1,282 results on '"Hawke P"'
Search Results
2. Problematic systematics in neutron-star merger simulations
- Author
-
Gittins, F., Matur, R., Andersson, N., and Hawke, I.
- Subjects
General Relativity and Quantum Cosmology ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
Next-generation gravitational-wave instruments are expected to constrain the equation of state of dense nuclear matter by observing binaries involving neutron stars. We highlight a problematic systematic error in finite-temperature merger simulations, where shock heating associated with the neutron-star surface gives rise to elevated temperatures. We demonstrate the severe implications of this artificial heating by computing static and dynamical tidal parameters for neutron stars immersed in simulation temperature profiles. The induced systematic errors must be addressed if we want to build robust gravitational-wave signal models for neutron-star, or indeed neutron star-black hole, binaries., Comment: 10 pages, 5 figures, 1 table
- Published
- 2024
3. Signatures of Low Mass Black Hole-Neutron Star Mergers
- Author
-
Matur, Rahime, Hawke, Ian, and Andersson, Nils
- Subjects
Astrophysics - High Energy Astrophysical Phenomena ,General Relativity and Quantum Cosmology - Abstract
The recent observation of the GW230529 event indicates that black hole-neutron star binaries can contain low-mass black holes. Since lower mass systems are more favourable for tidal disruption, such events are promising candidates for multi-messenger observations. In this study, we employ five finite-temperature, composition-dependent matter equations of state and present results from ten 3D general relativistic hydrodynamic simulations for the mass ratios $q = 2.6$ and $5$. Two of these simulations target the chirp mass and effective spin parameter of the GW230529 event, while the remaining eight contain slightly higher-mass black holes, including both spinning ($a_{BH} = 0.7$) and non-spinning ($a_{BH} = 0$) models. We discuss the impact of the equation of state, spin, and mass ratio on black hole-neutron star mergers by examining both gravitational-wave and ejected matter properties. For the low-mass ratio model we do not see fast-moving ejecta for the softest equation of state model, but the stiffer model produces on the order of $10^{-6}M_\odot$ of fast-moving ejecta, expected to contribute to an electromagnetic counterpart. Notably, the high-mass ratio model produces nearly the same amount of total dynamical ejecta, but yields $52$ times more fast-moving ejecta than the low-mass ratio system. In addition, we observe that the black-hole spin tends to decrease the amount of fast-moving ejecta while increasing significantly the total ejected mass. Finally, we note that the disc mass tends to increase as the neutron star compactness decreases., Comment: 9 pages, 8 Figures, 3 Tables
- Published
- 2024
4. A higher-level large-eddy filtering strategy for general relativistic fluid simulations
- Author
-
Celora, Thomas, Andersson, Nils, Hawke, Ian, Comer, Greg L., and Hatton, Marcus J.
- Subjects
Astrophysics - High Energy Astrophysical Phenomena ,General Relativity and Quantum Cosmology ,Physics - Fluid Dynamics ,Physics - Plasma Physics - Abstract
Nonlinear simulations of neutron star mergers are complicated by the need to represent turbulent dynamics. As we cannot (yet) perform simulations that resolve accurately both the gravitational-wave scale and the smallest scales at which magneto/hydrodynamic turbulence plays a role, we need to rely on approximations. Addressing this problem in the context of large-eddy models, we outline a coherent Lagrangian filtering framework that allows us to explore the many issues that arise, linking conceptual problems to practical implementations and the interpretation of the results. We develop understanding crucial for quantifying unavoidable uncertainties in current and future numerical relativity simulations and consider the implications for neutron-star parameter estimation and constraints on the equation of state of matter under extreme conditions., Comment: 15 pages, comments welcome
- Published
- 2024
5. Covariant approach to relativistic large-eddy simulations: Lagrangian filtering
- Author
-
Celora, T., Hatton, M. J., Hawke, I., and Andersson, N.
- Subjects
Astrophysics - High Energy Astrophysical Phenomena ,General Relativity and Quantum Cosmology - Abstract
We present a proof-of-principle implementation of the first fully covariant filtering scheme applied to relativistic fluid turbulence. The filtering is performed with respect to special observers, identified dynamically as moving with the "bulk of the flow". This means that filtering does not depend on foliations of spacetime but rather on the intrinsic fibration traced out by the observers. The covariance of the approach means that the results may be lifted into an arbitrary, curved spacetime. This practical step follows theoretical work showing that the residuals introduced by filtering a fine-scale ideal fluid can be represented by a non-ideal fluid prescription at the coarse scale. We interpret such non-ideal terms using a simple first-order gradient model, which allows us to extract effective turbulent viscosities and conductivity. A statistical regression on these terms shows that the majority of their variation may be explained by the thermodynamic properties of the filtered fluid and invariants of its flow, such as the shear and vorticity. This serves as a validation of the method and enables us to fit a functional, power-law form for the non-ideal coefficients -- an approach that may be used practically to give a sub-grid closure model in large-eddy simulations., Comment: 23 pages, 18 figures
- Published
- 2024
6. A dissipative extension to ideal hydrodynamics
- Author
-
Hatton, Marcus J. and Hawke, Ian
- Subjects
General Relativity and Quantum Cosmology ,Astrophysics - High Energy Astrophysical Phenomena ,Physics - Computational Physics ,Physics - Fluid Dynamics - Abstract
We present a formulation of special relativistic, dissipative hydrodynamics (SRDHD) derived from the well-established M\"uller- Israel-Stewart (MIS) formalism using an expansion in deviations from ideal behaviour. By re-summing the non-ideal terms, our approach extends the Euler equations of motion for an ideal fluid through a series of additional source terms that capture the effects of bulk viscosity, shear viscosity and heat flux. For efficiency these additional terms are built from purely spatial derivatives of the primitive fluid variables. The series expansion is parametrized by the dissipation strength and timescale coefficients, and is therefore rapidly convergent near the ideal limit. We show, using numerical simulations, that our model reproduces the dissipative fluid behaviour of other formulations. As our formulation is designed to avoid the numerical stiffness issues that arise in the traditional MIS formalism for fast relaxation timescales, it is roughly an order of magnitude faster than standard methods near the ideal limit., Comment: 16 pages, 13 figures. Intention to submit to MNRAS
- Published
- 2024
7. Turbulence modelling in neutron star merger simulations
- Author
-
Radice, David and Hawke, Ian
- Subjects
Astrophysics - High Energy Astrophysical Phenomena ,General Relativity and Quantum Cosmology - Abstract
Observations of neutron star mergers have the potential to unveil detailed physics of matter and gravity in regimes inaccessible by other experiments. Quantitative comparisons to theory and parameter estimation require nonlinear numerical simulations. However, the detailed physics of energy and momentum transfer between different scales, and the formation and interaction of small scale structures, which can be probed by detectors, are not captured by current simulations. This is where turbulence enters neutron star modelling. This review will outline the theory and current status of turbulence modelling for relativistic neutron star merger simulations., Comment: 50 pages, 13 figures. Accepted in Living Reviews in Computational Astrophysics
- Published
- 2024
8. Stable acceptance for mighty knowledge
- Author
-
Hawke, Peter
- Published
- 2024
- Full Text
- View/download PDF
9. Entangled linear polymers in fast shear: evaluation of differential tube-based modeling including flow-induced disentanglement and chain tumbling
- Author
-
Pyromali, Christina, Taghipour, Hamid, and Hawke, Laurence G. D.
- Published
- 2024
- Full Text
- View/download PDF
10. Systemic inflammation score as a predictor of death within one year after esophagectomy
- Author
-
Sato, Shinsuke, Nakatani, Eiji, Hawke, Philip, Nagai, Erina, Taki, Yusuke, Nishida, Masato, Watanabe, Masaya, Ohata, Ko, Kanemoto, Hideyuki, and Oba, Noriyuki
- Published
- 2024
- Full Text
- View/download PDF
11. Failure rates of nonoperative management of low-grade splenic injuries with active extravasation: an Eastern Association for the Surgery of Trauma multicenter study.
