We have field-tested an apparatus for measuring the electromagnetic impedance above the ground at a plurality of frequencies in the 0.3 - 30 MHz range. This window in the frequency spectrum, which lies between frequencies used for GPR and those used for conventional loop-loop EM soundings, has not been used because of difficulties in fielding equipment for ...
Energy Citations Database
... Title : AC IMPEDANCE MEASUREMENT OF ENVIRONMENTAL ... OF INTERFACIAL IMPEDANCE MEASUREMENT ARE ... OF THE METHOD IN ...
DTIC Science & Technology
... A Comparison of Acoustic Impedance Measurement Techniques ... S. FUNDING NUMBERS A Comparison of Acoustic Impedance Measurement ...
... Title : THORACIC CAGE IMPEDANCE MEASUREMENTS. DYNAMIC CHARACTERISTICS OF AN IMPEDANCE PNEUMOGRAPH,. ...
... Title : THORACIC CAGE IMPEDANCE MEASUREMENTS. CANCELLATION OF RESPIRATION EFFECTS ON TRANSTHORACIC IMPEDANCE,. ...
... Accession Number : AD0423077. Title : THORACIC CAGE IMPEDANCE MEASUREMENTS IMPEDANCE PRODUCT SYSTEM,. ...
... Title : THORACIC CAGE IMPEDANCE MEASUREMENTS. TISSUE RESISTIVITY IN VIVO AND TRANSTHORACIC IMPEDANCE AT 100 KC. ...
... MEASUREMENTS. IMPEDANCE PLETHYSMOGRAPHIC DETERMINATION OF CARDIAC OUTPUT (AN INTERPRETIVE STUDY),. ...
... MEASUREMENTS. IMPEDANCE PLETHYSMOGRAPHIC DETERMINATION OF CARDIAC OUTPUT (A COMPARATIVE STUDY),. ...
... Title : ON IMPEDANCE MEASUREMENTS: THE DETERMINATION OF THE DOUBLE LAYER CAPACITANCE IN THE PRESENCE OF AN ...
... Accession Number : ADD143899. Title : Impedance and Photoelectrochemical Measurements on Passive Films Formed on Metallic Biomaterials. ...
... (Author). Descriptors : (*ROCKET ANTENNAS, ELECTRICAL IMPEDANCE), MEASUREMENT, PROBES, ALTITUDE, SOUNDING ROCKETS. ...
... Title : Experiments for the Measurement of the Acoustic Impedance of a ... differential which accompanies propellant sample combustion within the ...
... Accession Number : AD0056691. Title : APPLICATION OF UHF IMPEDANCE MEASURING TECHNIQUES IN BIOPHYSICS. ...
... Title : A Comparison of Acoustic ... MATERIALS, MEASUREMENT, ACOUSTIC WAVES ... TUBES, SOUND TRANSMISSION, ACOUSTICS, IMPEDANCE ...
A COMPARISON BETWEEN IMPEDANCE MEASURED BY A COMMERCIAL ANALYZER AND YOUR VALUE ADJUSTED BY A THEORETICAL ...
A derivation of the impedance equation for a stack resonator is presented. ... We describe an impedance-based measurement, which can probe the ...
NASA Website
... IMPEDANCE DATA ON OBLIQUE INCIDENCE ANTENNA LOCATED AT LUBBOCK, TEXAS by ... 2 Block diagram of the impedance measuring setup ...
... DEVELOPMENT OF A SOLID-STATE IMPEDANCE ... Second, this linear relationship exists over a large, measurable impedance range. ...
An impedance estimation method includes measuring three or more impedances of an object having a periphery using three or more probes coupled to the periphery. The three or more impedance measurements are made at a first frequency. Three or more additional impedance ...
DOE Information Bridge
... Abstract : Contents: Analytical determination of mechanical impedance Instruments and methods for measuring mechanical impedance ...
... Descriptors : *ELECTRODES, *ELECTRICAL IMPEDANCE, *SKIN(ANATOMY), *ELECTRICAL MEASUREMENT, *BLOOD CIRCULATION ...
... Descriptors : *STRUCTURAL PROPERTIES, *DAMPING, *SILICONES, *SYNTHETIC RUBBER, *ACOUSTIC IMPEDANCE, TEST AND ...
... A DEVICE FOR NONDESTRUCTIVE MEASUREMENT OF IMPEDANCE OF ASSEMBLED, CURVED SOUND ABSORBING LININGS HAS BEEN ...
Impedance measurements provide a useful probe of the physics of bolometers and calorimeters. We describe a method for measuring the complex impedance of these devices. In previous work, stray impedances and readout electronics of the measurement apparatus have resulted in ...
