cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Radial distribution of the carbonaceous nano-grains in the protoplanetary disk around HD 169142
Creators: name: Devinat, Marie
name: Habart, Émilie
name: Pantin, Éric
name: Ysard, Nathalie
name: Jones, Anthony
name: Labadie, Lucas
name: Di Folco, Emmanuel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: HD 169142 is part of the class of (pre-)transitional protoplanetary disks showing multiple carbon nanodust spectroscopic signatures (aromatic, aliphatic) dominating the infrared spectrum. Precise constraints on the spatial distribution and properties of carbonaceous dust particles are essential to understanding the physics of the disk. The HD 169142 disk is seen almost face-on and thus offers a unique opportunity to study the dust radial evolution. We investigate the spatial distribution and properties of the carriers of several dust aromatic emission features in the disk across a broad spatial range (10-200 AU). We analysed imaging and spectroscopic observations in the 8-12 microns range from VLT/VISIR, as well as adaptive optics spectroscopic observations in the 3-4 microns range from VLT/NACO. The data probes the spatial evolution of the 3.3, 8.6, and 11.3 microns aromatic bands. To constrain the radial distribution of carbonaceous nano-grains, the observations were compared to models using The Heterogeneous dust Evolution Model for Interstellar Solids (THEMIS), integrated into the POLARIS radiative transfer code by calculating the thermal and stochastic heating of sub-micrometer dust grains. Our data show predominant nano-particle emission at all radii (resolution of about 0.1", 12 AU at 3 microns and 0.3", 35 AU at 10 microns) in the HD 169142 disk. This unambiguously shows that carbonaceous nano-grains dominate radiatively the infrared spectrum in most of the disk, as suggested by previous studies. In order to account for both VISIR and NACO emission maps, we show the need for aromatic particles distributed within the disk from the outermost regions to a radius of 20 AU, corresponding to the outer limit of the inner cavity derived from previous observations. In the inner cavity, these aromatic particles might be present but their abundance would then be significantly decreased.
description: 11 pages, 8 figures
Quantification of meteorological conditions for rockfall triggers in Germany
Creators: name: Nissen, Katrin M.
name: Rupp, Stefan
name: Kreuzer, Thomas M.
name: Guse, Björn
name: Damm, Bodo
name: Ulbrich, Uwe
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: rockfall trigger
subject: Germany
subject: Quantification meteorological conditions
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::551 Geologie, Hydrologie, Meteorologie

description: A rockfall dataset for Germany is analysed with the objective of identifying the meteorological and hydrological (pre-)conditions that change the probability for such events in central Europe. The factors investigated in the analysis are precipitation amount and intensity, freeze–thaw cycles, and subsurface moisture. As there is no suitable observational dataset for all relevant subsurface moisture types (e.g. water in rock pores and cleft water) available, simulated soil moisture and a proxy for pore water are tested as substitutes. The potential triggering factors were analysed both for the day of the event and for the days leading up to it. A logistic regression model was built, which considers individual potential triggering factors and their interactions. It is found that the most important factor influencing rockfall probability in the research area is the precipitation amount at the day of the event, but the water content of the ground on that day and freeze–thaw cycles in the days prior to the event also influence the hazard probability. Comparing simulated soil moisture and the pore-water proxy as predictors for rockfall reveals that the proxy, calculated as accumulated precipitation minus potential evaporation, performs slightly better in the statistical model. Using the statistical model, the effects of meteorological conditions on rockfall probability in German low mountain ranges can be quantified. The model suggests that precipitation is most efficient when the pore-water content of the ground is high. An increase in daily precipitation from its local 50th percentile to its 90th percentile approximately doubles the probability for a rockfall event under median pore-water conditions. When the pore-water proxy is at its 95th percentile, the same increase in precipitation leads to a 4-fold increase in rockfall probability. The occurrence of a freeze–thaw cycle in the preceding days increases the rockfall hazard by about 50 %. The most critical combination can therefore be expected in winter and at the beginning of spring after a freeze–thaw transition, which is followed by a day with high precipitation amounts and takes place in a region preconditioned by a high level of subsurface moisture.
Disability Support Workers: COVID-19 vaccine hesitancy and communication needs
Creators: name: KAVANAGH, ANNE
name: Dimov, Stefanie
name: DICKINSON, HELEN
name: McAllister, Ashley
name: Shields, Marissa
name: Alex, Sully
Publisher: name: University of Melbourne
Year: 2021
Subjects: Welfare, insurance, disability and social security law
Health policy