- Author
-
Spoor, Kristen, Cull, John, Otaibi, Banan, Hazelton, Joshua, Chipko, John, Reynolds, Jessica, Fugate, Sam, Pederson, Claire, Zier, Linda, Jacobson, Lewis, Williams, Jamie, Easterday, Thomas, Byerly, Saskya, Mentzer, Caleb, Hawke, Edward, Cullinane, Daniel, Ontengco, Julianne, Bugaev, Nikolay, LeClair, Madison, Udekwu, Pascal, Josephs, Cooper, Noorbaksh, Matthew, Babowice, James, Velopulos, Catherine, Urban, Shane, Goldenberg, Anna, Ghobrial, Gaby, Pickering, John, Quarfordt, Steven, Aunchman, Alia, LaRiccia, Aimee, Spalding, Chance, Catalano, Richard, Basham, Jordan, Edmundson, Philip, Tay, Erika, Norwood, Scott, Meadows, Katelyn, Wong, Yee, Hardman, Claire, and Nahmias, Jeffry
- Subjects
abdominal injuries ,spleen ,treatment outcome - Abstract
OBJECTIVES: There is little evidence guiding the management of grade I-II traumatic splenic injuries with contrast blush (CB). We aimed to analyze the failure rate of nonoperative management (NOM) of grade I-II splenic injuries with CB in hemodynamically stable patients. METHODS: A multicenter, retrospective cohort study examining all grade I-II splenic injuries with CB was performed at 21 institutions from January 1, 2014, to October 31, 2019. Patients >18 years old with grade I or II splenic injury due to blunt trauma with CB on CT were included. The primary outcome was the failure of NOM requiring angioembolization/operation. We determined the failure rate of NOM for grade I versus grade II splenic injuries. We then performed bivariate comparisons of patients who failed NOM with those who did not. RESULTS: A total of 145 patients were included. Median Injury Severity Score was 17. The combined rate of failure for grade I-II injuries was 20.0%. There was no statistical difference in failure of NOM between grade I and II injuries with CB (18.2% vs 21.1%, p>0.05). Patients who failed NOM had an increased median hospital length of stay (p=0.024) and increased need for blood transfusion (p=0.004) and massive transfusion (p=0.030). Five patients (3.4%) died and 96 (66.2%) were discharged home, with no differences between those who failed and those who did not fail NOM (both p>0.05). CONCLUSION: NOM of grade I-II splenic injuries with CB fails in 20% of patients. LEVEL OF EVIDENCE: IV.
- Published
- 2024
12. Collaborations between health services and educational institutions to develop research capacity in health services and health service staff: a systematic scoping review
- Author
-
Nott, Melissa, Schmidt, David, Thomas, Matt, Reilly, Kathryn, Saksena, Teesta, Kennedy, Jessica, Hawke, Catherine, and Christian, Bradley
- Published
- 2024
- Full Text
- View/download PDF
13. Radical resection of locally advanced and recurrent colorectal carcinoma involving major nerve resection: a systematic review of surgical, oncological and functional outcomes
- Author
-
Hawke, Justin A., Regora, Samantha, Rajkomar, Amrish, Heriot, Alexander, Mohan, Helen, and Warrier, Satish
- Published
- 2024
- Full Text
- View/download PDF
14. Additively manufactured, long, serpentine submillimeter channels by combining binder jet printing and liquid-phase sintering
- Author
-
Do, Truong, Suen, Hawke, Mehboudi, Aryan, Bauder, Tyler, Rudolf, Christopher, Kwon, Patrick, and Yeom, Junghoon
- Published
- 2024
- Full Text
- View/download PDF
15. Lifestyle and sociodemographic risk factors for stillbirth by region of residence in South Australia: a retrospective cohort study
- Author
-
Bowman, Anneka, Sullivan, Thomas, Makrides, Maria, Flenady, Vicki, Shepherd, Emily, Hawke, Karen, Stuart-Butler, Deanna, Leane, Cathy, and Middleton, Philippa
- Published
- 2024
- Full Text
- View/download PDF
16. Nardilysin-regulated scission mechanism activates polo-like kinase 3 to suppress the development of pancreatic cancer
- Author
-
Fu, Jie, Ling, Jianhua, Li, Ching-Fei, Tsai, Chi-Lin, Yin, Wenjuan, Hou, Junwei, Chen, Ping, Cao, Yu, Kang, Ya’an, Sun, Yichen, Xia, Xianghou, Jiang, Zhou, Furukawa, Kenei, Lu, Yu, Wu, Min, Huang, Qian, Yao, Jun, Hawke, David H., Pan, Bih-Fang, Zhao, Jun, Huang, Jiaxing, Wang, Huamin, Bahassi, E. I. Mustapha, Stambrook, Peter J., Huang, Peng, Fleming, Jason B., Maitra, Anirban, Tainer, John A., Hung, Mien-Chie, Lin, Chunru, and Chiao, Paul J.
- Published
- 2024
- Full Text
- View/download PDF
17. Fibroblast-specific PRMT5 deficiency suppresses cardiac fibrosis and left ventricular dysfunction in male mice
- Author
-
Katanasaka, Yasufumi, Yabe, Harumi, Murata, Noriyuki, Sobukawa, Minori, Sugiyama, Yuga, Sato, Hikaru, Honda, Hiroki, Sunagawa, Yoichi, Funamoto, Masafumi, Shimizu, Satoshi, Shimizu, Kana, Hamabe-Horiike, Toshihide, Hawke, Philip, Komiyama, Maki, Mori, Kiyoshi, Hasegawa, Koji, and Morimoto, Tatsuya
- Published
- 2024
- Full Text
- View/download PDF
18. How Cool is That? The Effects of Menthol Mouth Rinsing on Exercise Capacity and Performance: A Systematic Review and Meta-analysis
- Author
-
Gavel, Erica H., Barreto, Gabriel, Hawke, Kierstyn V., Stellingwerff, Trent, James, Lewis J., Saunders, Bryan, and Logan-Sprenger, Heather M.
- Published
- 2024
- Full Text
- View/download PDF
19. Care considerations in medical assistance in dying for persons with mental illness as the sole underlying medical condition: a qualitative study of patient and family perspectives
- Author
-
Stergiopoulos, Vicky, Bastidas-Bilbao, Hamer, Gupta, Mona, Buchman, Daniel Z., Stewart, Donna E., Rajji, Tarek, Simpson, Alexander I. F., van Kesteren, Mary Rose, Cappe, Vivien, Castle, David, Shields, Roslyn, and Hawke, Lisa D.
- Published
- 2024
- Full Text
- View/download PDF
20. Discussing the gaps in the science and practice of lived experience engagement in mental health and substance use research: results of knowledge mobilization activities
- Author
-
Hawke, Lisa D., Rockburne, Faith, Hiebert, Melissa, Putterman, Connie, and Sheikhan, Natasha Y.
