9 research outputs found

    A View from the Past Into our Collective Future: The Oncofertility Consortium Vision Statement

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    Today, male and female adult and pediatric cancer patients, individuals transitioning between gender identities, and other individuals facing health extending but fertility limiting treatments can look forward to a fertile future. This is, in part, due to the work of members associated with the Oncofertility Consortium. The Oncofertility Consortium is an international, interdisciplinary initiative originally designed to explore the urgent unmet need associated with the reproductive future of cancer survivors. As the strategies for fertility management were invented, developed or applied, the individuals for who the program offered hope, similarly expanded. As a community of practice, Consortium participants share information in an open and rapid manner to addresses the complex health care and quality-of-life issues of cancer, transgender and other patients. To ensure that the organization remains contemporary to the needs of the community, the field designed a fully inclusive mechanism for strategic planning and here present the findings of this process. This interprofessional network of medical specialists, scientists, and scholars in the law, medical ethics, religious studies and other disciplines associated with human interventions, explore the relationships between health, disease, survivorship, treatment, gender and reproductive longevity. The goals are to continually integrate the best science in the service of the needs of patients and build a community of care that is ready for the challenges of the field in the future

    Observation of gravitational waves from the coalescence of a 2.5−4.5 M⊙ compact object and a neutron star

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    Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

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    Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≀0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level

    Ultralight vector dark matter search using data from the KAGRA O3GK run

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    Among the various candidates for dark matter (DM), ultralight vector DM can be probed by laser interferometric gravitational wave detectors through the measurement of oscillating length changes in the arm cavities. In this context, KAGRA has a unique feature due to differing compositions of its mirrors, enhancing the signal of vector DM in the length change in the auxiliary channels. Here we present the result of a search for U(1)B−L gauge boson DM using the KAGRA data from auxiliary length channels during the first joint observation run together with GEO600. By applying our search pipeline, which takes into account the stochastic nature of ultralight DM, upper bounds on the coupling strength between the U(1)B−L gauge boson and ordinary matter are obtained for a range of DM masses. While our constraints are less stringent than those derived from previous experiments, this study demonstrates the applicability of our method to the lower-mass vector DM search, which is made difficult in this measurement by the short observation time compared to the auto-correlation time scale of DM

    Search for gravitational-lensing signatures in the full third observing run of the LIGO-Virgo network

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    Gravitational lensing by massive objects along the line of sight to the source causes distortions of gravitational wave-signals; such distortions may reveal information about fundamental physics, cosmology and astrophysics. In this work, we have extended the search for lensing signatures to all binary black hole events from the third observing run of the LIGO--Virgo network. We search for repeated signals from strong lensing by 1) performing targeted searches for subthreshold signals, 2) calculating the degree of overlap amongst the intrinsic parameters and sky location of pairs of signals, 3) comparing the similarities of the spectrograms amongst pairs of signals, and 4) performing dual-signal Bayesian analysis that takes into account selection effects and astrophysical knowledge. We also search for distortions to the gravitational waveform caused by 1) frequency-independent phase shifts in strongly lensed images, and 2) frequency-dependent modulation of the amplitude and phase due to point masses. None of these searches yields significant evidence for lensing. Finally, we use the non-detection of gravitational-wave lensing to constrain the lensing rate based on the latest merger-rate estimates and the fraction of dark matter composed of compact objects

    The Paleo Data Working Group: A model for developing and sustaining a community of practice

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    The Paleo Data Working Group was launched in May 2020 as a driving force for broader conversations about paleontologic data standards. Here, we present an overview of the “community of practice” model used by this group to evaluate and implement data standards such as those stewarded by Biodiversity Information Standards (TDWG). A community of practice is defined by regular and ongoing interaction among individual members, who find enough value in participating, so that the group achieves a self-sustaining level of activity (Wenger 1998, Wenger and Snyder 2000, Wenger et al. 2002). Communities of practice are not a new phenomenon in biodiversity science, and were recommended by the recent United States National Academies report on biological collections (National Academies of Sciences, Engineering, and Medicine 2020) as a way to support workforce training, data-driven discoveries, and transdisciplinary collaboration. Our collective aim to digitize specimens and mobilize the data presents new opportunities to foster communities of practice that are circumscribed not by research agendas but rather by the need for better data management practices to facilitate research.Paleontology collections professionals in the United States have been meeting to discuss digitization semi-consistently in both virtual and in-person spaces for nearly a decade, largely thanks to support from the iDigBio Paleo Digitization Working Group. The need for a community of practice within this group focused on data management in paleo collections became apparent at the biodiversity_next Conference in October 2019, where we realized that work being done in the biodiversity standards community was not being informed by or filtering back to digitization and data mobilization efforts occurring in the paleo collections community. A virtual workshop focused on georeferencing for paleo in April 2020 was conceived as an initial pathway to bridge these two communities and provided a concrete example of how useful it can be to interweave practical digitization experience with conceptual data standards.In May 2020, the Paleo Data Working Group began meeting biweekly on Zoom, with discussion topics collaboratively developed, presented, and discussed by members and supplemented with invited speakers when appropriate. Topics centered on implementation of data standards (e.g., Darwin Core) by collections staff, and how standards can evolve to better represent data. An associated Slack channel facilitated continuing conversations asynchronously. Engaging domain experts (e.g., paleo collections staff) in the conceptualization of information throughout the data lifecycle helped to pinpoint issues and gaps within the existing standards and revealed opportunities for increasing accessibility. Additionally, when domain experts gained a better understanding of the information science framework underlying the data standards they were better able to apply them to their own data. This critical step of standards implementation at the collections level has often been slow to follow standards development, except in the few collections that have the funds and/or expertise to do so. Overall, we found the Paleo Data Working Group model of knowledge sharing to be mutually beneficial for standards developers and collections professionals, and it has led to a community of practice where informatics and paleo domain expertise intersect with a low barrier to entry for new members of both groups.Serving as a loosely organized voice for the needs of the paleo collections community, the Paleo Data Working Group has contributed to several initiatives in the broader biodiversity community. For example, during the 2021 public review of Darwin Core maintenance proposals, the Paleo Data Working Group shared the workload of evaluating and commenting on issues among its members. Not only was this efficient for us, but it was also effective for the TDWG review process, which sought to engage a broad audience while also reaching consensus. The Paleo Data Working Group has also served as a coordinated point of contact for adjacent and intersecting activities related to both data standards (e.g., those led by the TDWG Earth Sciences and Paleobiology Interest Group and the TDWG Collections Description Interest Group) and paleontological research (e.g., those led by the Paleobiology Database and the Integrative Paleobotany Portal project).Sustaining activities, like those of the Paleo Data Working Group, require consideration and regular attention. Support staff at iDigBio and collections staff focusing on digitization or data projects at their own institutions, as well as a consistent pool of drop-in and occasional participants, have been instrumental in maintaining momentum for the community of practice. Socializing can also help build the personal relationships necessary for maintaining momentum. To this extent, the Paleo Data Working Group Slack encourages friendly banter (e.g., the #pets-of-paleo channel), more general collections-related conversations (e.g., the #physical-space channel), and space for those with sub-interests to connect (e.g., the #morphology channel). While the focus of the group is on data, on an individual level, our group members find it useful to network on a wide variety of topics and this usefulness is critical to sustaining the community of practice.As we look forward to Digital Extended Specimen concepts and exciting developments in cyberinfrastructure for biodiversity data, communities of practice like that exemplified by the Paleo Data Working Group are essential for success. Creating FAIR (Findable, Accessible, Interoperable and Reusable) data requires buy-in from data providers, such as those in the paleo collections community. Even beyond FAIR, considering CARE (Collective Benefit, Authority to Control, Responsibility, and Ethics) data means embracing participation from a broad spectrum of perspectives, including those without informatics experience. Here, we provide insight into one model for creating such buy-in and participation