description: Disability Support Workers are at greater risk of COVID-19 infection due to the nature of their work, which often involves close physical contact, sometimes with numerous people who are themselves at high risk. DSWs are also at risk of transmitting the virus to the people they support. Findings from our first two surveys of DSWs conducted in last year showed that they were supporting an average of five to six clients per week.
In Victoria’s second wave, we saw COVID-19 outbreaks in over 60 group homes in Victoria. In recognition of their increased risk they were prioritised for access to personal protective equipment, and, in Victoria, there were initiatives to reduce worker mobility, introduction of paid pandemic leave, and a COVID-19 Disability Rapid Response Group (DRRG) was established.
Given their increased risk of becoming infected and transmitting COVID-19, DSWs have been prioritised for vaccine rollout. At the time of this report being published, DSWs working in group homes are in phase 1a, the highest priority group for vaccination; other DSWs are in 1b . It is noted that on 8th April 2021, the Prime Minister called for recommendations that AstraZeneca was reserved for people over 50 with Australians under 50 prioritised for Pfitzer. This occurred after there was consensus internationally that the AstraZeneca vaccine was a likely cause of disease associated with low platelets and clotting, which was more common among younger people. However, concerns about AztraZeneca had been reported across the world for some weeks before the Prime Minister’s announcement.
Achieving high-levels of vaccination among workers is critical if people with disability are to be protected against COVID-19. To achieve high vaccine coverage among DSWs we need to know their vaccine intentions, who they trust to provide information, and concerns that they have.

We present findings from a survey of the likelihood of vaccine acceptance from Disability Support Workers as well as the reasons for deciding not to get the COVID-19 vaccine.

www.credh.org.au
ტერმინ ‘თემის’ მნიშვნელობის დაზუსტებისათვის
For Clarification of the Meaning of the Term “Temi”
Creators: name: ბარნაველი, მაია
name: Barnaveli, Maia
Publisher: name: თსუ არნოლდ ჩიქობავას სახელობის ენათმეცნიერების ინსტიტუტი
Year: 2020
Subjects: თემი
თემქვეყანა
მოთემე
ქვეყნის ერთი ნაწილი
ტერმინოლოგია
Temi
community
part of the country
terminology

description: The word თემი (Temi) has long meant and still means a corner or region of a country that isunited on geographical and ethnic grounds, with some people living together in villages or a collection of some villages. In the mountainous Georgian villages, თემი (Temi) has the meaning of families sharing a single surname with their own leader, habits and traditions (ფშაველთა თემი – the temi of the Pshavians). In recent times, there has been an attempt to establish another meaning for this word by ignoring linguistic rules. What we are speaking of is how the new meaning being established fails to include the people together locally, as it used to mean in Georgian for centuries. For example, here is one of the meanings for this word given in an encyclopedic dictionary (the electronic version under the heading “Civil” Encyclopedic Dictionary): “თემი (Temi) – the uniting factor between common interests, points of view, opinions, activities, hobbies, dwelling places, sex or nationality. The basis of the term თემი (Temi) is the relationship between people” (Source: Introduction to LGBT Journalism by Shorena Gabunia, edited by Mr. Irakli Vacharadze, "The Nongovernmental Organization Identoba, Tbilisi, 2013. 319 pages; attachment 145-316; Dictionary: P. 3-34)”. The English term community, meaning “a group of people living in one place” is considered as the equivalent of the Georgian word თემი, and it is given as such in its Georgian translation in the electronic sources of dictionaries. Besides the given meaning, it also includes the meaning of a people united by common attributes, which in Georgian – also according to the data in lexicons – corresponds to the ideas of ტერმინ თემის მნიშვნელობის დაზუსტებისათვის 65 “sazogadoeba” or “gaertianeba” (“society “union,” ”group,” etc.) This paper will attempt to prove that the definition of the word თემი (Temi) should be explained as tied to a local and territorial features and in the cases mentioned above in this abstract, the English word community could be translated into “gaertianeba” (“union” or “association”) or any other relevant word, which should be decided through the agreement of linguists.
description: NA
Zigzag magnetic order in a novel tellurate compound Na$_{4-δ}$NiTeO$_{6}$ with $\mathit{S}$ = 1 chains
Creators: name: Su, Cheng
name: Zeng, Xu-Tao
name: Li, Yi
name: Ma, Nvsen
name: Lin, Zhengwang
name: Zhang, Chuandi
name: Wang, Chin-Wei
name: Chen, Ziyu
name: Lu, Xingye
name: Li, Wei
name: Sheng, Xian-Lei
name: Jin, Wentao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Na$_{4-δ}$NiTeO$_{6}$ is a rare example in the transition-metal tellurate family of realizing an $S$ = 1 spin-chain structure. By performing neutron powder diffraction measurements, the ground-state magnetic structure of Na$_{4-δ}$NiTeO$_{6}$ is determined. These measurements reveal that below $T\rm_{N}$ ${\sim}$ 6.8(2) K, the Ni$^{2+}$ moments form a screwed ferromagnetic (FM) spin-chain structure running along the crystallographic $a$ axis but these FM spin chains are coupled antiferromagnetically along the $b$ and $c$ directions, giving rise to a magnetic propagation vector of $k$ = (0, 1/2, 1/2). This zigzag magnetic order is well supported by first-principles calculations. The moment size of Ni$^{2+}$ spins is determined to be 2.1(1) $μ$$\rm_{B}$ at 3 K, suggesting a significant quenching of the orbital moment due to the crystalline electric field (CEF) effect. The previously reported metamagnetic transition near $H\rm_{C}$ ${\sim}$ 0.1 T can be understood as a field-induced spin-flip transition. The relatively easy tunability of the dimensionality of its magnetism by external parameters makes Na$_{4-δ}$NiTeO$_{6}$ a promising candidate for further exploring various types of novel spin-chain physics.
description: 10 pages, 6 figures
A Submillimeter Perspective on the GOODS Fields (SUPER GOODS). V. Deep 450 Micron Imaging
Creators: name: Barger, A. J.
name: Cowie, L. L.
name: Blair, A. H.
name: Jones, L. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present deep SCUBA-2 450 micron imaging of the two GOODS fields, achieving a central rms of 1.14 mJy for the GOODS-N and 1.86 mJy for the GOODS-S. For each field, we give a catalog of >4-sigma detections (79 and 16 sources, respectively). We construct the 450 micron number counts, finding excellent agreement with others from the literature. We match the 450 micron sources to 20 cm data (both fields) and ALMA 870 micron data (GOODS-S) to gauge the accuracy of the 450 micron positions. We use the extensive redshift information available on the fields to test how well redshift can be estimated from simple flux ratios (450 micron/850 micron and 20 cm/850 micron), finding tight correlations. We provide a catalog of candidate high-redshift submillimeter galaxies. We look for evolution in dust temperature with redshift by fitting the spectral energy distributions of the sources, but we do not find any significant redshift evolution after accounting for the far-infrared luminosity. We do not find evidence for 450 micron selection picking out warmer sources than 850 micron selection. We find that a 450 micron selected sample only adds low-redshift (z<1.5) galaxies beyond an 850 micron sample.
description: 24 pages, 15 figures, accepted for publication in ApJ. Updated references and fixed source names in Tables 2 and 4 after proofs
Diet, shift workers and metabolic health: improving metabolic health outcomes of shift working populations.
Creators: name: CLARK, ANGELA
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 420208
subject: Nutritional epidemiology
classificationCode: 321099
subject: Nutrition and dietetics not elsewhere classified
classificationCode: 321005
subject: Public health nutrition