- Published
- 2024
- Full Text
- View/download PDF
21. Supporting young people through the COVID-19 pandemic and beyond: a multi-site qualitative longitudinal study
- Author
-
Whyte, Madelyn, Nichol, Emily, Hawke, Lisa D., Wuerth, Kelli, Quinlan-Davidson, Meaghen, O’Reilly, Aileen, Duffy, Joseph, Mathias, Steve, Henderson, JL, and Barbic, Skye Pamela
- Published
- 2024
- Full Text
- View/download PDF
22. Collaborations between health services and educational institutions to develop research capacity in health services and health service staff: a systematic scoping review
- Author
-
Melissa Nott, David Schmidt, Matt Thomas, Kathryn Reilly, Teesta Saksena, Jessica Kennedy, Catherine Hawke, and Bradley Christian
- Subjects
Research capacity ,Research capability ,Collaboration ,Health service ,Partnership ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Participation of health service staff in research improves health outcomes and adherence to clinical guidelines. To increase research participation, many health services seek to build research capacity which adds to the development of individual and organisational skills and abilities in order to conduct health research. Numerous approaches to research capacity building have been trialed with inter- and intra-institutional, or university-health service collaborative approaches being frequently described strategies. University-health service research collaborations have potential for high impact and mutual benefit, by harnessing respective strengths across both organisations. However, the range and scope of research capacity building approaches, including their relative value and success have not been consolidated. The aim of this review was to examine and describe the collaborative strategies employed by health services in conjunction with educational partners to enhance the research capability of health service staff. Methods The scoping review framework by Arksey and O’Malley was used to inform the review method. A systematic search was conducted of four major databases: Medline, CINAHL, Embase, and Cochrane, focusing on publications after 1995. Inclusion and exclusion criteria were established through iterative team discussions. The two-stage screening process and data extraction was managed in Covidence. Collaboration, Research Capacity, Health Services, and Health workforce were the primary concepts, contexts and populations guiding the search. Results Of the 1462 studies identified, 61 were selected for the review. These studies reported on partnerships between universities and health services with a specific focus on building research capacity of health service staff. Studies predominantly hailed from Australia, USA, UK, and Canada. Collaboration approaches varied and leveraged different activities to build research capacity included training, mentoring, shared funding, and networking. Training partnerships emerging as the most prevalent. Findings emphasised the importance of localisation in approaches, with some studies indicating the intrinsic value of such collaborations for both partners involved. Despite the emphasis on individual interventions like training and mentoring, team-level interventions were notably scarce. Conclusion This review highlights the diverse range of approaches in research capacity building collaborations between health services and educational partners. It advocates for a shared understanding of goals, highlighting the critical nature of relationship-building and the pivotal role of sustainable infrastructure in long-term collaboration success. Future directions should consider the tangible impacts of these models on clinical outcomes.
- Published
- 2024
- Full Text
- View/download PDF
23. Supporting young people through the COVID-19 pandemic and beyond: a multi-site qualitative longitudinal study
- Author
-
Madelyn Whyte, Emily Nichol, Lisa D. Hawke, Kelli Wuerth, Meaghen Quinlan-Davidson, Aileen O’Reilly, Joseph Duffy, Steve Mathias, JL Henderson, and Skye Pamela Barbic
- Subjects
Youth ,COVID-19 pandemic ,Mental Health ,Public Health ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Throughout the COVID-19 pandemic, youth have experienced substantial stress due to abrupt changes in education, finances, and social life, compounding pre-existing stressors. With youth (ages 15–26) often at critical points in development, they are vulnerable to long-term mental health challenges brought on by pandemic trauma. Methods To identify youth experiences throughout the pandemic and examine changes over time, we conducted semi-structured interviews among n = 141 youth in two Canadian provinces (Ontario and British Columbia) and across the country of Ireland at three time points over the course of more than one year (August 2020-October 2021). We conducted a qualitative longitudinal analysis using an inductive content approach. Results Categories identified were (1) coping with hardship; (2) opportunities for growth; (3) adapting to new ways of accessing services; (4) mixed views on the pandemic: attitudes, behaviour, and perception of policy response; (5) navigating COVID-19 information; (6) transitioning to life after the pandemic; and (7) youth-led recommendations for government and service response. The findings also reveal trends in health and wellness in accordance with prolonged periods of lockdown, changes in weather, and return to normalcy after the availability of COVID-19 vaccines. Key recommendations from youth include incorporating youth voice into decision making, communicating public health information effectively to youth, enhancing service delivery post-pandemic, and planning for future pandemics. Conclusions These results provide insights into the extensive longitudinal impacts of the COVID-19 pandemic on young people across three geographical locations. Actively involving youth in decision making roles for future pandemics or public health emergencies is critical.
- Published
- 2024
- Full Text
- View/download PDF
24. An Acceptance Semantics for Stable Modal Knowledge
- Author
-
Hawke, Peter
- Subjects
Computer Science - Logic in Computer Science - Abstract
We observe some puzzling linguistic data concerning ordinary knowledge ascriptions that embed an epistemic (im)possibility claim. We conclude that it is untenable to jointly endorse both classical logic and a pair of intuitively attractive theses: the thesis that knowledge ascriptions are always veridical and a `negative transparency' thesis that reduces knowledge of a simple negated `might' claim to an epistemic claim without modal content. We motivate a strategy for answering the trade-off: preserve veridicality and (generalized) negative transparency, while abandoning the general validity of contraposition. We survey and criticize various approaches for incorporating veridicality into domain semantics, a paradigmatic `information-sensitive' framework for capturing negative transparency and, more generally, the non-classical behavior of sentences with epistemic modals. We then present a novel information-sensitive semantics that successfully executes our favored strategy: stable acceptance semantics., Comment: In Proceedings TARK 2023, arXiv:2307.04005
- Published
- 2023
- Full Text
- View/download PDF
25. Deep learning-based estimation of whole-body kinematics from multi-view images
- Author
-
Nguyen, Kien X., Zheng, Liying, Hawke, Ashley L., Carey, Robert E., Breloff, Scott P., Li, Kang, and Peng, Xi
- Subjects
Computer Science - Computer Vision and Pattern Recognition - Abstract
It is necessary to analyze the whole-body kinematics (including joint locations and joint angles) to assess risks of fatal and musculoskeletal injuries in occupational tasks. Human pose estimation has gotten more attention in recent years as a method to minimize the errors in determining joint locations. However, the joint angles are not often estimated, nor is the quality of joint angle estimation assessed. In this paper, we presented an end-to-end approach on direct joint angle estimation from multi-view images. Our method leveraged the volumetric pose representation and mapped the rotation representation to a continuous space where each rotation was uniquely represented. We also presented a new kinematic dataset in the domain of residential roofing with a data processing pipeline to generate necessary annotations for the supervised training procedure on direct joint angle estimation. We achieved a mean angle error of $7.19^\circ$ on the new Roofing dataset and $8.41^\circ$ on the Human3.6M dataset, paving the way for employment of on-site kinematic analysis using multi-view images.
- Published
- 2023
- Full Text
- View/download PDF
26. Modal Knowledge for Expressivists
- Author
-
Hawke, Peter
- Published
- 2024
- Full Text
- View/download PDF
27. Truth, topicality, and transparency: one-component versus two-component semantics
- Author
-
Hawke, Peter, Hornischer, Levin, and Berto, Francesco
- Published
- 2024
- Full Text
- View/download PDF
28. “I Think Peer Support Helps to Demystify People Who Have Mental Health Issues and Helps to Remove That Stigma”: Exploring the Defining Characteristics and Related Challenges of Youth Peer Support Through Participatory Research
- Author
-
Halsall, Tanya, Daley, Mardi, Hawke, Lisa D., Henderson, Jo, Wilson, Anne, and Matheson, Kimberly
- Published
- 2024
- Full Text
- View/download PDF
29. Contrastive inverse regression for dimension reduction
- Author
-
Hawke, Sam, Luo, Hengrui, and Li, Didong
- Subjects
Statistics - Machine Learning ,Computer Science - Machine Learning ,Statistics - Applications ,Statistics - Methodology - Abstract
Supervised dimension reduction (SDR) has been a topic of growing interest in data science, as it enables the reduction of high-dimensional covariates while preserving the functional relation with certain response variables of interest. However, existing SDR methods are not suitable for analyzing datasets collected from case-control studies. In this setting, the goal is to learn and exploit the low-dimensional structure unique to or enriched by the case group, also known as the foreground group. While some unsupervised techniques such as the contrastive latent variable model and its variants have been developed for this purpose, they fail to preserve the functional relationship between the dimension-reduced covariates and the response variable. In this paper, we propose a supervised dimension reduction method called contrastive inverse regression (CIR) specifically designed for the contrastive setting. CIR introduces an optimization problem defined on the Stiefel manifold with a non-standard loss function. We prove the convergence of CIR to a local optimum using a gradient descent-based algorithm, and our numerical study empirically demonstrates the improved performance over competing methods for high-dimensional data.
