12 research outputs found
Review: The mental health imaginary vis-à-vis its nurses and Australian environs: An essay
No full textTo imagine what it might be like in the future for mental health nursing in Australia, one must not forget the past. Delving into the past allows for the building of a trajectory of a plausible evolution, giving insights into the imagined future. This work takes a unique exploration of the future of mental health nursing in the Australian environs. To do this, the author of this work presents an historical account of what it may have been like to be a mental health nurse in Australian in the late 1900s. This account is a philosophical view that does not necessarily aim to resolve an issue, build a theory or seek agreement, but instead is a philosophical work taking shape from the author’s lifeworld.No Full Tex
A Velocity Prediction Procedure for Sailing Yachts with a hydrodynamic Model based on integrated fully coupled RANSE-Free-Surface Simulations
No full textOne of the most important tools in today's sailing yacht design is the Velocity Prediction Program (VPP). VPPs calculate boat speed from the equilibrium of aero- and hydrodynamic flow forces. Consequently their accuracy is linked to the accuracy of the aero- and hydrodynamic data used to represent a yacht. These data are usually derived from Experimental Fluid Dynamics (EFD) or Computational Fluid Dynamics (CFD) results and processed by means of linearisation and interpolation to represent the actual sailing state of the yacht. This interpolation is a potential source of inaccuracy. Furthermore, viscosity related effects are often estimated by simplified theoretical or empirical models potentially neglecting complex physical phenomena. As an alternative, a new method is proposed and implemented, which links the hydrodynamic model directly to a RANSE flow simulation in order to avoid linearisation and interpolation errors associated with traditional VPPs. Within this method, aerodynamic sail forces are taken into account as functions of actual boat state. They are modeled using a sail force model and coupled to the hydrodynamic model via a rigid body motion solver. This way one is able to directly evaluate the hydrodynamic forces at the actual boat state of the yacht for a given wind condition. Within this work, the inherent theory and algorithms of the method are described, and the hydrodynamic model is verified and validated against experimental data from towing tank test. Based on this verification and validation of the simulation model, the functionality of the new method is illustrated by calculating VPP polars. Finally, these VPP polars are compared with results from conventional VPPs and an assessment of the method's accuracy is provided.Ship Hydrodynamics and StructuresMechanical, Maritime and Materials Engineerin
The simulation of free surface flows with Computational Fluid Dynamics
No full textComputational fluid dynamics is a powerful and versatile tool for the analysis of flow problems encountered in themaritime environment. The University of Southampton Fluid-Structure Interactions research group use ANSYS CFX tomodel a wide variety of flow problems; to gain insight into flow physics, improve designs and increase the efficiencyand safety of marine vehicles. A series of three case studies from on-going research looks at: loads applied on liquefiednatural gas tanks due to sloshing, slamming pressures experienced by high speed craft as well as the influence ofpropellers on the resistance characteristics of autonomous underwater vehicles. The presence of the free surface,complex shapes and the unsteady nature of these applications make their simulation with computational fluid dynamicsparticularly challenging. The successful validation of the computational models has resulted in the development of aselection process for suitable multiphase models as well as cost-effective meshing strategies
Does Medical Presence Decrease the Perceived Risk of Substance-Related Harm at Music Festivals? – CORRIGENDUM
No full texthttps://doi.org/10.1017/S1049023X19002656; Published by Cambridge University Press: 06 May 2019.
