duc nguyen | University of Ulster (original) (raw)

Papers by duc nguyen

IEEE Transactions on Nuclear Science, 2007

Page 1. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 54, NO. 6, DECEMBER 2007 2547 Single Event Eff... more Page 1. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 54, NO. 6, DECEMBER 2007 2547 Single Event Effect Characterization of High Density Commercial NAND and NOR Nonvolatile Flash Memories Farokh Irom and Duc N. Nguyen ...

Journal of Heart and Lung Transplantation, 2000

Following lung and heart-lung transplantation, pulmonary graft failure unresponsive to aggressive... more Following lung and heart-lung transplantation, pulmonary graft failure unresponsive to aggressive conventional therapy may be fatal. Fourteen transplant recipients were placed on extracorporeal membrane oxygenation (ECMO) for pulmonary graft dysfunction. Nine patients had early (Յ 24 hours) graft failure while 5 had late (Ͼ 7 days) failure. Seven (78%) patients in the early group were weaned off ECMO and 5 (56%) survived to hospital discharge. In the late group, none of the patients could be weaned off ECMO, yielding 100% mortality. ECMO support instituted for pulmonary graft failure that occurred within 24 hours of transplantation may improve patient survival.

Annals of Thoracic Surgery, 2000

http://ats.ctsnetjournals.org/cgi/content/full/69/5/1369 on the World Wide Web at:

Annals of Thoracic Surgery, 2000

Background. Patients with acute myocardial infarction (AMI) complicated by cardiogenic shock have... more Background. Patients with acute myocardial infarction (AMI) complicated by cardiogenic shock have a high mortality rate. Current treatment modalities remain suboptimal for these patients.

Journal of Computational Physics, 2001

In this paper, we propose a new numerical method for treating two-phase incompressible flow where... more In this paper, we propose a new numerical method for treating two-phase incompressible flow where one phase is being converted into the other, e.g., the vaporization of liquid water. We consider this numerical method in the context of treating discontinuously thin flame fronts for incompressible flow. This method was designed as an extension of the Ghost Fluid Method 1999, J. Comput. Phys. 152, 457) and relies heavily on the boundary condition capturing technology developed in Liu et al. (2000, J. Comput. Phys. 154, 15) for the variable coefficient Poisson equation and in Kang et al. (in press J. Comput. Phys.) for multiphase incompressible flow. Our new numerical method admits a sharp interface representation similar to the method proposed in Helenbrook et al. (1999, J. Comput. . Since the interface boundary conditions are handled in a simple and straightforward fashion, the code is very robust, e.g. no special treatment is required to treat the merging of flame fronts. The method is presented in three spatial dimensions, with numerical examples in one, two, and three spatial dimensions.

ACM Transactions on Graphics, 2003

In this paper, we present an efficient method for simulating highly detailed large scale particip... more In this paper, we present an efficient method for simulating highly detailed large scale participating media such as the nuclear explosions shown in figure 1. We capture this phenomena by simulating the motion of particles in a fluid dynamics generated velocity field. A novel aspect of this paper is the creation of highly detailed threedimensional turbulent velocity fields at interactive rates using a low to moderate amount of memory. The key idea is the combination of two-dimensional high resolution physically based flow fields with a moderate sized three-dimensional Kolmogorov velocity field tiled periodically in space.

ACM Transactions on Graphics, 2002

We present a physically based method for modeling and animating fire. Our method is suitable for ... more We present a physically based method for modeling and animating fire. Our method is suitable for both smooth (laminar) and turbulent flames, and it can be used to animate the burning of either solid or gas fuels. We use the incompressible Navier-Stokes equations to independently model both vaporized fuel and hot gaseous products. We develop a physically based model for the expansion that takes place when a vaporized fuel reacts to form hot gaseous products, and a related model for the similar expansion that takes place when a solid fuel is vaporized into a gaseous state. The hot gaseous products, smoke and soot rise under the influence of buoyancy and are rendered using a blackbody radiation model. We also model and render the blue core that results from radicals in the chemical reaction zone where fuel is converted into products. Our method allows the fire and smoke to interact with objects, and flammable objects can catch on fire.