description: Shift workers are more likely to struggle with weight gain and have higher risk of developing diabetes and heart disease compared to non-shift workers. The impact of shift schedules on diet, and nighttime eating, which is often unavoidable on night shifts, is frequently overlooked as a contributor to poorer health. This thesis explores the contribution of diet to worsened shift worker health. It also investigates three dietary strategies trialled by shift workers; two intermittent fasting and one energy restriction diet, to successfully achieve weight loss and reduce these health risks.
Disability Support Workers: COVID-19 vaccine hesitancy and communication needs
Creators: name: KAVANAGH, ANNE
name: Dimov, Stefanie
name: DICKINSON, HELEN
name: McAllister, Ashley
name: Shields, Marissa
name: Alex, Sully
Publisher: name: University of Melbourne
Year: 2021
Subjects: Welfare, insurance, disability and social security law
Health policy

description: Disability Support Workers are at greater risk of COVID-19 infection due to the nature of their work, which often involves close physical contact, sometimes with numerous people who are themselves at high risk. DSWs are also at risk of transmitting the virus to the people they support. Findings from our first two surveys of DSWs conducted in 2020, showed that they were supporting an average of five to six clients per week.
In Victoria’s second wave, we saw COVID-19 outbreaks in over 60 group homes in Victoria. In recognition of their increased risk they were prioritised for access to personal protective equipment, and, in Victoria, there were initiatives to reduce worker mobility, introduction of paid pandemic leave, and a COVID-19 Disability Rapid Response Group (DRRG) was established.
Given their increased risk of becoming infected and transmitting COVID-19, DSWs have been prioritised for vaccine rollout. At the time of this report being published, DSWs working in group homes are in phase 1a, the highest priority group for vaccination; other DSWs are in 1b . It is noted that on 8th April 2021, the Prime Minister called for recommendations that AstraZeneca was reserved for people over 50 with Australians under 50 prioritised for Pfitzer. This occurred after there was consensus internationally that the AstraZeneca vaccine was a likely cause of disease associated with low platelets and clotting, which was more common among younger people. However, concerns about AztraZeneca had been reported across the world for some weeks before the Prime Minister’s announcement.
Achieving high-levels of vaccination among workers is critical if people with disability are to be protected against COVID-19. To achieve high vaccine coverage among DSWs we need to know their vaccine intentions, who they trust to provide information, and concerns that they have.

Between March and April 2021, researchers from the University of Melbourne and UNSW Canberra conducted an online survey of over 350 disability support workers (DSWs) about their opinions and needs surrounding the COVID-19 vaccine.

