ORCID Profile
0000-0002-9679-0793
Current Organisations
Macquarie University
,
University of Turku
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: American Astronomical Society
Date: 23-10-2023
Publisher: American Association for the Advancement of Science (AAAS)
Date: 03-08-2018
Abstract: Tidal disruption events (TDEs) are transient flares produced when a star is ripped apart by the gravitational field of a supermassive black hole (SMBH). We have observed a transient source in the western nucleus of the merging galaxy pair Arp 299 that radiated >1.5 × 10
Publisher: Springer Science and Business Media LLC
Date: 12-02-2022
DOI: 10.1186/S12913-022-07593-3
Abstract: Relatively little is understood about real-world provision of oncology care in ambulatory outpatient clinics (OPCs). This study aimed to: 1) develop an understanding of behaviours and practices inherent in the delivery of cancer services in OPC common areas by characterising the organisation and implementation of this care and 2) identify barriers to, and facilitators of, the delivery of this care in OPC common areas. A purpose-designed ethnographic study was employed in four public hospital OPCs. Informal field scoping activities were followed by in-situ observations, key informant interviews and document review. A view of OPCs as complex adaptive systems was used as a scaffold for the data collection and interpretation, with the intent of understanding ‘work as done’. Data were analysed using an adapted “Qualitative Rapid Appraisal, Rigorous Analysis” approach. Field observations were conducted over 135 h, interviews over 6.5 h and documents were reviewed. Analysis found six themes. Staff working in OPCs see themselves as part of small local teams and as part of a broader multidisciplinary care team. Professional role boundaries could be unclear in practice, as duties expanded to meet demand or to stop patients “falling through the cracks.” Formal care processes in OPCs were supported by relationships, social capital and informal, but invaluable, institutional expertise. Features of the clinic layout, such as the proximity of departments, affected professional interactions. Staff were aware of inter- and intra-service communication difficulties and employed strategies to minimise negative impacts on patients. We found that complexity, coordination, culture and capacity underpin the themes that characterise this care provision. The study advances understanding of how multidisciplinary care is delivered in ambulatory settings and the factors which promote or inhibit effective care practice. Time pressures, communication challenges and competing priorities can pose barriers to care delivery. OPC care is facilitated by: self-organisation of participants professional acumen institutional knowledge social ties and relationships between and within professional groups and commitment to patient-centred care. An understanding of the realities of ‘work-as-done’ may help OPCs to sustain high-quality care in the face of escalating service demand.
Publisher: BMJ
Date: 10-2019
DOI: 10.1136/BMJOPEN-2019-031179
Abstract: An understanding of the real-world provision of oncology outpatient services can help maintain service quality in the face of escalating demand and tight budgets, by informing the design of interventions that improve the effectiveness or efficiency of provision. The aims of this study are threefold. First, to develop an understanding of cancer services in outpatient clinics by characterising the organisation and practice of multidisciplinary care (MDC). Second, to explore the key areas of: (a) clinical decision-making and (b) engagement with patients’ supportive needs. Third, to identify barriers to, and facilitators of, the delivery of quality care in these settings. A suite of mixed-methods studies will be implemented at six hospitals providing cancer outpatient clinics, with a staged roll-out. In Stage One, we will examine policies, use unstructured observations and undertake interviews with key health professionals to characterise the organisation and delivery of MDC. In Stage Two, observations of practice will continue, to deepen our understanding, and to inform two focused studies. The first will explore decision-making practices and the second will examine how staff engage with patients’ needs both studies involve interviews, to complement observation. As part of the study of supportive care, we will examine the implications of an introduction of patient-reported measures (PRMs) into care, adding surveys to interviews before and after PRMs roll-out. Data analysis will account for site-specific and cross-site issues using an adapted Qualitative Rapid Appraisal, Rigorous Analysis approach. Quantitative data from clinician surveys will be statistically analysed and triangulated with the related qualitative study findings. Ethical approval was granted by South Eastern Sydney Local Health District Human Research Ethics Committee (no. 18/207). Findings will be shared with participating hospitals and widely disseminated through publications and presentations.
