The Experts below are selected from a list of 57852 Experts worldwide ranked by ideXlab platform
Ayman Mohamed Fawzi Elrefaie - One of the best experts on this subject based on the ideXlab platform.
-
fractional slot concentrated windings synchronous permanent magnet machines opportunities and challenges
IEEE Transactions on Industrial Electronics, 2010Co-Authors: Ayman Mohamed Fawzi ElrefaieAbstract:Fractional-slot concentrated-winding (FSCW) synchronous permanent magnet (PM) machines have been gaining interest over the last few years. This is mainly due to the several advantages that this type of windings provides. These include high-power density, high efficiency, short end turns, high slot fill factor particularly when coupled with segmented stator structures, low cogging torque, flux-weakening Capability, and fault tolerance. This paper is going to provide a thorough analysis of FSCW synchronous PM machines in terms of opportunities and challenges. This paper will cover the theory and design of FSCW synchronous PM machines, achieving high-power density, flux-weakening Capability, Comparison of single- versus double-layer windings, fault-tolerance rotor losses, parasitic effects, Comparison of interior versus surface PM machines, and various types of machines. This paper will also provide a summary of the commercial applications that involve FSCW synchronous PM machines.
Andoni Toms - One of the best experts on this subject based on the ideXlab platform.
-
Capability: Comparison of the JOURNEY II Bi-Cruciate Stabilised and GENESIS II total knee arthroplasty in performance and functional ability: protocol of a randomised controlled trial
Trials, 2020Co-Authors: Celia Clarke, Valerie Pomeroy, Allan Clark, Graham Creelman, Nicola Hancock, Simon Horton, Anne Killett, Charles Mann, Estelle Payerne, Andoni TomsAbstract:Background Osteoarthritis of the knee is a common condition that is expected to rise in the next two decades leading to an associated increase in total knee replacement (TKR) surgery. Although there is little debate regarding the safety and efficacy of modern TKR, up to 20% of patients report poor functional outcomes following surgery. This study will investigate the functional outcome of two TKRs; the JOURNEY II Bi-Cruciate Stabilised knee arthroplasty, a newer knee prosthesis designed to provide guided motion and improve knee kinematics by more closely approximating a normal knee, and the GENESIS II, a proven existing design. Aim To compare the change in Patient-reported Outcome Measures (PROMs) scores of the JOURNEY II BCS and the GENESIS II from pre-operation to 6 months post operation. Methods Capability is a pragmatic, blinded, two-arm parallel, randomised controlled trial recruiting patients with primary osteoarthritis due to have unilateral TKR surgery across two UK hospitals. Eligible participants ( n = 80) will be randomly allocated to receive either the JOURNEY II or the GENESIS II BCS knee prosthesis. Baseline measures will be taken prior to surgery. Patients will be followed at 1 week, 6 to 8 weeks and 6 months post-operatively. The primary outcome is the Oxford Knee Score (OKS) at 6 months post-operatively. Secondary outcomes include: other PROMs, biomechanical, radiological (computerised tomography, (CT)), clinical efficacy and safety outcomes. An embedded qualitative study will also investigate patients’ perspectives via interview pre and post surgery on variables known to affect the outcome of TKR surgery. A sub-sample ( n = 30) will have additional in-depth interviews to explore the themes identified. The surgeons’ perspectives on the operation will be investigated by a group interview after all participants have undergone surgery. Discussion This trial will evaluate two generations of TKR using PROMS, kinematic and radiological analyses and qualitative outcomes from the patient perspective. Trial registration International Standard Randomised Controlled Trials Number Registration, ID: ISRCTN32315753 . Registered on 12 December 2017.
-
Capability: Comparison of the JOURNEY II Bi-Cruciate Stabilised and GENESIS II total knee arthroplasty in performance and functional ability: protocol of a randomised controlled trial.
