| An Instrument for the Bedside Quantification of Spasticity: A Pilot Study |
25 OCT 2001 |
|
| Authors:
T. Hughes; B. J. Western; M. Thomas; R. van Deursen; H. Griffiths; UNIVERSITY HOSPITAL OF WALES CARDIFF (UNITED KINGDOM) MEDICAL PHYSICS AND CLINICAL ENGINEERING
|
 | Spasticity is a velocity-dependent phenomenon; the quicker the limb is moved the more resistance is encountered. A compact, portable instrument was constructed for recording the angle at the knee, the rate of change of angle (angular velocity) and the force encountered at the ankle when the limb was flexed. A pilot study was performed on 5 normal volunteers and 5 patients with spasticity. A preliminary index of spasticity was extracted ... |
|
| Light Scatterometry as an NDE Technique for Surface Characterization of Ge Windows |
93 |
|
| Authors:
I. Perez; M. Wilson; M. Thomas; D. Price; W. R. Scott
|
| Ge is a material commonly used for IR window applications. Like many other window materials, Ge is brittle and susceptible to surface damage by rain drop erosion when moving at high velocities. In this study we have investigated the use of light scatter as an NDE technique to measure the amount of surface damage. Two type of samples were prepared for this study. The first type consisted of four 1 ... |
|
| Potential and Prospects of Some Intermetallic Compounds for Structural Applications |
92 |
|
| Authors:
S. Naka; M. Thomas; T. Khan; OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES CHATILLON-SOUS-BAGNEUX (FRANCE)
|
| Structural applications of some intermetallic compounds have been discussed. Advantages of multiphase intermetallics for several alloy systems were reviewed along with a novel approach for producing gamma-gamma prime type two phase microstructure in different alloy systems, taking into consideration the stability of the constituent phases. |
|
| Potential and Prospects of Some Intermetallic Compounds for Structural Applications |
91 |
|
| Authors:
S. Naka; M. Thomas; T. Khan; OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES CHATILLON-SOUS-BAGNEUX (FRANCE)
|
| This paper presents a discussion on the potential and prospects of some intermetallic compounds for structural applications. The benefits linked with the development of multi-phase intermetallics and a novel approach for creating the two-phase gamma-gamma prime type microstructure in different alloy systems is described. The stability of the constituent phases in multi-phase intermetallic based alloys is discussed. The superiority of the Ni-base gamma- gamma prime alloys over single-phase gamma prime ... |
|
| Microstructure-Ductility Relationships in a Ti3Al Base Alloy |
90 |
|
| Authors:
A. Vassel; I. Ehrhart; M. Thomas; OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES CHATILLON-SOUS-BAGNEUX (FRANCE)
|
| The objective of this study is to identify the microstructural features which influence the plasticity in alloys based on the Ti3Al compound; the effort to improve the ductility has been focused in the development of a fine two phase alpha(sub 2) + beta structure with the high temperature beta phase being stabilized by the addition of vanadium; two processing routes were used, isothermal forging and powder metallurgy, and different subsequent ... |
|
| A Versatile Interface for Instrument Control |
05 AUG 87 |
|
| Authors:
Gregory Nelson; G. Patonay; Isiah M. Warner; M. Thomas; EMORY UNIV ATLANTA GA DEPT OF CHEMISTRY
|
| An inexpensive interface which uses Zilog Z-80 microprocessor compatible interface chops and allows instrumental control and data acquisition using a Radio Shack TRS-80 Model 4 microcomputer is described. This interface provides parallel and serial data handling capabilities useful to a wide variety of instrumentation. A block diagram of the TRS-80 compatible interface is presented and the TTL signals which are used for chip selection, control and input/output functions are discussed. ... |
|
| Influence of Delta Prime Phase Coalescence on Young's Modulus in an Al-2.5 wt% Li Alloy, |
JAN 1986 |
|
| Authors:
F. Broussaud; M. Thomas; OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES CHATILLON-SOUS-BAGNEUX (FRANCE)
|
| A high-precision pulse-echo apparatus has been developed to measure variations of the ultrasonic velocity as a function of isothermal annealing of an Al-2.5 wt% Li alloy. The method has already been shown to be particularly sensitive for detecting small changes in specific Young's modulus. Agings were performed at temperatures below the metastable solvus line of the delta prime phase, i.e. between 190 and 250 C. Microhardness measurements were carried out ... |
|
| Multidimensional Luminescence Measurements |
30 APR 85 |
42 pages |
| Authors:
I. M. Warner; G. Patonay; M. Thomas; EMORY UNIV ATLANTA GA DEPT OF CHEMISTRY
|
 | Luminescence spectroscopy has long been recognized as a tool for the quantititive and qualitative identification of a wide range of molecular systems. However, the resolving power of these techniques is often limited for similar compounds because absorption and emission peaks are typically broad banded and leads to overlapping spectra. To increase the resolving power of luminescence studies, recent studies have used multidimensional luminescence measurements (MLM) (use of two or more ... |
|
| Bradley Fighting Vehicle Composite Turret, |
21 DEC 1984 |
|
| Authors:
J. Stanish; L. Schrader; M. Thomas; W. Lawrence; FMC CORP SAN JOSE CA ORDNANCE ENGINEERING DIV
|
| Work progress is reported for a Quality Assurance Program Plan (QAPP) to provide a document that is responsive to MIL-Q-9858A, Ordnance Division Policy and Procedures. This plan contains a description of quality procedures that delineate quality related responsibilities and describes the controls of design, procurement, and manufacturing. Some of the information presented includes: 1)inspection support and direction to Engineering to ensure quality is controlled through gauge and tool control, inprocess, ... |
|
| Highly Accurate Inflatable Reflectors |
MAY 1984 |
40 pages |
| Authors:
G. Veal; M. Thomas; L'GARDE INC NEWPORT BEACH CALIF
|
| Analytic and experimental studies were performed to see if inflatable reflectors could be made with rms surface errors of less than 0.1 mm (a 1.0 mm capability had already been demonstrated). Surveys of film vendors resulted in the selection of several approaches including heat forming, laser-welding of gores, prestretching of gores, and gore reinforcement. Results show that inaccuracies less than 0.1 mm rms are feasible. The preferred approaches require heat ... |
|
| Ultrastructural and Biochemical Changes in a Prokaryote Induced by Cytoskeletal Active Drugs |
28 JUN 1982 |
|
| Authors:
P. H. Calcott; D. A. Morton; B. A. Ghani; R. S. Petty; M. Thomas; WRIGHT STATE UNIV DAYTON OH DEPT OF BIOLOGICAL SCIENCES
|
|
| APPROXIMATE THEORETICAL CALCULATIONS OF CONTINUUM OPACITIES: I. RADIANT ENERGY EMISSION FROM ISOTHERMAL AND NON-ISOTHERMAL GASES: II, |
NOV 1963 |
|
| Authors:
M. Thomas; S. S. Penner; CALIFORNIA INST OF TECH PASADENA GUGGENHEIM JET PROPULSION CENTER
|
| An approximate procedure is described for the theoretical calculation of the spectral absorption coefficient produced by bound-free andfreefree transitions in plasmas containing polyelectronic atoms and ions. This method of calculation is based on the assumption that only two ionized species make important contributions to the opacity and that these two ionic constituents are present in equal concentrations. The approximate formulae are shown to yield results that are in good accord ... |
|
Reports by Author