IEEE Transactions on Nuclear Science, 2007

Page 1. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 54, NO. 6, DECEMBER 2007 2547 Single Event Eff... more Page 1. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 54, NO. 6, DECEMBER 2007 2547 Single Event Effect Characterization of High Density Commercial NAND and NOR Nonvolatile Flash Memories Farokh Irom and Duc N. Nguyen ...

Journal of Heart and Lung Transplantation, 2000

Following lung and heart-lung transplantation, pulmonary graft failure unresponsive to aggressive... more Following lung and heart-lung transplantation, pulmonary graft failure unresponsive to aggressive conventional therapy may be fatal. Fourteen transplant recipients were placed on extracorporeal membrane oxygenation (ECMO) for pulmonary graft dysfunction. Nine patients had early (Յ 24 hours) graft failure while 5 had late (Ͼ 7 days) failure. Seven (78%) patients in the early group were weaned off ECMO and 5 (56%) survived to hospital discharge. In the late group, none of the patients could be weaned off ECMO, yielding 100% mortality. ECMO support instituted for pulmonary graft failure that occurred within 24 hours of transplantation may improve patient survival.

Annals of Thoracic Surgery, 2000

http://ats.ctsnetjournals.org/cgi/content/full/69/5/1369 on the World Wide Web at:

Annals of Thoracic Surgery, 2000

Background. Patients with acute myocardial infarction (AMI) complicated by cardiogenic shock have... more Background. Patients with acute myocardial infarction (AMI) complicated by cardiogenic shock have a high mortality rate. Current treatment modalities remain suboptimal for these patients.

Journal of Computational Physics, 2001

In this paper, we propose a new numerical method for treating two-phase incompressible flow where... more In this paper, we propose a new numerical method for treating two-phase incompressible flow where one phase is being converted into the other, e.g., the vaporization of liquid water. We consider this numerical method in the context of treating discontinuously thin flame fronts for incompressible flow. This method was designed as an extension of the Ghost Fluid Method 1999, J. Comput. Phys. 152, 457) and relies heavily on the boundary condition capturing technology developed in Liu et al. (2000, J. Comput. Phys. 154, 15) for the variable coefficient Poisson equation and in Kang et al. (in press J. Comput. Phys.) for multiphase incompressible flow. Our new numerical method admits a sharp interface representation similar to the method proposed in Helenbrook et al. (1999, J. Comput. . Since the interface boundary conditions are handled in a simple and straightforward fashion, the code is very robust, e.g. no special treatment is required to treat the merging of flame fronts. The method is presented in three spatial dimensions, with numerical examples in one, two, and three spatial dimensions.

ACM Transactions on Graphics, 2003

In this paper, we present an efficient method for simulating highly detailed large scale particip... more In this paper, we present an efficient method for simulating highly detailed large scale participating media such as the nuclear explosions shown in figure 1. We capture this phenomena by simulating the motion of particles in a fluid dynamics generated velocity field. A novel aspect of this paper is the creation of highly detailed threedimensional turbulent velocity fields at interactive rates using a low to moderate amount of memory. The key idea is the combination of two-dimensional high resolution physically based flow fields with a moderate sized three-dimensional Kolmogorov velocity field tiled periodically in space.

ACM Transactions on Graphics, 2002

We present a physically based method for modeling and animating fire. Our method is suitable for ... more We present a physically based method for modeling and animating fire. Our method is suitable for both smooth (laminar) and turbulent flames, and it can be used to animate the burning of either solid or gas fuels. We use the incompressible Navier-Stokes equations to independently model both vaporized fuel and hot gaseous products. We develop a physically based model for the expansion that takes place when a vaporized fuel reacts to form hot gaseous products, and a related model for the similar expansion that takes place when a solid fuel is vaporized into a gaseous state. The hot gaseous products, smoke and soot rise under the influence of buoyancy and are rendered using a blackbody radiation model. We also model and render the blue core that results from radicals in the chemical reaction zone where fuel is converted into products. Our method allows the fire and smoke to interact with objects, and flammable objects can catch on fire.