample, without the need for a single crystal and without aligning the easy magnetization axes of the molecules. This is confirmed by re-analyzing the old data on a powdered sample of non-oriented micron-size crystals of Mn$_{12}$ acetate. Our findings can greatly simplify the selection of candidates for quantum spin tunneling among newly synthesized molecular magnets.
description: 8 pages, 11 figures
Cyanobacterial dominance: The role of buoyancy regulation in dynamic lake environments
Creators: name: Reynolds, Colin S
name: Oliver, Rod L
name: Walsby, Anthony E
Publisher: name: La Trobe
Year: 2023

description: Murray-Darling Freshwater Research Centre

MDFRC item.

The interactions of size, shape, and density of cyanobacteria result in a 5-order of magnitude difference in flotation or sinking rates which, in turn, influence the extent of their dispersion in turbulent water masses. Active mixing through resource-replete waters of high clarity favours fast-growing, small-celled species. Where photosynthetically active radiation is severely attenuated through the wind-mixed layer, species may rely on turbulent entrainment but must be adapted toward efficient light harvesting (morphological attenuation, enhanced pigmentation). In both strongly segregated waters (light- and nutrient-rich layers separated vertically) and waters experiencing high-frequency fluctuations in vertical mixing and optical depth, emphasis is placed on the ability to make rapid, buoyancy-adjusted vertical movements, favoured by large size. The cyanobacterial 1ife-forms respectively typical of these contrasted limnological systems — unicellular coccoids (e.g., Synechococcus), solitary filaments (e.g., Oscillatoria) and colonial forms (e.g., Microcystis) — illustrate the diversity of evolutionary adaptations to be discerned among the planktonic cyanobacteria and which contributes to their reputation as a prominent and successful group of organisms.
MPEC 2024-R355 : 2024 RP30
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 RP30

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Spectrum of the Transposition graph
Creators: name: Konstantinova, Elena V.
name: Kravchuk, Artem
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Transposition graph $T_n$ is defined as a Cayley graph over the symmetric group generated by all transpositions. It is known that all eigenvalues of $T_n$ are integers. However, an explicit description of the spectrum is unknown. In this paper we prove that for any integer $k\geqslant 0$ there exists $n_0$ such that for any $n\geqslant n_0$ and any $m \in \{0, \dots, k\}$, $m$ is an eigenvalue of $T_n$. In particular, it is proved that zero is an eigenvalue of $T_n$ for any $n\neq2$, and one is an eigenvalue of $T_n$ for any odd $n\geqslant 7$ and for any even $n \geqslant 14$. We also present exact values of the third and the fourth largest eigenvalues of $T_n$ with their multiplicities.
title: Prévention et dépistage de l'état confusionnel aigu de la personne âgée en milieu hospitalier
title: un rôle infirmier
titleType: Subtitle
Creators: name: Binetti, Raphaël
name: Perritaz, Michaël
Publisher: name: Unknown
Year: 0
Subjects: subject: confusion aigüe
subject: psychiatrie
subject: santé mentale
subject: personne âgée
subject: prévention
subject: rôle infirmier

description: Ce travail en soins infirmiers s’inscrit dans le cadre de l’obtention d’un diplôme Bachelor of Science. Il est réalisé sous forme de revue de littérature non exhaustive. Le choix de la problématique s’est porté sur la prévention et le dépistage de l’état confusionnel aigu (ECA) chez la personne âgée en milieu hospitalier. Il s’agit en effet, d’un problème fréquent, sous-estimé et avec des conséquences importantes. Dès lors, nous nous sommes intéressés à identifier le rôle infirmier ainsi que les meilleures pratiques pour faire face à ce phénomène.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Event-Horizon-Telescope Evidence for Alignment of the Black Hole in the Center of the Milky Way with the Inner Stellar Disk
Creators: name: Psaltis, Dimitrios
name: Narayan, Ramesh
name: Fish, Vincent L.
name: Broderick, Avery E.
name: Loeb, Abraham
name: Doeleman, Sheperd S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Observations of the black hole in the center of the Milky Way with the Event Horizon Telescope at 1.3 mm have revealed a size of the emitting region that is smaller than the size of the black-hole shadow. This can be reconciled with the spectral properties of the source, if the accretion flow is seen at a relatively high inclination (50-60 degrees). Such an inclination makes the angular momentum of the flow, and perhaps of the black hole, nearly aligned with the angular momenta of the orbits of stars that lie within 3 arcsec from the black hole. We discuss the implications of such an alignment for the properties of the black hole and of its accretion flow. We argue that future Event-Horizon-Telescope observations will not only refine the inclination of Sgr A* but also measure precisely its orientation on the plane of the sky.
description: To appear in the Astrophysical Journal