    Tetrapod ichnotaxonomy in eolian paleoenvironments (Coconino and De Chelly formations, Arizona) and late Cisuralian (Permian) sauropsid radiation

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    The tetrapod footprint record of Permian eolian environments has long been underestimated because of overall poor preservation and its apparent monospecifity. The best known and most abundant Cisuralian record of tetrapod footprints is from the Coconino and De Chelly formations of Arizona, which, however, thus far encompassed only the ichnogenera Chelichnus and Dromopus. We revised the locomotion and taphonomy of these footprints and propose a new model, basing it on: 1) trackways changing direction, 2) trackways heading in different directions on the same surface, 3) trackways in situ, and 4) laboratory experiments with common wall lizards, Podarcis muralis. In all cases, the Chelichnus-like appearance of footprints is due to digit tip sliding on inclined depositional surfaces, masking the original footprint shape and orientation. Also, the trackway pattern and body position are largely influenced by the angle of inclination (dip) of the substrate being walked on. Based on an anatomy-consistent ichnotaxonomy, Chelichnus and Laoporus are here considered nomina dubia, and the footprints from the Coconino and De Chelly formations are revised and assigned to: parareptiles/captorhinomorph eureptiles (Erpetopus, Varanopus curvidactylus), bolosaurid parareptiles/ diapsid eureptiles (cf. Dromopus), varanopid synapsid (cf. Tambachichnium) and reptiliomorph amphibians (Amphisauropus, Ichniotherium sphaerodactylum). The ichnoassociation is dominated by parareptile/captorhinomorph tracks, similarly to all the late Cisuralian marginal marine, floodplain, alluvial fan and ephemeral lacustrine tetrapod ichnoassociations of North America, Europe and North Africa. A review of all the available data including the new results suggests a facies-crossing transition between an early-Cisuralian amphibian- and synapsid-dominated ichnofauna (Dromopus track biochron) and a late Cisuralian parareptile/captorhinomorph-dominated ichnofauna (Erpetopus track biochron) at low latitudes of Pangea

    Search for intermediate-mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo

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    International audienceIntermediate-mass black holes (IMBHs) span the approximate mass range 100−105 M⊙, between black holes (BHs) that formed by stellar collapse and the supermassive BHs at the centers of galaxies. Mergers of IMBH binaries are the most energetic gravitational-wave sources accessible by the terrestrial detector network. Searches of the first two observing runs of Advanced LIGO and Advanced Virgo did not yield any significant IMBH binary signals. In the third observing run (O3), the increased network sensitivity enabled the detection of GW190521, a signal consistent with a binary merger of mass ∌150 M⊙ providing direct evidence of IMBH formation. Here, we report on a dedicated search of O3 data for further IMBH binary mergers, combining both modeled (matched filter) and model-independent search methods. We find some marginal candidates, but none are sufficiently significant to indicate detection of further IMBH mergers. We quantify the sensitivity of the individual search methods and of the combined search using a suite of IMBH binary signals obtained via numerical relativity, including the effects of spins misaligned with the binary orbital axis, and present the resulting upper limits on astrophysical merger rates. Our most stringent limit is for equal mass and aligned spin BH binary of total mass 200 M⊙ and effective aligned spin 0.8 at 0.056 Gpc−3 yr−1 (90% confidence), a factor of 3.5 more constraining than previous LIGO-Virgo limits. We also update the estimated rate of mergers similar to GW190521 to 0.08 Gpc−3 yr−1.Key words: gravitational waves / stars: black holes / black hole physicsCorresponding author: W. Del Pozzo, e-mail: [email protected]† Deceased, August 2020
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