- Published
- 2023
30. Local magneto-shear instability in Newtonian gravity
- Author
-
Celora, T., Hawke, I., Andersson, N., and Comer, G. L.
- Subjects
Astrophysics - High Energy Astrophysical Phenomena ,Physics - Fluid Dynamics ,Physics - Plasma Physics - Abstract
The magneto-rotational instability (MRI) - which is due to an interplay between a sheared background and the magnetic field - is commonly considered a key ingredient for developing and sustaining turbulence in the outer envelope of binary neutron star merger remnants. To assess whether (or not) the instability is active and resolved, criteria originally derived in the accretion disk literature - thus exploiting the symmetries of such systems - are often used. In this paper we discuss the magneto-shear instability as a truly local phenomenon, relaxing common symmetry assumptions on the background on top of which the instability grows. This makes the discussion well-suited for highly dynamical environments such as binary mergers. We find that - although this is somewhat hidden in the usual derivation of the MRI dispersion relation - the instability crucially depends on the assumed symmetries. Relaxing the symmetry assumptions on the background we find that the role of the magnetic field is significantly diminished, as it affects the modes' growth but does not drive it. This suggests that we should not expect the standard instability criteria to provide a faithful indication/diagnostic of what "is actually going on" in mergers. We conclude by making contact with a suitable filtering operation, as this is key to separating background and fluctuations in highly dynamical systems.
- Published
- 2023
- Full Text
- View/download PDF
31. Additively manufactured, long, serpentine submillimeter channels by combining binder jet printing and liquid-phase sintering
- Author
-
Truong Do, Hawke Suen, Aryan Mehboudi, Tyler Bauder, Christopher Rudolf, Patrick Kwon, and Junghoon Yeom
- Subjects
Joining ,Binder jet printing ,Microchannel ,Additive manufacturing ,Depowdering ,Sintering ,Medicine ,Science - Abstract
Abstract Metallic microfluidic devices made from powder-bed additive manufacturing systems have received increasing attention, but their feasible channel geometry and complexity are often limited by lack of an effective approach to removing trapped powder particles within the channels or conduits of the sintered parts. Here, we present an innovative approach to fabricating long serpentine, high-aspect-ratio submillimeter channels made of stainless steel 316L (SS) by binder jet printing (BJP) and liquid-phase sintering. We leverage the unique nature of the BJP process, that is printing and consolidation steps are decoupled, enabling us to join two or more parts during the sintering step. Instead of constructing the channel device as a single part, we print multiple parts for easy powder removal and later join them to form enclosed channels. The key innovation lies in adding sintering additives like boron nitrides (BN) to the SS stock powder—at the SS/BN interfaces, liquid phase is locally generated at temperature much lower than the SS melting temperature, facilitating the bonding of the multiple parts as well as the consolidation of parts for near-full density. We systematically vary the sintering temperature to show how it affects the joining quality and the channel shape distortion. The joining quality such as the fracture strengths of the joined samples is measured by a pull test while the shape distortion is characterized by various imaging techniques. The feasibility of the proposed approach is demonstrated by fabricating a 400-mm-long, fully enclosed serpentine channel with a rectangular cross-section of 0.5 mm in width and 1.8 mm in height. The pressure drop across this 3D-printed SS serpentine channels is measured for air flow and compared to a standard gas flow model, showing that the device is free of leakage or clogs.
- Published
- 2024
- Full Text
- View/download PDF
32. Learning from community voices about lateral violence and lateral empowerment: a scoping review of grey literature
- Author
-
Yvonne Clark, Anneka Bowman, Rachel Elovaris, Treena Clark, Naomi Thornthwaite, Karen Peterson, Karen Hawke, and Feda Ali
- Subjects
Aboriginal ,Torres Strait Islander ,lateral violence ,lateral empowerment ,child ,youth ,Psychology ,BF1-990 - Abstract
ABSTRACTBackground Aboriginal and Torres Strait Islander youth are vulnerable to racism, trauma and Lateral Violence (LV) where negative feelings and behaviours are directed towards members within their own oppressed group. Conversely, Lateral Empowerment (LE) is the collective prevention and repair of the effects of LV and promotes resilience and strength. There is limited peer reviewed literature directly relating to LV and LE.Objective This review focuses on grey literature to gain greater insight into the understanding and experiences of LV/LE among Aboriginal and Torres Strait Islander young people within Australia.Method This grey literature scoping review identified N = 38 documents between January 1980 and September 2023 related to LV or LE to gain a greater insight into the understanding of LV and LE among the Aboriginal and Torres Strait Islander community outside of published publications.Results The results elucidated that the experience of LV for Aboriginal and Torres Strait Islander youth is largely based upon internalised racism pertaining to Aboriginal identity. Strength-based gender-specific approaches which focus upon positive cultural experiences, the use of lived experience mentors and the inclusion of family were identified as the foundation for LE.Conclusion The grey literature review highlights that the Aboriginal and Torres Strait Islander community are taking an active role in addressing and preventing LV through culturally informed practices and approaches based upon the truth telling of Australia’s colonial history. There remains the need for specific approaches directed at Aboriginal and Torres Strait Islander youth to help prevent and address LV/LE.
- Published
- 2024
- Full Text
- View/download PDF
33. ‘Is It Safe? Is it not?’ A Youth‐Led Photovoice Study of Youth Perspectives of COVID‐19 Vaccine Confidence
- Author
-
Shelby Mckee, Natasha Y. Sheikhan, Sean Patenaude, Jo Henderson, Rodney Knight, Sean A. Kidd, Skye Barbic, Aileen O'Reilly, and Lisa D. Hawke
- Subjects
co‐development ,COVID‐19 ,engagement ,mental health ,photovoice ,substance use ,Medicine (General) ,R5-920 ,Public aspects of medicine ,RA1-1270 - Abstract
ABSTRACT Background Youth have been uniquely affected by the COVID‐19 pandemic. Despite high rates of COVID‐19 infection, youth had one of the lowest vaccine uptake rates. Certain characteristics can affect vaccine uptake, such as mental health and substance use, but it is important to understand uptake for an effective response to pandemics. Objective This study examined the perspectives of youth with mental health or substance use concerns on COVID‐19 vaccine confidence, hesitancy and overall COVID‐19 vaccine perspectives. Methods Using photovoice, a community‐based participatory research method, a sample of 27 youth aged 14−24 years participated in a series of photography workshops and focus groups. Participants submitted final photographs for discussion. Focus groups were recorded, transcribed and thematically analysed. Results Four themes were generated: (1) Youth deciphered the vaccine discourse in a changing information landscape; (2) mixed perspectives of families, friends and loved ones influenced the vaccine journey; (3) complex societal influences affected views and decisions around the COVID‐19 vaccine; and (4) youth navigated their vaccine journeys through first‐ and second‐hand experiences. The four themes and subthemes highlight the evolution of youth's journeys with the COVID‐19 vaccine over the course of the pandemic and into the late‐pandemic period. Conclusions Youth with mental health or substance use challenges navigated a complex environment during the COVID‐19 pandemic. The wide variety of factors influencing vaccine perspectives should be taken into account in public health messaging and future research on youth vaccine uptake. Youth‐led and youth‐engaged research can help solicit rich and meaningful perspectives of young people on important public health issues. Patient or Public Contribution This was a youth‐led study. A youth research analyst conducted the study activities together with the support of a youth advisory group, an adult photographer with lived experience, and a scientific team.
