202 research outputs found
Risk Management in the Exchange Fund Account
In this article, author Michel Rochette of the Bank's Risk-Management Unit briefly describes the initiatives undertaken to identify, analyze, model, and manage the principal risks inherent in the transactions of the Exchange Fund Account (EFA), where the international reserves of the federal government are held. The author focuses on five types of risk: credit risk, market risk, liquidity risk, operational risk, and legal risk. In addition, the author presents the risk-management principles underlying the activities of the EFA and the governance structure of the Account.
From risk management to ERM
At one point in time, there was self-insurance. Then came risk management. Now comes the era of enterprise risk management(ERM). Traditional risk management will always be necessary, but ERM will complement existing risk activities by extending the field to cover all core risks as well as emerging and strategic opportunities, because without taking risks, organisations gain no value. This paper will present the main elements of an ERM framework and characteristics of different types of ERM.ERM, CRO, risk management, risk designation, risk framework, risk system, risk culture, governance, risk intelligence, risk capital, GIR
From risk management to ERM
At one point in time, there was self-insurance. Then came risk management. Now comes the era of enterprise risk management(ERM). Traditional risk management will always be necessary, but ERM will complement existing risk activities by extending the field to cover all core risks as well as emerging and strategic opportunities, because without taking risks, organisations gain no value.
This paper will present the main elements of an ERM framework and characteristics of different types of ERM
From risk management to ERM
At one point in time, there was self-insurance. Then came risk management. Now comes the era of enterprise risk management(ERM). Traditional risk management will always be necessary, but ERM will complement existing risk activities by extending the field to cover all core risks as well as emerging and strategic opportunities, because without taking risks, organisations gain no value.
This paper will present the main elements of an ERM framework and characteristics of different types of ERM
Personalized modeling for real-time pressure ulcer prevention in sitting posture
, Ischial pressure ulcer is an important risk for every paraplegic person and
a major public health issue. Pressure ulcers appear following excessive
compression of buttock's soft tissues by bony structures, and particularly in
ischial and sacral bones. Current prevention techniques are mainly based on
daily skin inspection to spot red patches or injuries. Nevertheless, most
pressure ulcers occur internally and are difficult to detect early. Estimating
internal strains within soft tissues could help to evaluate the risk of
pressure ulcer. A subject-specific biomechanical model could be used to assess
internal strains from measured skin surface pressures. However, a realistic 3D
non-linear Finite Element buttock model, with different layers of tissue
materials for skin, fat and muscles, requires somewhere between minutes and
hours to compute, therefore forbidding its use in a real-time daily prevention
context. In this article, we propose to optimize these computations by using a
reduced order modeling technique (ROM) based on proper orthogonal
decompositions of the pressure and strain fields coupled with a machine
learning method. ROM allows strains to be evaluated inside the model
interactively (i.e. in less than a second) for any pressure field measured
below the buttocks. In our case, with only 19 modes of variation of pressure
patterns, an error divergence of one percent is observed compared to the full
scale simulation for evaluating the strain field. This reduced model could
therefore be the first step towards interactive pressure ulcer prevention in a
daily setup. Highlights-Buttocks biomechanical modelling,-Reduced order
model,-Daily pressure ulcer prevention
A biomechanical model of the face including muscles for the prediction of deformations during speech production
A 3D biomechanical finite element model of the face is presented. Muscles are
represented by piece-wise uniaxial tension cable elements linking the insertion
points. Such insertion points are specific entities differing from nodes of the
finite element mesh, which makes possible to change either the mesh or the
muscle implementation totally independently of each other. Lip/teeth and upper
lip/lower lip contacts are also modeled. Simulations of smiling and of an
Orbicularis Oris activation are presented and interpreted. The importance of a
proper account of contacts and of an accurate anatomical description is show
Patient-Specific Finite Element Models of Posterior Pedicle Screw Fixation: Effect of Screw's Size and Geometry
Pedicle screw fixation is extensively performed to treat spine injuries or diseases and it is common for thoracolumbar fractures. Post-operative complications may arise from this surgery leading to back pain or revisions. Finite element (FE) models could be used to predict the outcomes of surgeries but should be verified when both simplified and realistic designs of screws are used. The aim of this study was to generate patient-specific Computed Tomography (CT)-based FE models of human vertebrae with two pedicle screws, verify the models, and use them to evaluate the effect of the screwsâ size and geometry on the mechanical properties of the screws-vertebra structure. FE models of the lumbar vertebra implanted with two pedicle screws were created from anonymized CT-scans of three patients. Compressive loads were applied to the head of the screws. The mesh size was optimized for realistic and simplified geometry of the screws with a mesh refinement study. Finally, the optimal mesh size was used to evaluate the sensitivity of the model to changes in screwâs size (diameter and length) and geometry (realistic or simplified). For both simplified and realistic models, element sizes of 0.6 mm in the screw and 1.0 mm in the bone allowed to obtain relative differences of approximately 5% or lower. Changes in screwâs length resulted in 4â10% differences in maximum deflection, 1â6% differences in peak stress in the screws, 10â22% differences in mean strain in the bone around the screw; changes in screwâs diameter resulted in 28â36% differences in maximum deflection, 6â27% differences in peak stress in the screws, and 30â47% differences in mean strain in the bone around the screw. The maximum deflection predicted with realistic or simplified screws correlated very well (R2 = 0.99). The peak stress in screws with realistic or simplified design correlated well (R2 = 0.82) but simplified models underestimated the peak stress. In conclusion, the results showed that the diameter of the screw has a major role on the mechanics of the screw-vertebral structure for each patient. Simplified screws can be used to estimate the mechanical properties of the implanted vertebrae, but the systematic underestimation of the peak stress should be considered when interpreting the results from the FE analyses
First Step in Theoretical Approach in Study of Mars and Titan Atmospheres with an Inductively Coupled Plasma Torch
To obtain the modelling of an ICP torch that can be used as a test case, we
have to determine all the thermodynamic properties and transport coefficients.
To calculate the data we have first to determine the composition and the
collisions integrals for all the species in the purpose to calculate the
transport coefficients. We apply the calculation to the Mars and to the Titan
atmosphere compositions. The intensities of the spectral lines are determined
versus temperature
Review of patient-specific simulations of transcatheter aortic valve implantation
International audienceTranscatheter Aortic Valve Implantation (TAVI) accounts for one of the most promising new cardiovascular procedures. This minimally invasive technique is still at its early stage and is constantly developing thanks to imaging techniques, computer science, biomechanics and technologies of prosthesis and delivery tools. As a result, patient-specific simulation can find an exciting playground in TAVI. It canexpress its potential by providing the clinicians with powerful decision support, offering great assistance in their workflow. Through a review of the current scientific field, we try to identify the challenges and future evolutions of patient-specific simulation for TAVI. This review article is an attempt to summarize and coordinate data scattered across the literature about patient-specific biomechanical simulation for TAVI
- âŠ