Trials, 2020Co-Authors: Celia Clarke, Allan Clark, Graham Creelman, Nicola Hancock, Simon Horton, Anne Killett, Charles Mann, Estelle Payerne, Valerie M. Pomeroy, Andoni TomsAbstract:Osteoarthritis of the knee is a common condition that is expected to rise in the next two decades leading to an associated increase in total knee replacement (TKR) surgery. Although there is little debate regarding the safety and efficacy of modern TKR, up to 20% of patients report poor functional outcomes following surgery. This study will investigate the functional outcome of two TKRs; the JOURNEY II Bi-Cruciate Stabilised knee arthroplasty, a newer knee prosthesis designed to provide guided motion and improve knee kinematics by more closely approximating a normal knee, and the GENESIS II, a proven existing design. To compare the change in Patient-reported Outcome Measures (PROMs) scores of the JOURNEY II BCS and the GENESIS II from pre-operation to 6 months post operation. Capability is a pragmatic, blinded, two-arm parallel, randomised controlled trial recruiting patients with primary osteoarthritis due to have unilateral TKR surgery across two UK hospitals. Eligible participants (n = 80) will be randomly allocated to receive either the JOURNEY II or the GENESIS II BCS knee prosthesis. Baseline measures will be taken prior to surgery. Patients will be followed at 1 week, 6 to 8 weeks and 6 months post-operatively. The primary outcome is the Oxford Knee Score (OKS) at 6 months post-operatively. Secondary outcomes include: other PROMs, biomechanical, radiological (computerised tomography, (CT)), clinical efficacy and safety outcomes. An embedded qualitative study will also investigate patients’ perspectives via interview pre and post surgery on variables known to affect the outcome of TKR surgery. A sub-sample (n = 30) will have additional in-depth interviews to explore the themes identified. The surgeons’ perspectives on the operation will be investigated by a group interview after all participants have undergone surgery. This trial will evaluate two generations of TKR using PROMS, kinematic and radiological analyses and qualitative outcomes from the patient perspective. International Standard Randomised Controlled Trials Number Registration, ID: ISRCTN32315753. Registered on 12 December 2017.
-
Capability: Comparison of the JOURNEY II Bi-Cruciate Stabilised and GENESIS II total knee arthroplasty in performance and functional ability: protocol of a randomised controlled trial.
2019Co-Authors: Celia Clarke, Valerie Pomeroy, Allan Clark, Graham Creelman, Nicola Hancock, Simon Horton, Anne Killett, Charles Mann, Estelle Payerne, Andoni TomsAbstract:Abstract Background: Osteoarthritis of the knee is a common condition that is expected to rise in the next two decades leading to an associated increase in total knee replacement (TKR) surgery. Although there is little debate regarding the safety and efficacy of modern TKR, up to 20% of patients report poor functional outcomes following surgery. This study will investigate the functional outcome of two TKR; the JOURNEY II Bi Cruciate Stabilised knee, a newer prosthesis designed to provide guided motion and improve knee kinematics by more closely approximating a normal knee and the GENESIS II, a proven existing design. Aim: To compare the change in patient reported outcome scores of the JOURNEY II BCS and the GENESIS II from pre-operation to six months post-operation. Methods : Capability is a pragmatic, blinded, two-arm parallel, randomised controlled trial recruiting patients with primary osteoarthritis due to have unilateral TKR surgery across two UK hospitals. Eligible participants (n=80) will be randomly allocated to receive either the JOURNEY II or the GENESIS II BCS knee prosthesis. Baseline measures will be taken prior to surgery. Patients will be followed at one week, six to eight weeks and six months post-operatively. Primary outcome is the Oxford Knee Score (OKS) at six months post-operatively. Secondary outcomes include: other patient-reported outcome measures (PROMs), biomechanical, radiological (computerised tomography, (CT)), clinical efficacy and safety outcomes. An embedded qualitative study will also investigate patients’ perspectives via interview pre- and post-surgery on variables known to affect the outcome of TKR surgery. A sub-sample (n=30) will have additional in-depth interviews to explore themes identified. The surgeons’ perspectives on the operation will be investigated by a group interview after all participants have undergone surgery. Discussion : This trial will evaluate two generations of TKR using PROMS, kinematic and radiological analyses and qualitative outcomes from the patient perspective.
M Marchetti - One of the best experts on this subject based on the ideXlab platform.
-
x band microwave characterization of carbon based nanocomposite material absorption Capability Comparison and ras design simulation
Composites Science and Technology, 2010Co-Authors: Davide Micheli, Carmelo Apollo, R Pastore, M MarchettiAbstract:Abstract This paper presents a microwave characterization of several carbon-based composite materials interesting the future aircraft/aerospace systems. They consist in epoxy resin reinforced with five different carbon species: micro-sized granular graphite, fullerenes, carbon nanofibers, single- and multi-walled carbon nanotubes. Main goal of this work is to show how carbon inclusions size and geometry are able to significantly modify the electromagnetic properties at microwave frequencies. Microwave characterization is performed in terms of microwave permittivity and intrinsic wave impedance evaluation; all the computations are based on microwave scattering parameters measured in the X-band (8.2/12.4 GHz) by waveguide method. A theoretical analysis of the microwave absorbing Capability is then performed assuming that a multilayer of nanocomposite material was backed on a conductor plate (such a structure is typically called Radar Absorbing Material). The results obtained for the reflection coefficient indicate that nanoparticles give better absorption properties to the matrix than micro-sized ones: nanocomposite materials could thus be used successfully as microwave absorbers, not only for their absorption performances but also for their light weight.