- Published
- 2024
- Full Text
- View/download PDF
34. Systematic review of interventions for mental health, cognition and psychological well-being in long COVID
- Author
-
Wei Wang, Gillian Strudwick, Dandan Xu, Chantal F Ski, David R Thompson, Terri Rodak, Lisa D Hawke, Eric E Brown, David Castle, Anh T P Nguyen, Susan Deuville, Suzie Goulding, and Susan L Rossell
- Subjects
Psychiatry ,RC435-571 - Abstract
Aims This systematic review aims to identify and synthesise the publicly available research testing treatments for mental health, cognition and psychological well-being in long COVID.Methods The following databases and repositories were searched in October–November 2023: Medline, Embase, APA PsycINFO, Cumulative Index to Nursing and Allied Health Literature, China National Knowledge Internet, WANFANG Data, Web of Science’s Preprint Citation Index, The Cochrane Central Register of Controlled Trials, Clinicaltrials.gov and the WHO International Clinical Trials Registry Platform. Articles were selected if they described participants with long COVID symptoms at least 4 weeks after SAR-CoV-19 infection, reported primary outcomes on mental health, cognition and/or psychological well-being, and were available with at least an English-language summary. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines for systematic reviews were followed.Results Thirty-three documents representing 31 studies were included. Seven tested psychosocial interventions, five pharmaceutical interventions, three natural supplement interventions, nine neurocognitive interventions, two physical rehabilitation interventions and five integrated interventions. While some promising findings emerged from randomised controlled trials, many studies were uncontrolled; a high risk of bias and insufficient reporting were also frequent.Conclusions The published literature on treatments for mental health, cognition and psychological well-being in long COVID show that the interventions are highly heterogeneous and findings are inconclusive to date. Continued scientific effort is required to improve the evidence base. Regular literature syntheses will be required to update and educate clinicians, scientists, interventionists and the long COVID community.
- Published
- 2024
- Full Text
- View/download PDF
35. Mitohormesis during advanced stages of Duchenne muscular dystrophy reveals a redox-sensitive creatine pathway that can be enhanced by the mitochondrial-targeting peptide SBT-20
- Author
-
Meghan C. Hughes, Sofhia V. Ramos, Aditya N. Brahmbhatt, Patrick C. Turnbull, Nazari N. Polidovitch, Madison C. Garibotti, Uwe Schlattner, Thomas J. Hawke, Jeremy A. Simpson, Peter H. Backx, and Christopher GR. Perry
- Subjects
Mitochondria ,Muscle ,Antioxidant ,Respiration ,Creatine ,Small molecule therapy ,Medicine (General) ,R5-920 ,Biology (General) ,QH301-705.5 - Abstract
Mitochondrial creatine kinase (mtCK) regulates the “fast” export of phosphocreatine to support cytoplasmic phosphorylation of ADP to ATP which is more rapid than direct ATP export. Such “creatine-dependent” phosphate shuttling is attenuated in several muscles, including the heart, of the D2.mdx mouse model of Duchenne muscular dystrophy at only 4 weeks of age. However, the degree to which creatine-dependent and -independent systems of phosphate shuttling progressively worsen or potentially adapt in a hormetic manner throughout disease progression remains unknown. Here, we performed a series of proof-of-principle investigations designed to determine how phosphate shuttling pathways worsen or adapt in later disease stages in D2.mdx (12 months of age). We also determined whether changes in creatine-dependent phosphate shuttling are linked to alterations in mtCK thiol redox state. In permeabilized muscle fibres prepared from cardiac left ventricles, we found that 12-month-old male D2.mdx mice have reduced creatine-dependent pyruvate oxidation and elevated complex I-supported H2O2 emission (mH2O2). Surprisingly, creatine-independent ADP-stimulated respiration was increased and mH2O2 was lowered suggesting that impairments in the faster mtCK-mediated phosphocreatine export system resulted in compensation of the alternative slower pathway of ATP export. The apparent impairments in mtCK-dependent bioenergetics occurred independent of mtCK protein content but were related to greater thiol oxidation of mtCK and a more oxidized cellular environment (lower GSH:GSSG). Next, we performed a proof-of-principle study to determine whether creatine-dependent bioenergetics could be enhanced through chronic administration of the mitochondrial-targeting, ROS-lowering tetrapeptide, SBT-20. We found that 12 weeks of daily treatment with SBT-20 (from day 4–∼12 weeks of age) increased respiration and lowered mH2O2 only in the presence of creatine in D2.mdx mice without affecting calcium-induced mitochondrial permeability transition activity. In summary, creatine-dependent mitochondrial bioenergetics are attenuated in older D2.mdx mice in relation to mtCK thiol oxidation that seem to be countered by increased creatine-independent phosphate shuttling as a unique form of mitohormesis. Separate results demonstrate that creatine-dependent bioenergetics can also be enhanced with a ROS-lowering mitochondrial-targeting peptide. These results demonstrate a specific relationship between redox stress and mitochondrial hormetic reprogramming during dystrophin deficiency with proof-of-principle evidence that creatine-dependent bioenergetics could be modified with mitochondrial-targeting small peptide therapeutics.
- Published
- 2024
- Full Text
- View/download PDF
36. Risk factors for glioblastoma in adults in Japan: an exploratory cohort study based on the Shizuoka Kokuho Database, the Shizuoka study
- Author
-
Miyakoshi, Akinori, Ubukata, Nanako, Miyake, Hiromu, Shoji-Asahina, Aya, Dote, Hisashi, Ohata, Emi, Funaki, Daito, Ichikawa, Yoshikazu, Imaichi, Yutaro, Oshima, Michiko, Hawke, Philip, and Nakatani, Eiji
- Published
- 2024
- Full Text
- View/download PDF
37. Youth not engaged in education, employment, or training: a discrete choice experiment of service preferences in Canada
- Author
-
Meaghen Quinlan-Davidson, Mahalia Dixon, Gina Chinnery, Lisa D. Hawke, Srividya Iyer, Katherine Moxness, Matthew Prebeg, Lehana Thabane, and J. L. Henderson
- Subjects
Youth mental health and substance use ,Youth not in education ,Employment ,Or training ,Service preferences ,Discrete choice experiment ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Prior research has showed the importance of providing integrated support services to prevent and reduce youth not in education, employment, or training (NEET) related challenges. There is limited evidence on NEET youth’s perspectives and preferences for employment, education, and training services. The objective of this study was to identify employment, education and training service preferences of NEET youth. We acknowledge the deficit-based lens associated with the term NEET and use ‘upcoming youth’ to refer to this population group. Methods Canadian youth (14–29 years) who reported Upcoming status or at-risk of Upcoming status were recruited to the study. We used a discrete choice experiment (DCE) survey, which included ten attributes with three levels each indicating service characteristics. Sawtooth software was used to design and administer the DCE. Participants also provided demographic information and completed the Global Appraisal of Individual Needs–Short Screener. We analyzed the data using hierarchical Bayesian methods to determine service attribute importance and latent class analyses to identify groups of participants with similar service preferences. Results A total of n=503 youth participated in the study. 51% of participants were 24–29 years of age; 18.7% identified as having Upcoming status; 41.1% were from rural areas; and 36.0% of youth stated that they met basic needs with a little left. Participants strongly preferred services that promoted life skills, mentorship, basic income, and securing a work or educational placement. Three latent classes were identified and included: (i) job and educational services (38.9%), or services that include career counseling and securing a work or educational placement; (ii) mental health and wellness services (34.9%), or services that offer support for mental health and wellness in the workplace and free mental health and substance use services; and (iii) holistic skills building services (26.1%), or services that endorsed skills for school and job success, and life skills. Conclusions This study identified employment, education, and training service preferences among Upcoming youth. The findings indicate a need to create a service model that supports holistic skills building, mental health and wellness, and long-term school and job opportunities.