PubMed
... was examined by applying the methods described below. ... Electrochemical Measurements: Alternating current (AC) impedance measurements were ...
... Title : Electrical Ground Impedance Measurements in the United States Between ... evaluate new radiowave methods of measuring earth resistivity in ...
... 0") X rm on�3 >o � 3-m - THORACIC CAGE IMPEDANCE MEASUREMENTS ... 111io Page 7. THORACIC CAGE IMPEDANCE MEASUREMENTS ...
Apr 21, 2011 ... The Body Impedance Measurement (BIM) device measures the electrical impedance of the body during Lower Body Negative Pressure, ...
Page 1. An Acoustic Ground Impedance Measurement by John Williams ... ARL-TN-221 July 2004 An Acoustic Ground Impedance Measurement ...
This report describes an investigation that compares two acoustic impedance measurement techniques. The first is a wave decomposition method that breaks the wave energy into reflected and incident components and then calculates acoustic impedance. The sec...
National Technical Information Service (NTIS)
The report reviews the clinical usefulness of acoustic impedance measurements at the eardrum as well as the currently used instrumentation and methods. The conclusion is reached that both absolute and relative impedance measurements can be made with the a...
... Accession Number : ADD344829. Title : Quantitative Impedance Measurements for Eddy Current Model Validation,. Corporate Author : ...
... Title : IMPEDANCE MEASUREMENTS ON SYSTEM METAL/POLYMER ... OF METAL STRIP COATINGS DURING MECHANICAL DEFORMATION. ...
... Accession Number : AD0631675. Title : IMPEDANCE MEASUREMENTS OF CARDIAC OUTPUT DURING MODERATE HEAT EXPOSURE. ...
... Accession Number : AD0472044. Title : IMPEDANCE MEASUREMENT ON TRANSMISSION LINES. Descriptive Note : Technical rept.,. ...
... Plasma Impedance October 20, 2008 ... Electron Temperature Derived from Measurements of Complex Plasma Impedance ...
... Abstract : A measurement of the acoustic ground impedance was made on soil composed of sand and clay covered by splotchy amounts of long ...
... of the ac impedance at a metal-electrolyte interface as a function of frequency are depicted, and recently developed measurement techniques are ...
3 days ago ... The self-impedance of these spheres and the mutual impedance between the mesh and long-boom carbon spheres were measured. ...
Jul 21, 2011 ... The self-impedance of these spheres and the mutual impedance between the mesh and long-boom carbon spheres were measured. ...
circuit and electric impedance of the stator ... Figure 6: Computed electric impedance vesus measured. The input impedance is calculated according ...
RADC-TR-67-106 Interim Report RF BONDING IMPEDANCE STUDY ... 3 1.1 Systems:of Measurement of Bonding Impedance .... 3 ...
Found a relationship between impedance, signal and noise. Useful for validating calculations and ... same impedance on the bases of noise measurements ...
Apr 21, 2011 ... The Electrode Impedance Meter (EIM) is used to measure the impedance of the eight Medilog Sleep Research Recorder (MSRR) electrodes via a ...
Electrochemical impedance spectroscopy (EIS) is a non-destructive technique often used to understand ... the measured cell impedance in the form of real and ...
The eduction of the acoustic impedance for liner configurations is ... incidence acoustic impedance measurements using the two-microphone method of ten ...
... Title : Measurement of the Viscosity of Liquids Using a Longitudinally Vibrating PZT Ceramic and Electric Impedance Measurements,. ...
electric impedance. The axial spacing between the electrodes is adjusted by a pair of rods which ..... apparatus for measuring electric impedance between ...
... AD0694930. Title : POWER LINE IMPEDANCE DETERMINATION USING THE 'THREE VOLTMETER' MEASUREMENT METHOD. ...
... Title : JET NOISE SUPPRESSION BY AN IMPEDANCE SHROUD ... sheet of gas lying on an arc centered on the axis of a subsonic jet was measured. ...
... Title : Electrical Impedance Imaging of the Breast: Correlation with MRI, US, Sestamibi, and Histology With Measures of Cell Proliferation and ...
... Title : Electrical Impedance Imaging of the Breast: Correlation With MRI, US, Sestamibi and Histology With Measures of Cell Proliferaton and ...
Mechanical Impedance: Defined Mechanically as the ratio of ... Transmission Parameters Combine Mechanical Impedance and Transfer Functions, as used in ...
... The solution is to use bioelectrical impedance analysis. ... model of bioelectrical impedance analysis demonstrated the potential disparity between the ...