P.l. Mondino - One of the best experts on this subject based on the ideXlab platform.
-
ITER Plasma Shaping Capability: Comparison of Alternative Magnetic Configurations ITER Joint Central Team and Home Teams presented by
1998Co-Authors: P.l. MondinoAbstract:During the last two years four different Poloidal Field configurations have been analyzed in detail and compared. All configurations studied were more or less equivalent from the point of view of plasma performance, two were ruled out for mechanical problems. The FF system, selected as reference, has nine PF coils, all using NhTi superconductors. I. INTRODUCTION Since the Outline Design Report, a characteristic feature of the ITER EDA Design is the layer wound Central Solenoid (CS), with four conductors in hand, under compression from the TF coils. The imain advantage of this solution is a structurally integrated and compact design: to this purpose the CS has to be as long as the straight portion of the Toroidal Field (TF) coils. The current density, in the CS, is vertically uniform; radially, three different conductors are used: high, medium and low grade for decreasing magnetic field and therefore increasing cirrent density. This approach allows the linked flux to be incrc:ased. Both TF and CS conductors are made of Nb3Sn. The disadvantages of this design include certain limitations to plasma shaping and the requirement on the CS power supply to interrupt currents of about 170 kA at plasma initiation and for quench protection. To improve the design, alternative Poloidal Field (PF) configurations have been the subject of intensive studies for the last two years. This paper reports the two main alternatives and compares their plasma shaping capabilities with the configuration presented in the Detailed Design Report (DDR) and that chosen for the Final Design Report (FDR), respectively. The results presented in this paper are based on th'e analysis provided by the JCT, the US Home Team ( 11 and the JA Home Team (2).
-
ITER plasma shaping Capability: Comparison of alternative magnetic configurations
17th IEEE NPSS Symposium Fusion Engineering (Cat. No.97CH36131), 1997Co-Authors: P.l. MondinoAbstract:During the last two years four different Poloidal Field configurations have been analyzed in detail and compared. All configurations studied were more or less equivalent from the point of view of plasma performance, two were ruled out for mechanical problems. The PF system, selected as reference, has nine PF coils, all using NbTi superconductors.
Celia Clarke - One of the best experts on this subject based on the ideXlab platform.
-
Capability: Comparison of the JOURNEY II Bi-Cruciate Stabilised and GENESIS II total knee arthroplasty in performance and functional ability: protocol of a randomised controlled trial
Trials, 2020Co-Authors: Celia Clarke, Valerie Pomeroy, Allan Clark, Graham Creelman, Nicola Hancock, Simon Horton, Anne Killett, Charles Mann, Estelle Payerne, Andoni TomsAbstract:Background Osteoarthritis of the knee is a common condition that is expected to rise in the next two decades leading to an associated increase in total knee replacement (TKR) surgery. Although there is little debate regarding the safety and efficacy of modern TKR, up to 20% of patients report poor functional outcomes following surgery. This study will investigate the functional outcome of two TKRs; the JOURNEY II Bi-Cruciate Stabilised knee arthroplasty, a newer knee prosthesis designed to provide guided motion and improve knee kinematics by more closely approximating a normal knee, and the GENESIS II, a proven existing design. Aim To compare the change in Patient-reported Outcome Measures (PROMs) scores of the JOURNEY II BCS and the GENESIS II from pre-operation to 6 months post operation. Methods Capability is a pragmatic, blinded, two-arm parallel, randomised controlled trial recruiting patients with primary osteoarthritis due to have unilateral TKR surgery across two UK hospitals. Eligible participants ( n = 80) will be randomly allocated to receive either the JOURNEY II or the GENESIS II BCS knee prosthesis. Baseline measures will be taken prior to surgery. Patients will be followed at 1 week, 6 to 8 weeks and 6 months post-operatively. The primary outcome is the Oxford Knee Score (OKS) at 6 months post-operatively. Secondary outcomes include: other PROMs, biomechanical, radiological (computerised tomography, (CT)), clinical efficacy and safety outcomes. An embedded qualitative study will also investigate patients’ perspectives via interview pre and post surgery on variables known to affect the outcome of TKR surgery. A sub-sample ( n = 30) will have additional in-depth interviews to explore the themes identified. The surgeons’ perspectives on the operation will be investigated by a group interview after all participants have undergone surgery. Discussion This trial will evaluate two generations of TKR using PROMS, kinematic and radiological analyses and qualitative outcomes from the patient perspective. Trial registration International Standard Randomised Controlled Trials Number Registration, ID: ISRCTN32315753 . Registered on 12 December 2017.