- Published
- 2024
- Full Text
- View/download PDF
38. Lifestyle and sociodemographic risk factors for stillbirth by region of residence in South Australia: a retrospective cohort study
- Author
-
Anneka Bowman, Thomas Sullivan, Maria Makrides, Vicki Flenady, Emily Shepherd, Karen Hawke, Deanna Stuart-Butler, Cathy Leane, and Philippa Middleton
- Subjects
Stillbirth ,Perinatal death ,Environment ,Pregnancy ,Reproductive health ,Risk ,Gynecology and obstetrics ,RG1-991 - Abstract
Abstract Background Stillbirth rates remain a global priority and in Australia, progress has been slow. Risk factors of stillbirth are unique in Australia due to large areas of remoteness, and limited resource availability affecting the ability to identify areas of need and prevalence of factors associated with stillbirth. This retrospective cohort study describes lifestyle and sociodemographic factors associated with stillbirth in South Australia (SA), between 1998 and 2016. Methods All restigered births in SA between 1998 ad 2016 are included. The primary outcome was stillbirth (birth with no signs of life ≥ 20 weeks gestation or ≥ 400 g if gestational age was not reported). Associations between stillbirth and lifestyle and sociodemographic factors were evaluated using multivariable logistic regression and described using adjusted odds ratios (aORs). Results A total of 363,959 births (including 1767 stillbirths) were included. Inadequate antenatal care access (assessed against the Australian Pregnancy Care Guidelines) was associated with the highest odds of stillbirth (aOR 3.93, 95% confidence interval (CI) 3.41–4.52). Other factors with important associations with stillbirth were plant/machine operation (aOR, 1.99; 95% CI, 1.16–2.45), birthing person age ≥ 40 years (aOR, 1.92; 95% CI, 1.50–2.45), partner reported as a pensioner (aOR, 1.83; 95% CI, 1.12–2.99), Asian country of birth (aOR, 1.58; 95% CI, 1.19–2.10) and Aboriginal/Torres Strait Islander status (aOR, 1.50; 95% CI, 1.20–1.88). The odds of stillbirth were increased in regional/remote areas in association with inadequate antenatal care (aOR, 4.64; 95% CI, 2.98–7.23), birthing age 35–40 years (aOR, 1.92; 95% CI, 1.02–3.64), Aboriginal and/or Torres Strait Islander status (aOR, 1.90; 95% CI, 1.12–3.21), paternal occupations: tradesperson (aOR, 1.69; 95% CI, 1.17–6.16) and unemployment (aOR, 4.06; 95% CI, 1.41–11.73). Conclusion Factors identified as independently associated with stillbirth odds include factors that could be addressed through timely access to adequate antenatal care and are likely relevant throughout Australia. The identified factors should be the target of stillbirth prevention strategies/efforts. SThe stillbirth rate in Australia is a national concern. Reducing preventable stillbirths remains a global priority.
- Published
- 2024
- Full Text
- View/download PDF
39. Nardilysin-regulated scission mechanism activates polo-like kinase 3 to suppress the development of pancreatic cancer
- Author
-
Jie Fu, Jianhua Ling, Ching-Fei Li, Chi-Lin Tsai, Wenjuan Yin, Junwei Hou, Ping Chen, Yu Cao, Ya’an Kang, Yichen Sun, Xianghou Xia, Zhou Jiang, Kenei Furukawa, Yu Lu, Min Wu, Qian Huang, Jun Yao, David H. Hawke, Bih-Fang Pan, Jun Zhao, Jiaxing Huang, Huamin Wang, E. I. Mustapha Bahassi, Peter J. Stambrook, Peng Huang, Jason B. Fleming, Anirban Maitra, John A. Tainer, Mien-Chie Hung, Chunru Lin, and Paul J. Chiao
- Subjects
Science - Abstract
Abstract Pancreatic ductal adenocarcinoma (PDAC) develops through step-wise genetic and molecular alterations including Kras mutation and inactivation of various apoptotic pathways. Here, we find that development of apoptotic resistance and metastasis of Kras G12D -driven PDAC in mice is accelerated by deleting Plk3, explaining the often-reduced Plk3 expression in human PDAC. Importantly, a 41-kDa Plk3 (p41Plk3) that contains the entire kinase domain at the N-terminus (1-353 aa) is activated by scission of the precursor p72Plk3 at Arg354 by metalloendopeptidase nardilysin (NRDC), and the resulting p32Plk3 C-terminal Polo-box domain (PBD) is removed by proteasome degradation, preventing the inhibition of p41Plk3 by PBD. We find that p41Plk3 is the activated form of Plk3 that regulates a feed-forward mechanism to promote apoptosis and suppress PDAC and metastasis. p41Plk3 phosphorylates c-Fos on Thr164, which in turn induces expression of Plk3 and pro-apoptotic genes. These findings uncover an NRDC-regulated post-translational mechanism that activates Plk3, establishing a prototypic regulation by scission mechanism.
- Published
- 2024
- Full Text
- View/download PDF
40. Whole body resistance training on functional outcomes of patients with Stage 4 or 5 chronic kidney disease: A systematic review
- Author
-
Salma Abrahim, Alexandra P. Steele, Jennifer Voth, Joan C. Krepinsky, Matthew B. Lanktree, and Thomas J. Hawke
- Subjects
exercise training ,kidney disease, chronic ,physical fitness ,resistance exercise ,systematic reviews ,weight‐lifting exercise ,Physiology ,QP1-981 - Abstract
Abstract Chronic kidney disease (CKD) causes skeletal muscle wasting, resulting in reduced function and inability to live independently. This systematic review critically appraised the scientific literature regarding the effects of full‐body resistance training on clinically‐relevant functional capacity measures in CKD. The study population included studies of people with Stage 4 or 5 CKD and a mean age of 40+ years old. Eight databases were searched for eligible studies: Pubmed, Embase, Cochrane, CINAHL, Scopus, Web of Science, MEDLINE, and AGELINE. MeSH terms and keyword combinations were used for screening following the PRISMA conduct. Inclusion criteria were based on PICO principles and no date of publication filter was applied. The intervention was training 2 days/week of structured resistance exercises using major upper and lower muscle groups. Minimum intervention period was 7 weeks. Comparison groups maintained their habitual activity without structured exercise training. Outcome measures of interest were: 6‐min walk test, grip strength, timed up‐and‐go test, and sit‐to‐stand. Eight randomized controlled trials and one nonequivalent comparison‐group study fulfilled the inclusion criteria and underwent data extraction. All studies were of hemodialysis patients. The evidence indicates that full‐body resistance exercise significantly improved grip strength, timed up and go and sit to stand tests; metrics associated with enhanced quality and quantity of life.
- Published
- 2024
- Full Text
- View/download PDF
41. LMT AMI Caused by a Valve-Like Ridge in a 9-Year-Old Boy Successfully Treated With PCI
- Author
-
Kotaro Takahashi, MD, Tomohisa Tada, MD, PhD, Mistuhiko Yahata, MD, Kiyotaka Shimamura, MD, Ryuusuke Nishikawa, MD, Philip Hawke, MA, Nobuhiro Matsuyama, MD, Junji Sakata, MD, Yasuyo Takeuchi, MD, Makoto Motooka, MD, PhD, Mizuhiko Ishigaki, MD, Sung-Hae Kim, MD, and Hiroki Sakamoto, MD
- Subjects
Acute Coronary Syndrome ,coronary angiography ,intravascular ultrasound ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
A 9-year-old boy was suspected of having acute myocardial infarction and emergency coronary angiogram was performed. No signs of flow limitation in either coronary artery was detected. We performed intravascular ultrasonography from the ascending aorta, which showed a ridge on the left main trunk acting like a valve, resulting in significant stenosis. Percutaneous coronary intervention with stent deployment was performed with good result.
