Magneto-Thermo-Fluidic (MTF) MEMS by Direct-Write (DW) Laser Micro-Fabrication (LμF)

2000 ◽  
Author(s):  
George P. Vakanas ◽  
Ampere A. Tseng ◽  
Paul Winer
Keyword(s):  
High Volume ◽  
Magnetic Films ◽  
Direct Write ◽  
State University ◽  
Mems Devices ◽  
Arizona State University ◽  
Research Activity ◽  
Micro Fabrication ◽  
Laser Fabrication ◽  
Processing Techniques

Abstract Keeping up with the highlight topic of this year’s ASME MEMS Symposium 2000 “Beyond Traditional Barriers”, this paper reports on operational principles, scaling, modeling and fabrication issues for magneto-fluidic MEMS. The research is an integral part of the on-going Laser Fabrication Program at Arizona State University. It is the premise of this paper that novel MEMS devices and applications can evolve by integrating materials with unique properties in new micro device designs (Grimes, 1997). Laser processing techniques, for 5μ-thick magnetic films on silicon, have already been reported elsewhere by the same authors (Vakanas et al, 2000). The focus of the current work is on expanding the applications envelop of laser-fabricated microstructures on magnetic thick films to enable new high-volume semiconductor and MEMS devices. Research results are presented in the form of preliminary laser-based rapid prototyping and fabrication (RP&F) as well as comparative taxonomies of operational principles and applications in microfluidics and micromagnetics, leading to the conceptual design of micro and meso -scale MHD and MTF devices. The paper concludes with the on-going research activity and remaining challenges.

Evaluation of the Effect of Lime Modification on the Dynamic Modulus Stiffness of Hot-Mix Asphalt

2005 ◽  
Vol 1929 (1) ◽  
pp. 10-19 ◽  
Author(s):  
Javed Bari ◽  
Matthew W. Witczak
Keyword(s):  
Dynamic Modulus ◽  
Hot Mix Asphalt ◽  
High Volume ◽  
Hydrated Lime ◽  
Standard Test ◽  
Pavement Design ◽  
State University ◽  
Arizona State University ◽  
Design Guide ◽  
Pavement Structures

Hydrated lime is often used as a mineral filler or antistripping additive in hot-mix asphalt (HMA). Many agencies across North America require the use of lime in all HMA mixtures being placed on high-volume roadways. Despite this wide use of lime, its effects on the HMA mixture dynamic modulus (E*) stiffness have rarely been evaluated. The new mechanistic–empirical (M-E) pavement design guide, Guide for Mechanistic–Empirical Design of New and Rehabilitated Pavement Structures, developed under NCHRP Project 1–37A uses E* as the primary material property of asphalt mixtures for the HMA characterization. A comprehensive study was completed at Arizona State University to assess the effect of lime addition on the E* stiffness of HMA mixtures. The study demonstrated that the standard test and design methodologies of the new M-E pavement design guide could be used effectively for lime-modified HMA mixes. With these methodologies, hydrated lime was found to increase the E* of HMA mixtures by 17% to 65% across the range of mixtures, lime contents, and temperature, with an overall average of 25% increase found from 17 mixture–lime percentage combinations across six different HMA mixes. This paper also outlines a provisional protocol for evaluating the E* master curve for lime-modified HMA mixtures using any of the three hierarchical levels found in the new NCHRP Project 1–37A pavement design guide.

Transfer optics for high spatial resolution electron spectroscopy

1988 ◽  
Vol 46 ◽  
pp. 666-667
Author(s):  
G. G. Hembree ◽  
Luo Chuan Hong ◽  
P.A. Bennett ◽  
J.A. Venables
Keyword(s):  
Magnetic Field ◽  
Scanning Transmission Electron Microscope ◽  
Low Energy ◽  
Objective Lens ◽  
State University ◽  
Arizona State University ◽  
Initial Field ◽  
Resolution Electron ◽  
Scanning Transmission ◽  
Low Energy Electrons

A new field emission scanning transmission electron microscope has been constructed for the NSF HREM facility at Arizona State University. The microscope is to be used for studies of surfaces, and incorporates several surface-related features, including provision for analysis of secondary and Auger electrons; these electrons are collected through the objective lens from either side of the sample, using the parallelizing action of the magnetic field. This collimates all the low energy electrons, which spiral in the high magnetic field. Given an initial field Bi∼1T, and a final (parallelizing) field Bf∼0.01T, all electrons emerge into a cone of semi-angle θf≤6°. The main practical problem in the way of using this well collimated beam of low energy (0-2keV) electrons is that it is travelling along the path of the (100keV) probing electron beam. To collect and analyze them, they must be deflected off the beam path with minimal effect on the probe position.