In the original publication of the abstract, “Does Medical Presence Decrease the Perceived Risk of Substance-Related Harm at Music Festivals?” the name of author Haddon Rabb was misspelled.1 The abstract has been corrected.No Full Tex
Towards a standardized statistical correction between RANSe-based full-scale CFD and sea trial measurement
No full textThis research considers Amels LE and SX super yachts. Bare hull, appended hull, and actuator disk simulations were performed using CFD, and compared to sea trial results. The results of the CFD are unique because they were generated after the sea trials were conducted, resulting in the ship speed in CFD and sea trial being similar. The results were compared using CF, CFD the relative error between measured sea trial and CFD computed resistance. The uncertainty was defined as a function of accuracy of precision, represented by the mean μ and standard deviation σ of CF, CFD. First, it was investigated if the uncertainty of CF, CFD could be reduced by including more physics in the simulations and what the impact of more variety in ship dimensions was. Subsequently, an investigation to the driving factors behind the uncertainty was conducted by performing a linear regression. After which it was investigated if the total uncertainty can be reduced by replacing experimental uncertainty by numerical uncertainty. Finally, a statistical correction to adjust the resistance was used to predict the power-speed relationship. Two correction factors were investigated. The first is based on the sample mean X of CF, CFD, and the second is CF, CFD derived from a CDF.It was seen that including more physics reduced the uncertainty of CF, CFD. The uncertainty decreased whilst comparing bare hull to appended hull simulations, and it increased whilst comparing appended hull to actuator disk simulations. Thus, it was concluded that the actuator disk does not lead to a more realistic simulation of the flow. More variety in the ship dimensions lead to a larger uncertainty of CF, CFD, which was expected. The variance was found to be caused by the ship speed, the mean wave height and mean wind speed, and also by the block coefficient if different ship types are considered. By computing the hull efficiency ηH numerically instead of experimentally, the total uncertainty of CF, CFD was reduced. The power-speed relationship can be predicted accurately, but not precise with CF, CFD based on X. While the prediction with a CF, CFD derived from a CDF is not accurate and not precise.Marine Technology | Ship Hydromechanic
Minimum data set for mass-gathering health research and evaluation: A discussion paper
Get PDFThis paper discusses the need for consistency in mass-gathering data collection and biomedical reporting. Mass gatherings occur frequently throughout the world, and having an understanding of the complexities of mass gatherings is important to inform health services about the possible required health resources. Factors within the environmental, psychosocial and biomedical domains influence the usage of health services at mass gatherings. The biomedical domain includes the categorization of presenting injury or illness, and rates such as patient presentation rate, transferred to hospital rate and referred to hospital rate. These rates provide insight into the usage of onsite health services, prehospital ambulance services. and hospital emergency department services.
Within the literature, these rates are reported in a manner that is varied, haphazard and author dependent. This paper proposes moving away from an author-dependent practice of collection and reporting of data. An expert consensus approach is proposed as a means of further developing mass-gathering theory and moving beyond the current situation of reporting on individual case studies. To achieve this, a minimum data set with a data dictionary is proposed in an effort to generate conversation about a possible agreed minimum amount and type of information that should be collected consistently for research and evaluation at mass gatherings. Finally, this paper outlines future opportunities that will emerge from the consistent collection and reporting of mass-gathering data, including the possibility for meta-analysis, comparison of events across societies and modeling of various rates to inform health services.No Full Tex
Membangun Karakter Anak dengan Pendidikan Keteladanan: Hikmah dari Kisah Nabi Musa dan Bani Israel Pada Surah al-Baqarah: 50-61
Get PDFAbstrakTujuan penelitian ini adalah untuk mengkaji nilai-nilai karakter yang terkandung dalam surah al-Baqarah ayat 50-61 dan penerapannya dalam pendidikan karakter anak. Kisah Nabi Musa dan Bani Israil yang diangkat dalam ayat-ayat tersebut menggambarkan pasca perjalanan Bani Israil yang memberikan hikmah yang mendalam terkait tauhid, syukur, sabar, tanggungjawab dan tawakal. Dengan pendekatan kualitatif berbasis kajian pustaka, menggunakan sumber primer berupa al-Quran dan sumber-sumber sekunder berupa kitab tafsir, buku, jurnal dan literatur lainnya. Penelitian ini mengeksplorasi nilai-nilai tersebut sebagai panduan pembentukan kepribadian anak yang berakhlak mulia. Hasil penelitian menunjukkan bahwa nilai-nilai karakter tersebut bisa diterapkan dengan menjadi suri teladan bagi anak, pembiasaan baik dan pola asuh yang konsisten, seperti menanamkan tauhid melalui pengenalan Allah, melatih rasa syukur, mengembangkan tanggungjawab dan menanamkan kesabaran dalam menghadapi tantangan. Dengan penerapan nilai-nilai tersebut diharapkan mampu membangun generasi cerdas secara intelektual, bermoral, tangguh, berakhlakul karimah dan mampu menghadapi tantangan zaman.Kata kunci: Membangun Karakter, Nabi Musa a.s dan Bani Israil, Hikmah QS. al-Baqarah ayat 50-6