- Published
- 2024
- Full Text
- View/download PDF
42. Detecting the impact of nuclear reactions on neutron star mergers through gravitational waves
- Author
-
Hammond, Peter, Hawke, Ian, and Andersson, Nils
- Subjects
Astrophysics - High Energy Astrophysical Phenomena ,General Relativity and Quantum Cosmology - Abstract
Nuclear reactions may affect gravitational-wave signals from neutron-star mergers, but the impact is uncertain. In order to quantify the effect, we compare two numerical simulations representing intuitive extremes. In one case reactions happen instantaneously. In the other case, they occur on timescales much slower than the evolutionary timescale. We show that, while the differences in the two gravitational-wave signals are small, they should be detectable by third-generation observatories. To avoid systematic errors in equation of state parameters inferred from observed signals, we need to accurately implement nuclear reactions in future simulations., Comment: 6 pages, 2 figures
- Published
- 2022
43. Fibroblast-specific PRMT5 deficiency suppresses cardiac fibrosis and left ventricular dysfunction in male mice
- Author
-
Yasufumi Katanasaka, Harumi Yabe, Noriyuki Murata, Minori Sobukawa, Yuga Sugiyama, Hikaru Sato, Hiroki Honda, Yoichi Sunagawa, Masafumi Funamoto, Satoshi Shimizu, Kana Shimizu, Toshihide Hamabe-Horiike, Philip Hawke, Maki Komiyama, Kiyoshi Mori, Koji Hasegawa, and Tatsuya Morimoto
- Subjects
Science - Abstract
Abstract Protein arginine methyltransferase 5 (PRMT5) is a well-known epigenetic regulatory enzyme. However, the role of PRMT5-mediated arginine methylation in gene transcription related to cardiac fibrosis is unknown. Here we show that fibroblast-specific deletion of PRMT5 significantly reduces pressure overload-induced cardiac fibrosis and improves cardiac dysfunction in male mice. Both the PRMT5-selective inhibitor EPZ015666 and knockdown of PRMT5 suppress α-smooth muscle actin (α-SMA) expression induced by transforming growth factor-β (TGF-β) in cultured cardiac fibroblasts. TGF-β stimulation promotes the recruitment of the PRMT5/Smad3 complex to the promoter site of α-SMA. It also increases PRMT5-mediated H3R2 symmetric dimethylation, and this increase is inhibited by Smad3 knockdown. TGF-β stimulation increases H3K4 tri-methylation mediated by the WDR5/MLL1 methyltransferase complex, which recognizes H3R2 dimethylation. Finally, treatment with EPZ015666 significantly improves pressure overload-induced cardiac fibrosis and dysfunction. These findings suggest that PRMT5 regulates TGF-β/Smad3-dependent fibrotic gene transcription, possibly through histone methylation crosstalk, and plays a critical role in cardiac fibrosis and dysfunction.
- Published
- 2024
- Full Text
- View/download PDF
44. An Integrated Care Pathway for depression in adolescents: protocol for a Type 1 Hybrid Effectiveness-implementation, Non-randomized, Cluster Controlled Trial
- Author
-
Darren B. Courtney, Melanie Barwick, Bahar Amani, Andrea T. Greenblatt, Madison Aitken, Karolin R. Krause, Brendan F. Andrade, Kathryn Bennett, Kristin Cleverley, Amanda A. Uliaszek, Claire de Oliveira, Lisa D. Hawke, Jo Henderson, Wei Wang, Priya Watson, Amy Gajaria, Amanda S. Newton, Stephanie Ameis, Jacqueline Relihan, Matthew Prebeg, Sheng Chen, and Peter Szatmari
- Subjects
Adolescent ,Depression ,Integrated care pathway ,Measurement-based care ,Implementation ,Psychiatry ,RC435-571 - Abstract
Abstract Introduction Our group developed an Integrated Care Pathway to facilitate the delivery of evidence-based care for adolescents experiencing depression called CARIBOU-2 (Care for Adolescents who Receive Information ‘Bout OUtcomes, 2nd iteration). The core pathway components are assessment, psychoeducation, psychotherapy options, medication options, caregiver support, measurement-based care team reviews and graduation. We aim to test the clinical and implementation effectiveness of the CARIBOU-2 pathway relative to treatment-as-usual (TAU) in community mental health settings. Methods and analysis We will use a Type 1 Hybrid Effectiveness-Implementation, Non-randomized Cluster Controlled Trial Design. Primary participants will be adolescents (planned n = 300, aged 13–18 years) with depressive symptoms, presenting to one of six community mental health agencies. All sites will begin in the TAU condition and transition to the CARIBOU-2 intervention after enrolling 25 adolescents. The primary clinical outcome is the rate of change of depressive symptoms from baseline to the 24-week endpoint using the Childhood Depression Rating Scale—Revised (CDRS-R). Generalized mixed effects modelling will be conducted to compare this outcome between intervention types. Our primary hypothesis is that there will be a greater rate of reduction in depressive symptoms in the group receiving the CARIBOU-2 intervention relative to TAU over 24 weeks as per the CDRS-R. Implementation outcomes will also be examined, including clinician fidelity to the pathway and its components, and cost-effectiveness. Ethics and dissemination Research ethics board approvals have been obtained. Should our results support our hypotheses, systematic implementation of the CARIBOU-2 intervention in other community mental health agencies would be indicated.
- Published
- 2024
- Full Text
- View/download PDF
45. Speaking Truth to Power: Toward a Forensic Anthropology of Advocacy and Activism
- Author
-
Donovan M. Adams, Juliette R. Bedard, Samantha H. Blatt, Eman Faisal, Jesse R. Goliath, Grace Gregory-Alcock, Ariel Gruenthal-Rankin, Patricia N. Morales Lorenzo, Ashley C. Smith, Sean D. Tallman, Rylan Tegtmeyer Hawke, and Hannah Whitelaw
- Subjects
advocacy ,activism ,forensic anthropology ,Black, Indigenous, and People of Color ,Missing and Murdered Indigenous People ,Migrant ,Anthropology ,GN1-890 ,Archaeology ,CC1-960 - Abstract
Over the years, the field of forensic anthropology has become more diverse, bringing unique perspectives to a previously homogeneous field. This diversification has been accompanied by recognizing the need for advocacy and activism in an effort to support the communities we serve: marginalized communities that are often overrepresented in the forensic population. As such, forensic anthropologists see the downstream effects of colonialism, white supremacy, inequitable policies, racism, poverty, homophobia, transphobia, gun violence, and misogyny. Some argue that advocacy and activism have no place in forensic anthropological praxis. The counterarguments for engaging in advocacy and activism uphold white, heterosexual, cisgender, and ableist privilege by arguing that perceived objectivity and unbiased perspectives are more important than personally biasing experiences and positionality that supposedly jeopardize the science and expert testimony. Advocacy and activism, however, are not new to the practice of anthropology. Whether through sociocultural anthropology, archaeology, or other areas of biological anthropology, activism and advocacy play an important role, using both the scientific method and community engagement. Using a North American approach, we detail the scope of the issues, address how advocacy and activism are perceived in the wider discipline of anthropology, and define ways in which advocacy and activism can be utilized more broadly in the areas of casework, research, and education.
