scholarly journals David L Waltz, in Memoriam

AI Magazine ◽  
2012 ◽  
Vol 33 (4) ◽  
pp. 19
Author(s):  
Richard P. Gabriel ◽  
Tim Finin ◽  
Ron Sun
Keyword(s):  
Constraint Propagation ◽  
High Energy ◽  
3 Dimensional ◽  
Descriptive System ◽  
In Memoriam

Dave Waltz began his career of creativity and collaboration after completing his dissertation in 1972 at the MIT AI Lab. That dissertation created the field of constraint propagation by showing that constraints and a rich but simple descriptive system were sufficient to recover 3-dimensional information from a 2-dimensional projection. Besides an education, Dave picked up a passion for the high-energy atmosphere that propelled the MIT AI Lab to prominence—an atmosphere that he spent the rest of his life recreating

3-Dimensional Characterization of Polycrystalline Bulk Materials Using High-Energy Synchrotron Radiation

2007 ◽  
Vol 539-543 ◽  
pp. 2353-2358 ◽  
Author(s):  
Ulrich Lienert ◽  
Jonathan Almer ◽  
Bo Jakobsen ◽  
Wolfgang Pantleon ◽  
Henning Friis Poulsen ◽  
...  
Keyword(s):  
High Resolution ◽  
Synchrotron Radiation ◽  
High Energy ◽  
Mapping Technique ◽  
X Ray Diffraction ◽  
Bulk Materials ◽  
Reciprocal Space Mapping ◽  
3 Dimensional ◽  
Individual Grains

The implementation of 3-Dimensional X-Ray Diffraction (3DXRD) Microscopy at the Advanced Photon Source is described. The technique enables the non-destructive structural characterization of polycrystalline bulk materials and is therefore suitable for in situ studies during thermo-mechanical processing. High energy synchrotron radiation and area detectors are employed. First, a forward modeling approach for the reconstruction of grain boundaries from high resolution diffraction images is described. Second, a high resolution reciprocal space mapping technique of individual grains is presented.

3-Dimensional Characterization of Polycrystalline Bulk Materials Using High-Energy Synchrotron Radiation

2007 ◽  
pp. 2353-2358
Author(s):  
Ulrich Lienert ◽  
Jon Almer ◽  
Bo Jakobsen ◽  
Wolfgang Pantleon ◽  
Henning Friis Poulsen ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
High Energy ◽  
Bulk Materials ◽  
3 Dimensional

scholarly journals Electrodeposited Cu2Sb as anode material for 3-dimensional Li-ion microbatteries

2010 ◽  
Vol 25 (8) ◽  
pp. 1485-1491 ◽  
Author(s):  
Emilie Perre ◽  
Pierre Louis Taberna ◽  
Driss Mazouzi ◽  
Philippe Poizot ◽  
Torbjörn Gustafsson ◽  
...  
Keyword(s):  
Power Systems ◽  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Three Dimensional ◽  
Current Collector ◽  
High Energy ◽  
Mobile Technologies ◽  
3 Dimensional ◽  
Increasing Demand ◽  
Footprint Area

An increasing demand on high energy and power systems has arisen not only with the development of electric vehicle (EV), hybrid electric vehicle (HEV), telecom, and mobile technologies, but also for specific applications such as powering of microelectronic systems. To power those microdevices, an extra variable is added to the equation: a limited footprint area. Three-dimensional (3D) microbatteries are a solution to combine high-density energy and power. In this work, we present the formation of Cu2Sb onto three-dimensionally architectured arrays of Cu current collectors. Sb electrodeposition conditions and annealing post treatment are discussed in light of their influence on the morphology and battery performances. An increase of cycling stability was observed when Sb was fully alloyed with the Cu current collector. A subsequent separator layer was added to the 3D electrode when optimized. Equivalent capacity values are measured for at least 20 cycles. Work is currently devoted to the identification of the causes of capacity fading.

scholarly journals High-energy flare explosions driven by 3-dimensional X-type current loop coalescence

