Convergent beam diffraction analysis of dispersoids in oxide dispersion strengthened alloys

Convergent Beam Diffraction (CBD) analysis was conducted on two of the four yttrium-aluminum oxide particles in a commercial dispersion strengthened alloy. Diffraction analysis on yttrium-aluminum garnet, YAG (5A1₂O₃ • 3Y₂O₃), and yttrium-aluminum perovskite, YAP (A1₂O₃ • Y₂O₃), indicated that diffraction effects in the High Order Laue Zones and symmetry information from the CBD patterns are extremely useful in obtaining additional information about the crystal structure from a single pattern. It was also shown that double diffraction effects in the zero layer can explain the presence of the kinematically forbidden reflections. The results of the analysis are discussed.     

Addendum: Ternary and higher order iron phase diagram updates

Phase Diagram Evaluations

Addendum: Ternary and higher order iron phase diagram updates     

Addendum ternary and higher order iron phase diagram updates

Phase Diagram Evaluations

Addendum ternary and higher order iron phase diagram updates     

Desire for euthanasia or physician-assisted suicide in palliative cancer care.

Objective: To investigate the attitudes of terminally ill individuals toward the legalization of euthanasia or physician-assisted suicide (PAS) and to identify those who would personally desire such a death. Design: In the Canadian National Palliative Care Survey, semistructured interviews were administered to 379 patients who were receiving palliative care for cancer. Patients who expressed a desire for physician-hastened death were followed prospectively. Main Outcome Measures: Attitudes toward the legalization of euthanasia or PAS were determined, as was the personal interest in receiving a hastened death. Demographic and clinical characteristics were also recorded, including a 22-item structured interview of symptoms and concerns. Results: There were 238 participants (62.8%) who believed that euthanasia and/or PAS should be legalized, and 151 (39.8%) who would consider making a future request for a physician-hastened death. However, only 22 (5.8%) reported that, if legally permissible, they would initiate such a request right away, in their current situations. This desire for hastened death was associated with lower religiosity (p = .010), reduced functional status (p = .024), a diagnosis of major depression (p     

Efficient asynchronous executions of AMR computations and visualization on a GPU system

Adaptive Mesh Refinement is a method which dynamically varies the spatio-temporal resolution of localized mesh regions in numerical simulations, based on the strength of the solution features. In-situ visualization plays an important role for analyzing the time evolving characteristics of the domain structures. Continuous visualization of the output data for various timesteps results in a better study of the underlying domain and the model used for simulating the domain. In this paper, we develop strategies for continuous online visualization of time evolving data for AMR applications executed on GPUs. We reorder the meshes for computations on the GPU based on the users input related to the subdomain that he wants to visualize. This makes the data available for visualization at a faster rate. We then perform asynchronous executions of the visualization steps and fix-up operations on the CPUs while the GPU advances the solution. By performing experiments on Tesla S1070 and Fermi C2070 clusters, we found that our strategies result in 60% improvement in response time and 16% improvement in the rate of visualization of frames over the existing strategy of performing fix-ups and visualization at the end of the timesteps.     

Phase Diagram Updates and Evaluations of the Al-Fe-P, B-Fe-U, Bi-Fe-Zn, Cu-Fe-Zn, Fe-Si-Zn and Fe-Ti-V Systems

Updates and evaluations of recent publications on the Al-Fe-P, B-Fe-U, Bi-Fe-Zn, Cu-Fe-Zn, Fe-Si-Zn and Fe-Ti-V systems are presented. Information on their phase diagrams include liquidus projections, isothermal and vertical sections, as well as crystallographic data of the phases present.     

Heating/Drying Using Particulate Medium : A Review Part I. General and Heat transfer parameters

ABSTRACT

This paper presents an Overview of particulate medium drying and heat treating of cereal grains. While the conventional air drying of grains is well documented, studies on the drying of grains using heated granular medium do not appear to exist. The scientific study of the different aspects of drying with a heated granular medium began in the early 1970's. Progress on the utilization of particle-to-particle heat transfer was slow as evidenced by the fact that there is no commercial dryer using the method as of today.

The first section of this paper deals with conduction heating and how it led to the use of granular medium in heating the grain. Starting with the earliest work on conduction heating reported by Kelly ( 1939), the developments in the heating of grain using granular media is discussed. For decades since Kelly's report, work in the subject area dealt mostly with the theoretical aspects of solid-to-solid heat transfer. Thus, in the succeeding section of the paper, heat transfer parameters and mechanisms involved in the process are thoroughly investigated.