- Published
- 2024
- Full Text
- View/download PDF
46. How Cool is That? The Effects of Menthol Mouth Rinsing on Exercise Capacity and Performance: A Systematic Review and Meta-analysis
- Author
-
Erica H. Gavel, Gabriel Barreto, Kierstyn V. Hawke, Trent Stellingwerff, Lewis J. James, Bryan Saunders, and Heather M. Logan-Sprenger
- Subjects
Menthol ,Mouth rinsing ,Exercise ,Capacity ,Performance ,Sports medicine ,RC1200-1245 - Abstract
Abstract Background Menthol (MEN) mouth rinsing (MR) has gained considerable interest in the athletic population for exercise performance; however, the overall magnitude of effect is unknown. Objective The aim of this systematic review and meta-analysis was to determine the efficacy of menthol MEN MR and the impact it has on exercise capacity and performance. Methods Three databases were searched with articles screened according to the inclusion/exclusion criteria. Three-level meta-analyses were used to investigate the overall efficacy of MEN MR and the impact it has on exercise capacity and performance. Meta-regressions were then performed with 1) mean VO2peak, 2) MEN swilling duration; 3) the MEN concentration of MR solution, 4) the number of executed swills throughout a single experiment, 5) the use of flavoured sweetened, non-caloric, or non-flavoured neutral solutions as controls, 6) mean environmental temperature at the time of exercise tests, and 7) exercise type as fixed factors to evaluate their influence on the effects of MEN MR. Results Ten MEN MR studies included sufficient information pertaining to MEN MR and exercise performance and capacity. MR with MEN resulted in no significant change in capacity and performance (SMD = 0.12; 95% CI − 0.08, 0.31; p = 0.23, n = 1, tau21
- Published
- 2024
- Full Text
- View/download PDF
47. Care considerations in medical assistance in dying for persons with mental illness as the sole underlying medical condition: a qualitative study of patient and family perspectives
- Author
-
Vicky Stergiopoulos, Hamer Bastidas-Bilbao, Mona Gupta, Daniel Z. Buchman, Donna E. Stewart, Tarek Rajji, Alexander I. F. Simpson, Mary Rose van Kesteren, Vivien Cappe, David Castle, Roslyn Shields, and Lisa D. Hawke
- Subjects
Medical assistance in dying ,Mental illness ,Lived experience ,Patient and family perspectives ,Canada ,Psychiatry ,RC435-571 - Abstract
Abstract Background Persons with mental illness as their sole underlying medical condition are eligible to access medical assistance in dying (MAiD) in a small number of countries, including Belgium, the Netherlands, Luxemburg and Switzerland. In Canada, it is anticipated that people experiencing mental illness as their sole underlying medical condition (MI-SUMC) will be eligible to request MAiD as of March 17th 2024. To date, few studies have addressed patient and family perspectives on MAiD MI-SUMC care processes. This study aimed to address this gap and qualitatively explore the perspectives of persons with lived experience of mental illness and family members on care considerations during MI-SUMC implementation. Methods Thirty adults with lived experience of mental illness and 25 adult family members residing in Ontario participated in this study. To facilitate participant engagement, the semi-structured interview used a persona-scenario exercise to discuss perspectives on MAiD MI-SUMC acceptability and care considerations. Framework analysis was used to inductively analyze data using NVivo 12 Pro. Steps, processes, or other care considerations suggested by the participants were charted in a framework matrix after familiarization with the narratives. Key themes were further identified. A lived-experience advisory group participated in every aspect of this study. Results Six themes were developed from the patient and family narratives: (1) Raising MAiD MI-SUMC awareness; (2) Sensitive Introduction of MAiD MI-SUMC in goals of care discussions; (3) Asking for MAiD MI-SUMC: a person-focused response; (4) A comprehensive circle of MAiD MI-SUMC care; (5) A holistic, person-centered assessment process; and (6) Need for support in the aftermath of the decision. These themes highlighted a congruence of views between patient and family members and described key desired process ingredients, including a person-centred non-judgmental stance by care providers, inter-professional holistic care, shared decision making, and the primacy of patient autonomy in healthcare decision making. Conclusions Family and patient perspectives on the implementation of MAiD MI-SUMC offer important considerations for service planning that could complement existing and emerging professional practice standards. These stakeholders’ perspectives will continue to be essential in MAiD MI-SUMC implementation efforts, to better address the needs of diverse communities and inform improvement efforts.
- Published
- 2024
- Full Text
- View/download PDF
48. Discussing the gaps in the science and practice of lived experience engagement in mental health and substance use research: results of knowledge mobilization activities
- Author
-
Lisa D. Hawke, Faith Rockburne, Melissa Hiebert, Connie Putterman, and Natasha Y. Sheikhan
- Subjects
Lived experience ,Patient-oriented research ,Research methods ,Medicine ,Medicine (General) ,R5-920 - Abstract
Abstract Background Engaging people with lived experience of mental health or substance use challenges and family members (PWLE) improves the quality and relevance of the associated research, but it can be challenging to include them meaningfully and authentically in the work. Knowledge mobilization events After reviewing the literature on the science of lived experience engagement, we held two knowledge mobilization events to translate the findings to relevant partners and collect their feedback to guide our future research. A total of 55 people attended, bringing the perspective of people with lived experience, family members, research staff, research trainees, and scientists, as well as attendees holding multiple roles. We presented the scoping review findings, then held discussions to solicit feedback and encourage the sharing of perspectives. Attendee perspectives Through small and large group discussion activities, we found that our scoping review findings resonated with the attendees’ personal experiences with engagement in mental health and substance use research. Among the gaps highlighted in the discussions, the two that were most emphasized were the critical importance of improving diversity in engagement work in mental health and substance use, and the importance of addressing gaps around communication, relationships, rapport, and power dynamics in engagement spaces. Conclusions Diversity, communication, relationships, and power dynamics emerge as key areas of work needed in the near future to advance the science of PWLE engagement in mental health and substance use research. We commit to pursuing the work that is considered of greatest need by a range of partners this research engagement sphere. We call on researchers in this area to continue this line of work, with a focus on the areas of research identified by attendees.
- Published
- 2024
- Full Text
- View/download PDF
49. Tumor-Induced Osteomalacia in a Patient with Crohn’s Disease: A Case Report and Approach to Investigating Hypophosphatemia
- Author
-
Kate Hawke, Anthony Croft, and Syndia Lazarus
- Subjects
hypophosphatemia ,inflammatory bowel diseases ,crohn’s disease ,metabolic bone diseases ,case report ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Introduction: Hypophosphatemia occurs commonly in inflammatory bowel disease (IBD) patients and can cause considerable morbidity. The differential diagnoses in IBD include nutritional causes and hypophosphatemia induced by some formulations of intravenous iron infusions. Case Presentation: We present the case of a 37-year-old man with active Crohn’s disease, presenting with difficulty walking and fractures of the vertebrae and calcaneus. He had long-standing hypophosphatemia. Nutritional causes for hypophosphatemia were considered in the first instance given the presence of chronic diarrhea and vitamin D deficiency; however, there was minimal response to appropriate supplementation with oral phosphorous and vitamin D. Iron infusion-induced hypophosphatemia was then considered, but the nadir phosphate level preceded any iron infusion. Therefore, work-up was undertaken for less common causes. He was ultimately diagnosed with tumor-induced osteomalacia, caused by excess fibroblast growth factor 23 (FGF23) secretion from a phosphaturic mesenchymal tumor about the knee. He had complete resolution of symptoms and biochemical abnormalities following successful resection of the tumor. Conclusion: This case illustrates the approach to investigation of hypophosphatemia in IBD patients. If the time course and response to phosphate supplementation are not as expected for nutritional or iron infusion-induced hypophosphatemia, less common causes should be considered.
- Published
- 2024
- Full Text
- View/download PDF
50. Formulating bulk viscosity for neutron star simulations
- Author
-
Celora, T., Hawke, I., Hammond, P. C., Andersson, N., and Comer, G. L.
- Subjects
Astrophysics - High Energy Astrophysical Phenomena ,General Relativity and Quantum Cosmology ,High Energy Physics - Phenomenology ,Nuclear Theory - Abstract
In order to extract the precise physical information encoded in the gravitational and electromagnetic signals from powerful neutron-star merger events, we need to include as much of the relevant physics as possible in our numerical simulations. This presents a severe challenge, given that many of the involved parameters are poorly constrained. In this paper we focus on the role of nuclear reactions. Combining a theoretical discussion with an analysis connecting to state-of-the-art simulations, we outline multiple arguments that lead to a reactive system being described in terms of a bulk viscosity. The results demonstrate that in order to properly account for nuclear reactions, future simulations must be able to handle different regimes where rather different assumptions/approximations are appropriate. We also touch upon the link to models based on the large-eddy-strategy required to capture turbulence., Comment: final version published in Phys. Rev. D
- Published
- 2022
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.