In this report, we present findings from the survey of Disability Support Workers and their willingness and hesitancy towards the COVID-19 vaccine.

https://credh.org.au/covid-19/dsw-vaccine/
Patientinnenzentrierte Behandlung des Mammakarzinoms
Creators: name: Karsten, Maria Margarete
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: Patient Reported Outcomes
subject: Breast Cancer
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: In den Ausführungen konnte gezeigt werden, dass sich die Behandlung des Mammakarzinoms in den vergangenen 50 Jahren radikal verändert hat. Neben den operativen Veränderungen im Sinne einer zunehmenden Reduktion des Eingriffes haben sich gleichzeitig, vor allem bedingt durch medikamentöse Therapiemöglichkeiten, die Heilungschancen bei Brustkrebs im Frühstadium stark verbessert. Auch in der metastasierten Situation hat sich das Überleben deutlich verlängert. Die Hoffnung ist, dass diese Entwicklung weiter anhält. Trotz oder auch aufgrund der zunehmenden Reduktion des operativen Vorgehens verbunden mit immer komplexeren individualisierten Therapiemöglichkeiten ist die Zahl an Mammakarzinom-Behandlungsoptionen exponentiell gestiegen. Dies bedeutet gleichzeitig, dass sowohl das medizinische Personal wie auch die betroffene Patientin mit deutlich komplexeren Entscheidungsprozessen konfrontiert werden, für die es neue Beurteilungskriterien braucht. Diese Beurteilungskriterien sind nötig, um die kurz-, mittel- und langfristigen Folgen für die Patientin objektiv aufzeigen zu können. Die Nutzung von PROs bildet das Bindeglied zwischen einer modernen patient*innen- zentrierten medikamentösen/chirurgischen Therapie und den Wünschen, Vorstellungen und Wertvorstellungen der betroffenen Patientin. PROs können als patient*innen- zentriertes Symptommonitoring während der Therapie genutzt werden. PRO-Langzeit- daten können Therapieentscheidungen unterstützen und in der Nachsorge als Monitoring genutzt werden. Die Nutzung von PROs hat möglicherweise auch einen positiven Einfluss auf das Überleben von Mammakarzinom-Patientinnen. Ob sich die Ergebnisse von Basch und Denis zum intensivierten Symptommonitoring auch bei der Mammakarzinom-Erkrankung bestätigen, wird die PRO B Studie zeigen.
Disability Support Workers: COVID-19 vaccine hesitancy and communication needs
Creators: name: KAVANAGH, ANNE
name: Dimov, Stefanie
name: DICKINSON, HELEN
name: McAllister, Ashley
name: Shields, Marissa
name: Alex, Sully
Publisher: name: University of Melbourne
Year: 2021
Subjects: Welfare, insurance, disability and social security law
Health policy

description: Disability Support Workers are at greater risk of COVID-19 infection due to the nature of their work, which often involves close physical contact, sometimes with numerous people who are themselves at high risk. DSWs are also at risk of transmitting the virus to the people they support. Findings from our first two surveys of DSWs conducted in 2020, showed that they were supporting an average of five to six clients per week.
In Victoria’s second wave, we saw COVID-19 outbreaks in over 60 group homes in Victoria. In recognition of their increased risk they were prioritised for access to personal protective equipment, and, in Victoria, there were initiatives to reduce worker mobility, introduction of paid pandemic leave, and a COVID-19 Disability Rapid Response Group (DRRG) was established.
Given their increased risk of becoming infected and transmitting COVID-19, DSWs have been prioritised for vaccine rollout. At the time of this report being published, DSWs working in group homes are in phase 1a, the highest priority group for vaccination; other DSWs are in 1b . It is noted that on 8th April 2021, the Prime Minister called for recommendations that AstraZeneca was reserved for people over 50 with Australians under 50 prioritised for Pfitzer. This occurred after there was consensus internationally that the AstraZeneca vaccine was a likely cause of disease associated with low platelets and clotting, which was more common among younger people. However, concerns about AztraZeneca had been reported across the world for some weeks before the Prime Minister’s announcement.
Achieving high-levels of vaccination among workers is critical if people with disability are to be protected against COVID-19. To achieve high vaccine coverage among DSWs we need to know their vaccine intentions, who they trust to provide information, and concerns that they have.

Between March and April 2021, researchers from the University of Melbourne and UNSW Canberra conducted an online survey of over 350 disability support workers (DSWs) about their opinions and needs surrounding the COVID-19 vaccine.

In this report, we present the findings from the disability support workforce and their willingness and hesitancy towards the COVID-19 vaccine.