Readjustment of the Standard ASUDAS to Encompass Dental Morphological Variations in Plio-Pleistocene Hominins

2018 ◽  
Vol 30 (1-2) ◽  
pp. 32-48
Author(s):  
M. Louail ◽  
S. Prat
Keyword(s):  
Phylogenetic Relationships ◽  
Homo Sapiens ◽  
Initial Study ◽  
Morphological Characters ◽  
State University ◽  
Arizona State University ◽  
Dental Anthropology ◽  
Morphological Variations ◽  
Fossil Hominins ◽  
Fossil Hominin

The standard ASUDAS scoring system (Arizona State University Dental Anthropology System) is used to assess dental morphological variations in modern humans. It is also frequently used to study, score, and compare morphological variations in fossil hominin taxa and to examine their phylogenetic relationships. However, using ASUDAS in studies of this type is under debate because it is based on modern Homo sapiens populations and does not appear to cover all variations observed in fossil Plio-Pleistocene homi- nins. Our observations and coding of 178 dentals casts of Plio-Pleistocene specimens based on ASUDAS and from the literature have confirmed the need to adapt the standard system to fossil hominins. In this initial study, we propose that the scoring procedures for some morphological characters need to be readjusted, while others could be standardized following the ASUDAS system.

Decálogos e inventarios

2018 ◽  
Vol 16 (4e) ◽  
pp. 122
Author(s):  
Andoni Garritz ◽  
Andrés Raviolo
Keyword(s):  
State University ◽  
Arizona State University

<span>La investigación en torno a las concepciones alternativas (Wandersee, Mintzes, y Novak, 1994; Arizona State University, 2001; Flores, 2002) constituye una de las principales y fecundas líneas de investigación en Didáctica de las Ciencias que ha contribuido, en buena medida, a su surgimiento y consolidación como disciplina o campo de conocimiento (Gil, 1994; Adúriz-Bravo e Izquierdo, 2002). La Didáctica de la Química forma parte de esta ciencia.</span>

scholarly journals Making sense of archaeology - Cornelius Holtorf, illustrated by Quentin Drew. Archaeology is a brand!: the meaning of archaeology in contemporary popular culture. x+184 pages, numerous illustrations. 2007. Oxford: Archaeopress; 978-1-905739-06-6 paperback £14.99. - Nicholas J. Cooper (ed.). The Archaeology of the East Midlands: An Archaeological Resource Assessment and Research Agenda (Leicester Archaeology Monograph 13). xvi+378 pages, 72 b&w & colour illustrations, 8 tables. 2006. Leicester: University of Leicester; 0-9538914-7-X paperback £19.95. - John Hunter & Ian Ralston (ed.). Archaeological Resource Management in the UK: An Introduction. Second revised edition (first published 1993). xiv+402 pages, numerous illustrations. 2006. Stroud: Sutton; 978-0-7509-2789-5 hardback £25. - R.G. Matson & Timothy A. Kohler (ed.). Tracking Ancient Footsteps: William D. Lipe's Contribution to Southwestern Prehistory and Public Archaeology. xii+188 pages, 35 illustrations, 2 tables. 2006. Pullman (WA): Washington State University Press; 978-0-87422-290-6 paperback $22.95. - Jeffrey L. Hantman & Rachel Most (ed). Managing Archaeological Data: Essays in Honor of Sylvia W. Gaines (Arizona State University Anthropological Research Paper 57). x+202 pages, 37 illustrations, 42 tables. 2006. Tempe (AZ): Department of Anthropology, Arizona State University; 978-0-936249-18-6 paperback $33.50. - Michael D. Coe. Final report: An Archaeologist Excavates His Past. 224 pages, 6 figures, 35 plates. 2006. London: Thames & Hudson; 0-500-05143-7 hardback £18.95.

Antiquity ◽  
2007 ◽  
Vol 81 (312) ◽  
pp. 496-498
Author(s):  
Madeleine Hummler
Keyword(s):  
Resource Assessment ◽  
Final Report ◽  
State University ◽  
Arizona State University ◽  
Washington State University ◽  
Archaeological Data ◽  
Making Sense ◽  
East Midlands ◽  
John Hunter ◽  
The Uk
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