Calibrated single-plunge bipolar electrode array for mapping myocardial vector fields in three dimensions during high-voltage transthoracic defibrillation

The subject of this paper is the formulation of a specific algorithm for the kinematic analysis of spherical four-bar linkages via the inflection spherical cubic and spherical Thales ellipse by devoting particular attention to the crossed four-bar linkage (anti-parallelogram). Moreover, both the inflection and the elliptic cones, which represent the equivalent of the Bresse cylinders of the planar case in three-dimensions, are obtained by showing the particular properties of the spherical motion in terms of the curvature of a coupler curve and both the velocity and acceleration vector fields. Of special interest are also the cases in which the three acceleration poles coincide at one unique point or in two plus one, which depends on the intersections of two spherical curves of third and second degree.

Download Full-text

Nanoneedle-Electrode Array Packaged with Amplifiers for Recording Biological-Signals with A High Voltage Gain

2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII) ◽

10.1109/transducers.2019.8808366 ◽

2019 ◽

Cited By ~ 1

Author(s):

Shuhei Tsuruhara ◽

Yoshihiro Kubota ◽

Hiroshi Kubo ◽

Hirohito Sawahata ◽

Shota Yamagiwa ◽

...

Keyword(s):

High Voltage ◽

Electrode Array ◽

Voltage Gain ◽

High Voltage Gain ◽

Biological Signals

Download Full-text

Shaping Electroluminescence with a Large, Printed Bipolar Electrode Array: Solid Polymer Electrochemical Cells with Over a Thousand Light‐Emitting p–n Junctions

ChemElectroChem ◽

10.1002/celc.202000153 ◽

2020 ◽

Vol 7 (7) ◽

pp. 1748-1751 ◽

Cited By ~ 2

Author(s):

Shiyu Hu ◽

Jun Gao

Keyword(s):

Electrode Array ◽

Solid Polymer ◽

Bipolar Electrode ◽

Electrochemical Cells ◽

Light Emitting

Download Full-text

Mineral and Organic Matrix Interaction in Normally Calcifying Tendon Visualized in Three Dimensions by High-Voltage Electron Microscopic Tomography and Graphic Image Reconstruction

Journal of Structural Biology ◽

10.1006/jsbi.1993.1003 ◽

1993 ◽

Vol 110 (1) ◽

pp. 39-54 ◽

Cited By ~ 413

Author(s):

W.J. Landis ◽

M.J. Song ◽

A. Leith ◽

L. McEwen ◽

B.F. McEwen

Keyword(s):

Image Reconstruction ◽

High Voltage ◽

Organic Matrix ◽

Three Dimensions ◽

Electron Microscopic ◽

Matrix Interaction ◽

Voltage Electron ◽

High Voltage Electron ◽

Graphic Image

Download Full-text

ISRAEL–WILSON–PERJÉS SOLUTIONS IN HETEROTIC STRING THEORY

International Journal of Modern Physics A ◽

10.1142/s0217751x99000701 ◽

1999 ◽

Vol 14 (09) ◽

pp. 1345-1356 ◽

Cited By ~ 7

Author(s):

ALFREDO HERRERA-AGUILAR ◽

OLEG KECHKIN

Keyword(s):

String Theory ◽

Vector Fields ◽

Equations Of Motion ◽

Simple Algorithm ◽

Heterotic String ◽

Three Dimensions ◽

Heterotic String Theory ◽

The Matrix ◽

Em Theory ◽

Bosonic Part

We present a simple algorithm to obtain solutions that generalize the Israel–Wilson–Perjés class for the low energy limit of heterotic string theory toroidally compactified from D=d+3 to three dimensions. A remarkable map existing between the Einstein–Maxwell (EM) theory and the theory under consideration allows us to solve directly the equations of motion making use of the matrix Ernst potentials connected with the coset matrix of heterotic string theory.1 For the particular case d=1 (if we put n=6, the resulting theory can be considered as the bosonic part of the action of D=4, N=4 supergravity) we obtain explicitly a dyonic solution in terms of one real 2×2-matrix harmonic function and 2n real constants (n being the number of Abelian vector fields). By studying the asymptotic behavior of the field configurations we define the charges of the system. They satisfy the Bogomol'nyi–Prasad–Sommerfield (BPS) bound.

Download Full-text

Enhancement of signal quality in esophageal recordings of diaphragm EMG

Journal of Applied Physiology ◽

10.1152/jappl.1997.82.4.1370 ◽

1997 ◽

Vol 82 (4) ◽

pp. 1370-1377 ◽

Cited By ~ 76

Author(s):

Christer A. Sinderby ◽

Jennifer C. Beck ◽

Lars H. Lindström ◽

Alejandro E. Grassino

Keyword(s):

Power Spectrum ◽

Signal To Noise Ratio ◽

Electrode Array ◽

Center Frequency ◽

Signal Quality ◽

Fiber Direction ◽

Bipolar Electrode ◽

Subtraction Technique ◽

Emg Power Spectrum ◽

Crural Diaphragm

Sinderby, Christer A., Jennifer C. Beck, Lars H. Lindström, and Alejandro E. Grassino. Enhancement of signal quality in esophageal recordings of diaphragm EMG. J. Appl. Physiol. 82(4): 1370–1377, 1997.—The crural diaphragm electromyogram (EMGdi) is recorded from a sheet of muscle, the fiber direction of which is mostly perpendicular to an esophageal bipolar electrode. The region from which the action potentials are elicited, the electrically active region of the diaphragm (EARdi) and the center of this region (EARdi ctr) may vary during voluntary contractions in terms of their position with respect to an esophageal electrode. Depending on the bipolar electrode’s position with respect to the EARdi ctr, the EMGdi is filtered to different degrees. The objectives of the present study were to reduce these filtering effects on the EMGdi by developing an analysis algorithm referred to as the “double-subtraction technique.” The results showed that changes in the position of the EARdi ctr by ±5 mm with respect to the electrode pairs located 10 mm caudal and 10 mm cephalad provided a systematic variation in the EMG power spectrum center-frequency values by ±10%. The double-subtraction technique reduced the influence of movement of the EARdi ctr relative to the electrode array on EMG power spectrum center frequency and root mean square values, increased the signal-to-noise ratio by 2 dB, and increased the number of EMG samples that were accepted by the signal quality indexes by 50%.

Download Full-text