https://credh.org.au/covid-19/dsw-vaccine/
The defocused observations of bright sources with Athena/X-IFU
Creators: name: Kammoun, E. S.
name: Barret, D.
name: Peille, P.
name: Willingale, R.
name: Dauser, T.
name: Wilms, J.
name: Guainazzi, M.
name: Miller, J. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The X-ray Integral Field Unit (X-IFU) is the high resolution X-ray spectrometer of ESA's Athena X-ray observatory. It will deliver X-ray data in the 0.2-12 keV band with an unprecedented spectral resolution of 2.5 eV up to 7 keV. During the observation of very bright X-ray sources, the X-IFU detectors will receive high photon rates. The count rate capability of the X-IFU will be improved by using the defocusing option, which will enable the observations of extremely bright sources with fluxes up to $\simeq 1$ Crab. In the defocused mode, the point spread function (PSF) of the telescope will be spread over a large number of pixels. In this case, each pixel receives a small fraction of the overall flux. Due to the energy dependence of the PSF, this mode will generate energy dependent artefacts increasing with count rate if not analysed properly. To account for the degradation of the energy resolution with pulse separation in a pixel, a grading scheme (here four grades) will be defined to affect the proper energy response to each event. This will create selection effects preventing the use of the nominal Auxiliary Response File (ARF) for all events. We present a new method for the reconstruction of the spectra obtained from observations performed with a PSF that varies as a function of energy. We apply our method to the case of the X-IFU spectra obtained during the defocused observations. We use the end-to-end SIXTE simulator to model defocused X-IFU observations. Then we estimate new ARF for each of the grades by calculating the effective area at the level of each pixel. Our method allows us to successfully reconstruct the spectra of bright sources when employed in the defocused mode, without any bias. Finally, we address how various sources of uncertainty related to our knowledge of the PSF as a function of energy affect our results.
description: Accepted for publication in A&A
Polyester microplastic fibers affect soil physical properties and erosion as a function of soil type
Creators: name: Ingraffia, Rosolino
name: Amato, Gaetano
name: Bagarello, Vincenzo
name: Carollo, Francesco G.
name: Giambalvo, Dario
name: Iovino, Massimo
name: Lehmann, Anika
name: Rillig, Matthias C.
name: Frenda, Alfonso S.
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Polyester microplastic
subject: erosion
subject: soil physical properties
subject: soil type
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
subject: 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche

description: Microplastics are recognized as a factor of global change contaminating many environmental compartments. Agricultural soils are very likely to receive microplastic contamination and are of particular concern due to their role in food production. Microplastic fibers have already been shown to be able to affect soil properties, but their effect on different soil types is poorly understood. Moreover, limited information is available on how the presence of this pollutant can affect soil water erosion processes, which are extremely important issues in many environments. In the light of this, we performed two experiments (carried out on a microscale) to investigate how the presence of polyester microplastic fibers affects soil physical and hydrological parameters and processes such as aggregate formation and soil erosion in three different agricultural soil types (a Vertisol, an Entisol, and an Alfisol). Our data show that the effects of polyester microplastic fibers on soil physical parameters and erosion are strongly dependent on soil type. We found that microplastic fiber contamination can affect soil bulk density, capacitive indicators of soil physical quality, and decrease the formation of new aggregates (labile in the incubation period applied in our experiments) but did not affect their stability in water. However, we found that polyester microplastic fibers reduced soil loss and sediment concentration, especially in the most erodible soils. In this paper, we provide some hypotheses, but certainly future data are still needed to confirm or disprove our hypotheses. Overall, our results highlight the importance of broadly exploring soil properties, such as texture, mineralogy, organic carbon content, etc., to better understand how the various soil types respond to microplastic fiber contamination.
The role of spirituality in identity after trauma
Creators: name: NGUYEN, THI LUAN
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 520505
subject: Social psychology
classificationCode: 520504
subject: Psychology of religion

description: Spirituality has been regarded as a means to develop and consolidate an identity, however, much of the research has been undertaken in the general population. The aim of this doctoral research is to explore the relation between spirituality and identity within the context of trauma. To date, there is a lack of consensus on the definition of spirituality. Thus, the first objective of this research is to generate a clear conceptualization of spirituality within the context of trauma. The second objective is to identify the mechanisms that underpin the relation between spirituality and identity after trauma.
Intégration continue avec GitLab
Creators: name: Bertrand, Nicolas
Publisher: name: Zenodo
Year: 2022
Subjects: pipeline CI
intégration continue
GitLab
GitLab Runner
build
unit test
code coverage
code quality
Spring
Maven
Docker
Kaniko