In-hospital experiences of families of potential organ donors: A systematic review and qualitative synthesis
Get PDFInformation and compassion assist families of potential organ donors to make informed decisions. However, psychological implications of the in-hospital process are not well described with past research focusing on decisionmaking. To enhance understanding and improve service delivery, a systematic review was conducted. Inductive analysis and synthesis utilised Grounded Theory Methodology within a systems theory framework and contributed to a model proposing that family and staff form a System of Systems with shared responsibility for process outcomes. This model can guide evaluation and improvement of care and will be tested by means of a longitudinal study of family experiences.The
first author acknowledges that as a PhD candidate, support was
received through an Australian Government Research Training
Program Scholarshi
The development of a narrative describing the bereavement of families of potential organ donors: A systematic review
Get PDFFamilies of potential post-mortem organ donors face various challenges in the unfamiliar hospital context and after returning home. This review of sources published between 1968 and 2017 seeks to understand their journey as a bereavement experience with a number of unique features. Grief theory was used to identify ways that staff can assist family members to tolerate ambiguities and vulnerabilities while contributing to an environment characterised by compassion and social inclusion. Staff can guide families and create opportunities for meaningful participation, building resilience and developing bereavement-related skills that could assist them in the months that follow.The author(s) disclosed receipt of the following financial support
for the research, authorship, and/or publication of this article:
SGD acknowledges that as a PhD candidate, support was received
through an Australian Government Research Training Program
Scholarshi
Simulations of a self propelled autonomous underwater vehicle
Get PDFThe missions being proposed for autonomous underwater vehicles (AUVs), by both marine scientists and industry, are becoming increasingly complex and challenging. In order to meet these demands the next generation of AUVs will need to be faster, operate for longer and be more manoeuvrable than existing vehicles. It is therefore vital that the hydrodynamic forces and moments acting on a self propelled manoeuvring AUV can be predicted accurately at the initial design stage. The flow around a typical AUV is both turbulent and three dimensional with significant interactions between the hull, propeller and control surfaces. An unsteady computational fluid dynamics analysis based on the Reynolds Averaged Navier Stokes (RANS) equations is too expensive for AUV design. In order to capture the action of the propeller at an acceptable computational cost, a novel method of coupling a commercial RANS solver with a body force propeller model based on blade element momentum theory has been developed. This discretises the propeller plane into a series of radial and circumferential sectors. The local axial and tangential inflow conditions at each sector of the propeller plane can then be considered. This allows analysis of non-uniform propeller inflow conditions due to the interaction of hull, propeller and control surfaces. During a manoeuvre the hull boundary layer may separate due to the adverse pressure gradient, resulting in free vortex sheets which roll up to form a pair of body vortices. An adaptive mesh strategy is required to ensure a suitable mesh structure and density to capture these flow features. Modifications to a vortex capture algorithm (VORTFIND) are proposed, optimising it as a tool for identifying the path of vortex structures. This enables it to be used as part of an iterative meshing strategy, capturing vortical flow features more accurately and consequently their influence on the pressure loading experienced by the hull. To demonstrate the pertinence of the numerical methods developed in this work a series of case studies has been analysed. These include: determining the hydrodynamic derivatives of an AUV, propeller-rudder interaction studies, steady state manoeuvring performance of the self propelled KVLCC2, and in-service straight line performance prediction of Autosub 3. These highlight the roles of the numerical methodologies in the design process for future AUVs. The techniques developed in this work enable the designer to accurately predict the hydrodynamic loading acting on a self propelled manoeuvring AU