-
Capability: Comparison of the JOURNEY II Bi-Cruciate Stabilised and GENESIS II total knee arthroplasty in performance and functional ability: protocol of a randomised controlled trial.
Trials, 2020Co-Authors: Celia Clarke, Allan Clark, Graham Creelman, Nicola Hancock, Simon Horton, Anne Killett, Charles Mann, Estelle Payerne, Valerie M. Pomeroy, Andoni TomsAbstract:Osteoarthritis of the knee is a common condition that is expected to rise in the next two decades leading to an associated increase in total knee replacement (TKR) surgery. Although there is little debate regarding the safety and efficacy of modern TKR, up to 20% of patients report poor functional outcomes following surgery. This study will investigate the functional outcome of two TKRs; the JOURNEY II Bi-Cruciate Stabilised knee arthroplasty, a newer knee prosthesis designed to provide guided motion and improve knee kinematics by more closely approximating a normal knee, and the GENESIS II, a proven existing design. To compare the change in Patient-reported Outcome Measures (PROMs) scores of the JOURNEY II BCS and the GENESIS II from pre-operation to 6 months post operation. Capability is a pragmatic, blinded, two-arm parallel, randomised controlled trial recruiting patients with primary osteoarthritis due to have unilateral TKR surgery across two UK hospitals. Eligible participants (n = 80) will be randomly allocated to receive either the JOURNEY II or the GENESIS II BCS knee prosthesis. Baseline measures will be taken prior to surgery. Patients will be followed at 1 week, 6 to 8 weeks and 6 months post-operatively. The primary outcome is the Oxford Knee Score (OKS) at 6 months post-operatively. Secondary outcomes include: other PROMs, biomechanical, radiological (computerised tomography, (CT)), clinical efficacy and safety outcomes. An embedded qualitative study will also investigate patients’ perspectives via interview pre and post surgery on variables known to affect the outcome of TKR surgery. A sub-sample (n = 30) will have additional in-depth interviews to explore the themes identified. The surgeons’ perspectives on the operation will be investigated by a group interview after all participants have undergone surgery. This trial will evaluate two generations of TKR using PROMS, kinematic and radiological analyses and qualitative outcomes from the patient perspective. International Standard Randomised Controlled Trials Number Registration, ID: ISRCTN32315753. Registered on 12 December 2017.
-
Capability: Comparison of the JOURNEY II Bi-Cruciate Stabilised and GENESIS II total knee arthroplasty in performance and functional ability: protocol of a randomised controlled trial.
2019Co-Authors: Celia Clarke, Valerie Pomeroy, Allan Clark, Graham Creelman, Nicola Hancock, Simon Horton, Anne Killett, Charles Mann, Estelle Payerne, Andoni TomsAbstract:Abstract Background: Osteoarthritis of the knee is a common condition that is expected to rise in the next two decades leading to an associated increase in total knee replacement (TKR) surgery. Although there is little debate regarding the safety and efficacy of modern TKR, up to 20% of patients report poor functional outcomes following surgery. This study will investigate the functional outcome of two TKR; the JOURNEY II Bi Cruciate Stabilised knee, a newer prosthesis designed to provide guided motion and improve knee kinematics by more closely approximating a normal knee and the GENESIS II, a proven existing design. Aim: To compare the change in patient reported outcome scores of the JOURNEY II BCS and the GENESIS II from pre-operation to six months post-operation. Methods : Capability is a pragmatic, blinded, two-arm parallel, randomised controlled trial recruiting patients with primary osteoarthritis due to have unilateral TKR surgery across two UK hospitals. Eligible participants (n=80) will be randomly allocated to receive either the JOURNEY II or the GENESIS II BCS knee prosthesis. Baseline measures will be taken prior to surgery. Patients will be followed at one week, six to eight weeks and six months post-operatively. Primary outcome is the Oxford Knee Score (OKS) at six months post-operatively. Secondary outcomes include: other patient-reported outcome measures (PROMs), biomechanical, radiological (computerised tomography, (CT)), clinical efficacy and safety outcomes. An embedded qualitative study will also investigate patients’ perspectives via interview pre- and post-surgery on variables known to affect the outcome of TKR surgery. A sub-sample (n=30) will have additional in-depth interviews to explore themes identified. The surgeons’ perspectives on the operation will be investigated by a group interview after all participants have undergone surgery. Discussion : This trial will evaluate two generations of TKR using PROMS, kinematic and radiological analyses and qualitative outcomes from the patient perspective.