description: GitLab est une plateforme de développement open source dédiée à la gestion de projet informatique. De la gestion de version du code source, en passant par son tableau de bord qui permet de suivre les tâches en cours ou encore par la définition précise des rôles de chaque membre de l'équipe, GitLab offre un grand nombre de fonctionnalités qui facilitent le travail collaboratif. Dans ce tutoriel, je vais tenter d'expliquer quelques notions techniques et fournir des extraits de code en me concentrant sur l'aspect intégration continue. Pour ce faire, je vais utiliser la plateforme DevOps accessible en ligne à l'adresse https://about.gitlab.com. L'objectif est de créer un pipeline d'intégration continue contenant six étapes d'automatisation, à savoir, l'étape de compilation, des tests unitaires, de la couverture du code par les tests, de la qualité du code, de la création de package pour terminer avec la création d'image pour conteneuriser nos applications.
Heliospheric Compression due to Recent Nearby Supernova Explosions
Creators: name: Miller, Jesse A.
name: Fields, Brian D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The widespread detection of 60Fe in geological and lunar archives provides compelling evidence for recent nearby supernova explosions within $\sim 100$ pc around 3 Myr and 7 Myr ago. The blasts from these explosions had a profound effect on the heliosphere. We perform new calculations to study the compression of the heliosphere due to a supernova blast. Assuming a steady but non-isotropic solar wind, we explore a range of properties appropriate for supernova distances inspired by recent 60Fe data, and for a 20 pc supernova proposed to account for mass extinctions at the end-Devonian period. We examine the locations of the termination shock decelerating the solar wind and the heliopause that marks the boundary between the solar wind and supernova material. Pressure balance scaling holds, consistent with studies of other astrospheres. Solar wind anisotropy does not have an appreciable effect on shock geometry. We find that supernova explosions at 50 pc (95 pc) lead to heliopause locations at 16 au (23 au) when the forward shock arrives. Thus, the outer solar system was directly exposed to the blast, but the inner planets -- including the Earth -- were not. This finding reaffirms that the delivery of supernova material to the Earth is not from the blast plasma itself, but likely is from supernova dust grains. After the arrival of the forward shock, the weakening supernova blast will lead to a gradual rebound of the heliosphere, taking $\sim100$s of kyr to expand beyond 100 au. Prospects for future work are discussed.
description: 18 pages, 11 figures. Comments welcome
Type IV Radio Bursts and Associated Active Regions in the Sunspot Cycle 24
Creators: name: Kumari, Anshu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this article, the association of solar radio type IV bursts with active region location on the Sun is studied for the solar cycle 24. The active regions associated with moving and stationary type IV bursts are categorised as close to disk center and far from disk center regions based on their location on the solar surface (i.e, $\leq 45^{\circ}$ or $\geq 45^{\circ}$, respectively). The location of the active regions associated with type IV bursts accompanied with coronal mass ejections (CMEs) are also studied. We found that $\approx 30-40 \%$ of the active regions are located far from disk center for all the bursts. It is found that most of the active regions associated with stationary type IV bursts are close to disk center ($\approx 60-70 \%$). The active regions associated with moving type IV bursts are more evenly distributed across the surface, i.e $\approx 56 \%$ and $\approx 44 \%$, close to disk center and far from disk center regions, respectively. Most of the burst having active region close to disk center indicate that these bursts can be used to obtain physical properties such as electron density and magnetic fields of the coronal mass ejections responsible for geomagnetic storms.
description: 3 figures, 1 table, Accepted for publication in Solar Physics
Direct Imaging Discovery and Dynamical Mass of a Substellar Companion Orbiting an Accelerating Hyades Sun-like Star with SCExAO/CHARIS
Creators: name: Kuzuhara, Masayuki
name: Currie, Thayne
name: Takarada, Takuya
name: Brandt, Timothy D.
name: Sato, Bun'ei
name: Uyama, Taichi
name: Janson, Markus
name: Chilcote, Jeffrey
name: Tobin, Taylor
name: Lawson, Kellen
name: Hori, Yasunori
name: Guyon, Olivier
name: Groff, Tyler D.
name: Lozi, Julien
name: Vievard, Sebastien
name: Sahoo, Ananya
name: Deo, Vincent
name: Jovanovic, Nemanja
name: Ahn, Kyohoon
name: Martinache, Frantz
name: Skaf, Nour
name: Akiyama, Eiji
name: Norris, Barnaby R.
name: Bonnefoy, Mickael
name: Hełminiak, Krzysztof G.
name: Kudo, Tomoyuki
name: McElwain, Michael W.
name: Samland, Matthias
name: Wagner, Kevin
name: Wisniewski, John
name: Knapp, Gillian R.
name: Kwon, Jungmi
name: Nishikawa, Jun
name: Serabyn, Eugene
name: Hayashi, Masahiko
name: Tamura, Motohide
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the direct-imaging discovery of a substellar companion in orbit around a Sun-like star member of the Hyades open cluster. So far, no other substellar companions have been unambiguously confirmed via direct imaging around main-sequence stars in Hyades. The star HIP 21152 is an accelerating star as identified by the astrometry from the Gaia and Hipparcos satellites. We have detected the companion, HIP 21152 B, in multi-epoch using the high-contrast imaging from SCExAO/CHARIS and Keck/NIRC2. We have also obtained the stellar radial-velocity data from the Okayama 188cm telescope. The CHARIS spectroscopy reveals that HIP 21152 B's spectrum is consistent with the L/T transition, best fit by an early T dwarf. Our orbit modeling determines the semi-major axis and the dynamical mass of HIP 21152 B to be 17.5$^{+7.2}_{-3.8}$ au and 27.8$^{+8.4}_{-5.4}$ $M_{\rm{Jup}}$, respectively. The mass ratio of HIP 21152 B relative to its host is $\approx$2\%, near the planet/brown dwarf boundary suggested from recent surveys. Mass estimates inferred from luminosity evolution models are slightly higher (33--42 $M_{\rm{Jup}}$). With a dynamical mass and a well-constrained age due to the system's Hyades membership, HIP 21152 B will become a critical benchmark in understanding the formation, evolution, and atmosphere of a substellar object as a function of mass and age. Our discovery is yet another key proof-of-concept for using precision astrometry to select direct imaging targets.
description: 21 pages (11 pages in main body), 8 figures (4 figures in main body). Accepted for Publication in ApJL at July 9, 2022 (UT)
Universal relations for quasinormal modes of neutron stars in $R^2$ gravity
Creators: name: Blázquez-Salcedo, J. L.
name: González-Romero, L. M.
name: Khoo, F. S.
name: Kunz, J.
name: Preut, V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct quasinormal modes for neutron stars in $R^2$ gravity in the Einstein frame, considering scalar masses in the sub-neV range. In particular, we investigate the fundamental quadrupole fluid f-modes and the dipole fluid F-modes. Employing six equations of state covering matter content with nucleons, hyperons, and quarks, we then propose universal relations for the quadrupole f-modes and dipole F-modes. The dipole F-modes are ultra-long lived and, for the lower scalar masses, their frequencies are inversely proportional to the corresponding Compton wavelength.
description: 25 pages, 23 figures; Some figures updated
Calliostoma Swainson 1840
Creators: name: Cavallari, Daniel C.
name: Simone, Luiz R. L.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Archaeogastropoda
Calliostomatidae
Calliostoma

