Constraining Yarkovsky Acceleration With Thermophysical Modeling

Ph.D

Staff-Family Communication Methods in Long-Term Care Homes: An Integrative Review

Context: Communication methods have been trialled to promote staff-family relations and facilitate person-centred care for residents living in long-term care homes. A review and synthesis of the common methods will inform the development of stafffamily communication methods, policy and best practice guidelines. Objectives: 1) synthesise and summarise common communication methods, and types(s) of delivery, used for staff-family communication in long-term care homes; and 2) identify any challenges that impacted the implementation of the communication method(s). Methods: An integrative review was employed to incorporate papers with diverse research designs. It involved a comprehensive database and grey literature search, and study selection based on inclusion criteria. Data from included studies were extracted, coded and categorised by common communication method, delivery type(s) and challenges; studies were assessed for quality. Findings: A total of 3,183 potential papers were retrieved from seven international databases. Twenty-four original papers from six countries meeting inclusion criteria were reviewed and assessed for quality (M = 30; SD = 3.8). Common communication methods (structured education, meetings and takeaway resources) and challenges to implementation (confusion, misunderstanding and disagreement; lack of time; and technological difficulties) were identified and summarised. Limitations: The exclusion of papers published more than 20 years ago, geographical concentration of studies in high-income countries, and absence of stakeholder consultation may limit the generalisability and depth of the findings. Implications: Staff professional development and education, technology training and support, and accessibility of information in pamphlets and resources for family are crucial for facilitating staff-family communication in long-term care homes

Detectability of the Yarkovsky Effect in the Main Belt

We attempt to a detect signal of Yarkovsky-related acceleration in the orbits of 134 main belt asteroids (MBAs) we observed with the University of Hawai'i 88 inch telescope, supplemented with observations publicly available from the Minor Planet Center and Gaia Data Release 3. We estimated expected Yarkovsky acceleration values based on parameters derived through thermophysical modeling, but we were not able to find any reliable detections of Yarkovsky in our sample. Through tests with synthetic observations however, we estimated the minimum observational arc length needed to detect the Yarkovsky effect for all of our sample MBAs, which in nearly every case exceeded the current arc length of the existing observations. We find that the Yarkovsky effect could be detectable within a couple of decades of discovery for a 100 m MBA assuming 0.1" astrometric accuracy, which is at the size range detectable by the upcoming Vera Rubin Observatory Legacy Survey of Space and Time.Comment: 28 pages, 6 figures, 6 tables, accepted by PS

Implementation and impacts of virtual team-based care planning for older persons in formal care settings: A scoping review

Objective: This scoping review aimed to summarize current knowledge about the implementation, impacts, facilitators and barriers of virtual team-based care planning for older persons in formal care settings (e.g. home and community, primary, long-term and acute care). Methods: The Joanna Briggs Institute (JBI) methodology was used. The Arksey and O’Malley and Levac, Colquhoun, and O’Brien methodologies provided additional frameworks. Databases accessed included PubMed, EMBASE, CINAHL, AgeLine, PsycInfo and Scopus. Reference lists of selected articles and grey literature retrieved through Google and Google Scholar were also reviewed. Three researchers screened titles, abstracts and conducted full-text reviews. Extracted data were mapped in a table and analysed for summative themes. Older persons and family partners assisted in interpreting findings based on their lived experiences. Results: A total of 27 studies were included. Virtual team-based care planning led to many positive outcomes for older persons (e.g. decreased depression, reduced falls and improved medication management) and their families (e.g. reduced caregiver stress and improved caregiving skills). Only four studies reported the involvement of older persons and/or families in virtual team-based care planning. Multiple barriers to adopting virtual team-based care planning were found including lack of education/training for older persons and families in using technology. Conclusion: Despite the multiple advantages that virtual team-based care planning offers for older persons and families, it is important to ensure that this care can be offered to all. There is a need to ensure that health equity is addressed to promote access to care and respond to social determinants of health

Splitting of Long-Period Comet C/2018 F4 (PANSTARRS)

Long-period comet C/2018 F4 (PANSTARRS) was observed to show duplicity of its inner region in 2020 September, suggestive of a splitting event. We here present analyses of our observations of the comet taken from the LOOK project and the University of Hawaii 2.2 m telescope after the discovery of the splitting. The two fragments Components A and B, estimated to be $\sim\!60$ m to 4 km in radius, remained highly similar to each other in terms of brightness, colour, and dust morphology throughout our observing campaign from 2020 September to 2021 December. Our fragmentation model yielded that the two components split at a relative speed of $3.00 \pm 0.18$ m s$^{-1}$ in 2020 late April, implying a specific energy change of $\left(5.3 \pm 2.8 \right) \times 10^3$ J kg$^{-1}$, and that Component B was subjected to a stronger nongravitational acceleration than Component A in both the radial and normal directions of the orbit. The obtained splitting time is broadly consistent with the result from the dust morphology analysis, which further suggested that the dominant dust grains were millimeter-sized and ejected at speed $\sim\!2$ m s$^{-1}$. We postulate that the pre-split nucleus of the comet consisted of two lobes resembling the one of 67P, or that the comet used to be a binary system like main-belt comet 288P. Regardless, we highlight the possibility of using observations of split comets as a feasible manner to study the bilobate shape or binarity fraction of cometary nuclei.Comment: Accepted to AJ for publicatio