Solar Physics ◽  
1991 ◽  
Vol 134 (2) ◽  
pp. 329-352 ◽  
Author(s):  
Jun-Ichi Sakai ◽  
Cornelis De Jager
Keyword(s):  
High Energy ◽  
Current Loop ◽  
3 Dimensional

Recrystallization of AA1050 Studied by 3DXRD

2006 ◽  
Vol 519-521 ◽  
pp. 1569-1578
Author(s):  
Dorte Juul Jensen
Keyword(s):  
Single Crystals ◽  
High Energy ◽  
Nucleation And Growth ◽  
X Rays ◽  
X Ray Diffraction ◽  
Orientation Relationships ◽  
X Ray ◽  
3 Dimensional ◽  
Kinetics Of

By 3 dimensional X-ray diffraction (3DXRD) using high energy X-rays from synchrotron sources it is possible to study in-situ the nucleation and growth during recrystallization. In this paper it is described and discussed how 3DXRD can supplement EBSP measurements of nucleation and growth. Three types of studies are considered: i) orientation relationships between nuclei and parent deformed matrix, ii) recrystallization kinetics of individual bulk grains and iii) filming of growing grains in deformed single crystals.

scholarly journals The Disordered 3-Dimensional Structure Visualized by a Combination of High-energy Synchrotron X-rays and Computer Simulations

2005 ◽  
Vol 47 (2) ◽  
pp. 123-129
Author(s):  
Shinji KOHARA ◽  
Yasuo OHISHI ◽  
Masaki TAKATA ◽  
Yasuhiro YONEDA ◽  
Kentaro SUZUYA
Keyword(s):  
Computer Simulations ◽  
High Energy ◽  
Dimensional Structure ◽  
X Rays ◽  
3 Dimensional

Structure of Glass and Liquid Studied with a Conical Nozzle Levitation and Diffraction Technique

2007 ◽  
Vol 539-543 ◽  
pp. 2012-2017 ◽  
Author(s):  
Akitoshi Mizuno ◽  
Shinji Kohara ◽  
Seiichi Matsumura ◽  
Masahito Watanabe ◽  
J.K.R. Weber ◽  
...  
Keyword(s):  
Amorphous Materials ◽  
High Energy ◽  
Conical Nozzle ◽  
Atomic Configuration ◽  
X Ray Diffraction ◽  
Synchrotron Source ◽  
X Ray ◽  
3 Dimensional ◽  
Glass Forming ◽  
The Third

Two topics are described for structure analyses of glass and liquid using a combination of conical nozzle levitation (CNL) technique and diffraction experiments. The structure of high-purity bulk forsterite (Mg2SiO4) glass synthesized by a CNL technique has been determined by a combination of high-energy x-ray, neutron diffraction, and reverse Monte Carlo (RMC) modeling technique. The 3-dimensional atomic configuration derived from RMC modeling revealed that unusual network structure. In order to study structures of high-temperature and undercooled liquids, a CNL system has been developed and integrated with the two-axis diffractometer for glass, liquid, and amorphous materials at SPring-8, which is one of the third-generation synchrotron source. High-energy x-ray diffraction experiments were performed to obtain reliable diffraction data for the liquid phase of metallic glass-forming Zr-Cu binary alloys.

scholarly journals Reverse Monte Carlo modeling for local structures of noble metal nanoparticles using high-energy XRD and EXAFS

RSC Advances ◽  
2019 ◽  
Vol 9 (51) ◽  
pp. 29511-29521 ◽  
Author(s):  
Masafumi Harada ◽  
Risa Ikegami ◽  
Loku Singgappulige Rosantha Kumara ◽  
Shinji Kohara ◽  
Osami Sakata
Keyword(s):  
Monte Carlo ◽  
Metal Nanoparticles ◽  
High Energy ◽  
Atomic Scale ◽  
Noble Metal Nanoparticles ◽  
Reverse Monte Carlo ◽  
Monte Carlo Modeling ◽  
3 Dimensional ◽  
Local Structures ◽  
Structure Of Metal

3-Dimensional atomic-scale structure of metal nanoparticles obtained by RMC-based simulations using HEXRD and EXAFS data.

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