description: Genus Calliostoma Swainson, 1840
Type species. Trochus conulus Linnaeus, 1758 (by SD, Herrmannsen, 1846). Recent, Mediterranean Sea.
description: Published as part of Cavallari, Daniel C. & Simone, Luiz R. L., 2018, A new species of Calliostoma (Vetigastropoda: Calliostomatidae) from Canopus Bank, off northeastern Brazil, pp. 156-166 in Zootaxa 4457 (1) on page 157, DOI: 10.11646/zootaxa.4457.1.8, http://zenodo.org/record/1457655
Asteroseismology of evolved stars to constrain the internal transport of angular momentum. V. Efficiency of the transport on the red giant branch and in the red clump
Creators: name: Moyano, F. D.
name: Eggenberger, P.
name: Meynet, G.
name: Gehan, C.
name: Mosser, B.
name: Buldgen, G.
name: Salmon, S. J. A. J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Thanks to asteroseismology, constraints on the core rotation rate are available for hundreds of low- and intermediate-mass stars in evolved phases. Current physical processes tested in stellar evolution models cannot reproduce the evolution of these core rotation rates. We investigate the efficiency of the internal angular momentum redistribution in red giants during the hydrogen shell and core-helium burning phases based on the asteroseismic determinations of their core rotation rates. We compute stellar evolution models with rotation and model the transport of angular momentum by the action of a sole dominant diffusive process parametrized by an additional viscosity. We constrain the values of this viscosity to match the mean core rotation rates of red giants and their behaviour with mass and evolution along the red giant branch and in the red clump. For red giants in the hydrogen shell-burning phase the transport of angular momentum must be more efficient in more massive stars. The additional viscosity is found to vary by approximately two orders of magnitude in the mass range M $\sim$ 1 - 2.5 M$_{\odot}$. As stars evolve along the red giant branch, the efficiency of the internal transport of angular momentum must increase for low-mass stars (M $\lesssim$ 2 M$_{\odot}$) and remain approximately constant for slightly higher masses (2.0 M$_{\odot}$ $\lesssim$ M $\lesssim$ 2.5 M$_{\odot}$). In red-clump stars, the additional viscosities must be an order of magnitude higher than in younger red giants of similar mass during the hydrogen shell-burning phase. In combination with previous efforts, we obtain a clear picture of how the physical processes acting in stellar interiors should redistribute angular momentum from the end of the main sequence until the core-helium burning phase for low- and intermediate-mass stars to satisfy the asteroseismic constraints.
description: 10 pages, 12 figures, 1 table. Accepted for publication in A&A
Anomalous diffusion and transport by a reciprocal convective flow
Creators: name: Koyano, Yuki
name: Kitahata, Hiroyuki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Under low-Reynolds-number conditions, dynamics of convection and diffusion are usually considered separately because their dominant spatial and temporal scales are different, but cooperative effects of convection and diffusion can cause diffusion enhancement [Koyano et al., Phys. Rev. E, 102, 033109 (2020)]. In this study, such cooperative effects are investigated in detail. Numerical simulations based on the convection-diffusion equation revealed that anisotropic diffusion and net shift as well as diffusion enhancement occur under a reciprocal flow. Such anomalous diffusion and transport are theoretically derived by the analyses of the Langevin dynamics.
description: 11 pages, 10 figures
A Novel Solution for Resonant Scattering Using Self-Consistent Boundary Conditions
Creators: name: McClellan, B. Connor
name: Davis, Shane
name: Arras, Phil
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present two novel additions to the semi-analytic solution of Lyman $α$ (Ly$α$) radiative transfer in spherical geometry: (1) implementation of the correct boundary condition for a steady source, and (2) solution of the time-dependent problem for an impulsive source. For the steady-state problem, the solution can be represented as a sum of two terms: a previously-known analytic solution of the equation with mean intensity $J=0$ at the surface, and a novel, semi-analytic solution which enforces the correct boundary condition of zero-ingoing intensity at the surface. This solution is compared to that of the Monte Carlo method, which is valid at arbitrary optical depth. It is shown that the size of the correction is of order unity when the spectral peaks approach the Doppler core and decreases slowly with line center optical depth, specifically as $(a τ_0)^{-1/3}$, which may explain discrepancies seen in previous studies. For the impulsive problem, the time, spatial, and frequency dependence of the solution are expressed using an eigenfunction expansion in order to characterize the escape time distribution and emergent spectra of photons. It is shown that the lowest-order eigenfrequency agrees well with the decay rate found in the Monte Carlo escape time distribution at sufficiently large line-center optical depths. The characterization of the escape-time distribution highlights the potential for a Monte Carlo acceleration method, which would sample photon escape properties from distributions rather than calculating every photon scattering, thereby reducing computational demand.