An Optical/NIR Exploration of Forming Cluster Environments at High Redshift with VLT, Keck, and HST

The past decade has been witness to immense progress in the understanding of the early stages of cluster formation both from a theoretical and observational perspective. During this time, samples of forming clusters at higher redshift, termed "protoclusters", once comprised of heterogeneous mix of serendipitous detections or detections arising from dedicated searches around rare galaxy populations, have begun to compete with lower-redshift samples both in terms of numbers and in the homogeneity of the detection methods. Much of this progress has come from optical/near-infrared (NIR) imaging and spectroscopic campaigns designed to target large numbers of typical galaxies to exquisite depth. In this poster talk I will focus on observations from VIMOS on VLT, MOSFIRE/DEIMOS on Keck, and a 50-orbit cycle 29 HST WFC3/G141 grism campaign taken as part of the Charting Cluster Construction with VUDS and ORELSE (C3VO) survey. These observations, combined with novel mapping and search techniques, have uncovered a large number of "protostructures" at 2 < z < 5 that appear to resemble clusters and groups forming in the early universe. I will discuss the development of the methods for finding, confirming, and characterizing proto-clusters and proto-groups in our sample, as well as groups and clusters at intermediate redshifts. Several case studies of spectroscopically-confirmed massive proto-clusters with a diverse set of properties will be presented. I will finally discuss constraints on the relationship between star formation rate, stellar mass, and galaxy density at these redshift

Virtual team-based care planning with older persons in formal care settings: a scoping review protocol

Introduction COVID-19 has necessitated greater adoption of virtual care (eg, telephone (audio), videoconference) delivery models. Virtual care provides opportunities for innovative practice in care planning with older persons and meaningful family engagement by synchronously involving multiple care providers. Nevertheless, there remains a paucity of summarising evidence regarding virtual team-based care planning for older persons. The purpose of this scoping review is to summarise evidence on the utilisation of virtual team-based care planning for older persons in formal care settings. Specifically, (1) what has been reported in the literature on the impact or outcomes of virtual team-based care planning? (2) What are the facilitators and barriers to implementation? Methods and analysis This scoping review will follow a rigorous and well-established methodology by the Joanna Briggs Institute, supplemented by the Arksey & O\u27Malley and Levac, Colquhoun, & O\u27Brien frameworks. A three-step search strategy will be used to conduct a search on virtual team-based care planning for older persons in formal care settings. Keywords and index terms will be identified from an initial search in PubMed and AgeLine, and used to conduct the full search in the databases PubMed, EMBASE, CINAHL, AgeLine, PsycInfo and Scopus. Reference lists of included articles and grey literature retrieved through Google and Google Scholar will also be reviewed. Three researchers will screen titles and abstracts, and will conduct full-text review for inclusion. Extracted data will be mapped in a table. Ethics and dissemination Research ethics approval is not required for data collection from publicly accessible information. Findings will be presented at conferences, submitted for open-access publication in a peer-reviewed journal and made accessible to multiple stakeholders. The scoping review will summarise the literature on virtual team-based care planning for the purpose of informing the implementation of a virtual PIECES™ intervention (Physical/Intellectual/Emotional health, Capabilities, Environment, and Social)

Endoglycan (PODXL2) is proteolytically processed by ADAM10 (a disintegrin and metalloprotease 10) and controls neurite branching in primary neurons

Cell adhesion is tightly controlled in multicellular organisms, for example, through proteolytic ectodomain shedding of the adhesion-mediating cell surface transmembrane proteins. In the brain, shedding of cell adhesion proteins is required for nervous system development and function, but the shedding of only a few adhesion proteins has been studied in detail in the mammalian brain. One such adhesion protein is the transmembrane protein endoglycan (PODXL2), which belongs to the CD34-family of highly glycosylated sialomucins. Here, we demonstrate that endoglycan is broadly expressed in the developing mouse brains and is proteolytically shed in vitro in mouse neurons and in vivo in mouse brains. Endoglycan shedding in primary neurons was mediated by the transmembrane protease a disintegrin and metalloprotease 10 (ADAM10), but not by its homolog ADAM17. Functionally, endoglycan deficiency reduced the branching of neurites extending from primary neurons in vitro, whereas deletion of ADAM10 had the opposite effect and increased neurite branching. Taken together, our study discovers a function for endoglycan in neurite branching, establishes endoglycan as an ADAM10 substrate and suggests that ADAM10 cleavage of endoglycan may contribute to neurite branching