Publisher: Wiley
Date: 21-05-2019
DOI: 10.1111/AJCO.13166
Publisher: MDPI AG
Date: 13-07-2021
Abstract: PSR B1259-63 is a gamma-ray binary system hosting a radio pulsar orbiting around a O9.5Ve star, LS 2883, with a period of ∼3.4 years. The interaction of the pulsar wind with the LS 2883 outflow leads to unpulsed broadband emission in the radio, X-ray, GeV, and TeV domains. One of the most unusual features of the system is an outburst of GeV energies around the periastron, during which the energy release substantially exceeds the spin down luminosity under the assumption of the isotropic emission. In this paper, we present the first results of a recent multi-wavelength c aign (radio, optical, and X-ray bands) accompanied by the analysis of publicly available GeV Fermi/LAT data. The c aign covered a period of more than 100 days around the 2021 periastron and revealed substantial differences from previously observed passages. We report a major delay of the GeV flare, weaker X-ray flux during the peaks, which are typically attributed to the times when the pulsar crosses the disk, and the appearance of a third X-ray peak never observed before. We argue that these features are consistent with the emission cone model proposed by us previously, in the case of a sparser and clumpier disk of the Be star.
Publisher: MDPI AG
Date: 2022
Abstract: There are concerns that involving adolescents bereaved by suicide and other traumatic death in research may cause distress and harm. However, no study has investigated such bereaved adolescents’ research experiences. In addition, no study has looked at the experiences of parents and clinicians as participants in adolescent suicide and traumatic death bereavement research. This study aimed to explore the short-term impact of research participation experienced by adolescents, parents, and clinicians. A total of 61 participants (adolescents, n = 17 parents, n = 12 clinicians, n = 32) filled out a short survey within two weeks of having taken part in a qualitative interview study. Data were analyzed descriptively. Most participants had experienced no distress while participating and no negative effects of participating rather, participation was experienced as helpful for them and they would highly recommend participating in a study like this to others. A few adolescents and parents reported some distress, related to anxiety about participation and the unpleasantness of grief memories. The study clearly indicates that bereaved adolescents, parents and clinicians can safely participate in research interviews regarding their experiences of grief and help after suicide, generally valuing the opportunity to share their experience. To prevent and mitigate potential distress, training of research staff and implementation of appropriate participant distress protocols are imperative. Future studies could include longitudinal follow-up of participants to assess any longer-term consequences.
Publisher: Springer Science and Business Media LLC
Date: 27-05-2020
DOI: 10.1186/S13012-020-00991-3
Abstract: Clinical Practice Guidelines (CPGs) synthesize the best available evidence to guide clinician and patient decision making. There are a multitude of barriers and facilitators to clinicians adhering to CPGs however, little is known about active cancer treatment CPG adherence specifically. This systematic review sought to identify clinician attitudes, and perceived barriers and facilitators to active cancer treatment CPG adherence. A systematic search was undertaken of five databases Ovid Medline, PsychInfo, Embase, Scopus, CINAHL, and PROQUEST. The retrieved abstracts were screened for eligibility against inclusion criteria, and a full text review was conducted of all eligible studies. Data were extracted, and a quality assessment was conducted of all included studies. The qualitative papers were thematically analyzed. Attitudes, barriers, and facilitating factors extracted from the quantitative papers were categorized within the qualitative thematic framework. The search resulted in the identification of 9676 titles. After duplicates were removed, abstracts screened, and full texts reviewed, 15 studies were included. Four themes were identified which related to negative clinician attitudes and barriers to active cancer treatment CPG adherence: (1) concern over CPG content and currency of CPGs (2) concern about the evidence underpinning CPGs (3) clinician uncertainty and negative perceptions of CPGs and (4) organizational and patient factors. The review also identified four themes related to positive attitudes and facilitators to active cancer treatment CPG adherence: (5) CPG accessibility and ease of use (6) endorsement and dissemination of CPGs and adequate access to treatment facilities and resources (7) awareness of CPGs and belief in their relevance and (8) belief that CPGs support decision making, improve patient care, reduce clinical variation, and reduce costs. These results highlight that adherence to active cancer treatment CPG recommendations by oncology clinicians is influenced by multiple factors such as attitudes, practices, and access to resources. The review has also revealed many similarities and differences in the factors associated with general CPG, and active cancer treatment CPG, adherence. These findings will inform tailored implementation strategies to increase adherence to cancer treatment CPGs. PROSPERO (2019) CRD42019125748 .
No related grants have been discovered for Sergey Tsygankov.