description: 23 pages, 10 figures, 2 appendices, resubmitted to ApJ after review
An X-ray View of the Ambiguous Nuclear Transient AT2019pev
Creators: name: Yu, Zhefu
name: Kochanek, C. S.
name: Mathur, S.
name: Auchettl, K.
name: Grupe, D.
name: Holoien, T. W. -S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: AT2019pev is a nuclear transient in a narrow-line Seyfert 1 galaxy at $z=0.096$. The archival ultraviolet, optical and infrared data showed features of both tidal disruption events (TDEs) and active galactic nuclei (AGNs), and its nature is not fully understood. We present detailed X-ray observations of AT2019pev taken with Swift, Chandra and NICER over 173 days of its evolution since the first Swift XRT epoch. The X-ray luminosity increases by a factor of five in five days from the first Swift XRT epoch to the lightcurve peak. The lightcurve decays by a factor of ten over $\sim$75 days and then flattens with a weak re-brightening trend at late times. The X-ray spectra show a "harder-when-brighter" trend before peak and a "harder-when-fainter" trend after peak, which may indicate a transition of accretion states. The archival ground-based optical observations show similar time evolution as the X-ray lightcurves. Beyond the seasonal limit of the ground-based observations, the Gaia lightcurve is rising toward an equally bright or brighter peak 223 days after the optical discovery. Combining our X-ray analysis and archival multi-wavelength data, AT2019pev more closely resembles an AGN transient.
description: 14 pages, 6 figures; submitted to MNRAS
Cosmology in the presence of diffeomorphism-violating, nondynamical background fields
Creators: name: Reyes, Carlos M.
name: Schreck, Marco
name: Soto, Alex
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: We consider diffeomorphism violation, which is parameterized by nondynamical background fields of the gravitational Standard-Model Extension (SME), and study its effects on the time evolution of the Universe. Our goal is to identify background field configurations that imply stages of accelerated expansion without exotic forms of matter and radiation present. Although our approach gives rise to a set of restrictive conditions, configurations are encountered that exhibit this property or show other interesting behaviors. The findings of our article, which is among the first to apply the SME to a cosmological setting, provide an initial understanding of how to technically incorporate background fields into the cosmological evolution equations and what their phenomenological impact may be.
description: 18 pages, 2 figures
The Curious Case of the "Heartworm" Nebula
Creators: name: Cotton, W. D.
name: Camilo, F.
name: Becker, W.
name: Condon, J. J.
name: Forbrich, J.
name: Heywood, I.
name: Hugo, B.
name: Legodi, S.
name: Mauch, T.
name: Predehl, P.
name: Slane, P.
name: Thompson, M. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The curious Galactic features near G357.2$-$0.2 were observed with the MeerKAT radio interferometer array in the UHF and L bands (0.56--1.68 GHz). There are two possibly related features: a newly identified faint heart-shaped partial shell (the "Heart"), and a series of previously known but now much better imaged narrow, curved features (the "Worm") interior to the heart. Polarized emission suggests that much of the emission is nonthermal and is embedded in a dense plasma. The filaments of the worm appear to be magnetic structures powered by embedded knots that are sites of particle acceleration. The morphology of the worm broadly resembles some known pulsar wind nebulae (PWNe) but there is no known pulsar or PWN which could be powering this structure. We also present eROSITA observations of the field; no part of the nebula is detected in X-rays, but the current limits do not preclude the existence of a pulsar/PWN of intermediate spin-down luminosity.
description: 14 pages, 14 figures
Testing black hole equatorial reflection symmetry using Sgr A* shadow images
Creators: name: Chen, Che-Yu
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The recently released images of the supermassive black holes in the M87 galaxy and the galaxy of our own make probing black hole spacetimes and testing general relativity (GR) possible. The violation of equatorial reflection symmetry of black hole spacetimes is clearly a smoking gun of physics beyond GR. In this paper, we place constraints on the violation of black hole reflection symmetry using the bounds on the ring size of the Sgr A* black hole images, which are consistent with the critical curve radius predicted in GR within $\sim10\%$. Adopting a theory-agnostic framework, we consider a Kerr-like metric in which the violation of reflection symmetry is parametrized by a single parameter, without altering the multipoles of the black hole. The critical curves are always vertically symmetric due to the existence of hidden symmetry associated with the Killing tensor, even though the spacetime is reflection asymmetric. We find that the size of critical curves is sensitive to the amount of reflection symmetry being violated, and place the first constraints on the parameter space of the model using the Sgr A* images.
description: 15 pages, 3 figures, updated to match the published version