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Biomedical Signal Processing Toolbox-BIOMEDICAL SIGNAL ANALYSIS

Abstract.

This article describes a biomedical signal processing (BSP) toolbox for the analysis
of physiologic signals. The BSP toolbox is designed to enable researchers to conduct
preliminary analysis of physiologic time series, such as the electrocardiogram (ECG),
intracranial pressure (ICP), arterial blood pressure (ABP), and oxygen saturation (SpO2).
The toolbox includes detection algorithms for the ECG and pressure waveforms, spectral
analysis, nonlinear filtering, multi-signal analysis, and nonstationary signal visualization.
The following sections discuss the functionality of this toolbox and provide examples of its
application.

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Head massaging hat has been made

Head massaging hat certifies your dorkiness

Massages are great, but I generally prefer the touch of another human over a machine.

Now Osim, the folks who brought us the massaging MP3 player, have one upped their earlier efforts with the uCrown 2 head massager. Combining air pressure technology, vibration massage, magnetic therapy, gentle heat, and even some built in speakers so you can play some relaxing Yanni music, the uCrown 2 is designed to relieve stress while relaxing your muscles. My only concern is that the benefits will be outweighed by the embarrassment of your family pointing and laughing at you.

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Biomedical scientists give man his sight back

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Stem cell research carried out by biomedical scientists has enabled a man who was left partially sighted after intervening in a fight to recover his vision.

In 1994, Russell Turnbull lost most of the sight of his right eye after being sprayed in the face with ammonia while trying to break up an altercation on a bus, the Times reports.

The 38-year-old was left with pain, extreme sensitivity to light and cloudy vision.

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DNA SEQUENCING BECOMES FASTER-SCIENCE DAILY

Boston University biomedical engineers have devised a method for making future genome sequencing faster and cheaper by dramatically reducing the amount of DNA required, thus eliminating the expensive, time-consuming and error-prone step of DNA amplification.

In a study published in the Dec. 20 online edition of Nature Nanotechnology, a team led by Boston University Biomedical Engineering Associate Professor Amit Meller details pioneering work in detecting DNA molecules as they pass through silicon nanopores. The technique uses electrical fields to feed long strands of DNA through four-nanometer-wide pores, much like threading a needle. The method uses sensitive electrical current measurements to detect single DNA molecules as they pass through the nanopores.

“The current study shows that we can detect a much smaller amount of DNA sample than previously reported,” said Meller. “When people start to implement genome sequencing or genome profiling using nanopores, they could use our nanopore capture approach to greatly reduce the number of copies used in those measurements.”

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INTERVIEW AND SHORT ANSWER QUESTION ON IMAGE PROCESSING-BIOMEDICAL JOBS & NOTES QUESTION 41-60

41. What are the applications of transform.
1) To reduce band width
2) To reduce redundancy
3) To extract feature.

42. Give the Conditions for perfect transform?
Transpose of matrix = Inverse of a matrix.
Orthoganality.

43. What are the properties of unitary transform?
1) Determinant and the Eigen values of a unitary matrix have unity magnitude 2) the entropy of a random vector is preserved under a unitary Transformation
3) Since the entropy is a measure of average information, this means information
is preserved under a unitary transformation.

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INTERVIEW AND SHORT ANSWER QUESTION ON IMAGE PROCESSING-BIOMEDICAL JOBS & NOTES QUESTION 21-40

21. Define subjective brightness and brightness adaptation?
Subjective brightness means intensity as preserved by the human visual system.
Brightness adaptation means the human visual system can operate only from
scotopic to glare limit. It cannot operate over the range simultaneously. It accomplishes
this large variation by changes in its overall intensity.

22. Define weber ratio
The ratio of increment of illumination to background of illumination is called as
weber ratio.(ie) ?i/i
If the ratio (?i/i) is small, then small percentage of change in intensity is needed
(ie) good brightness adaptation.
If the ratio (?i/i) is large , then large percentage of change in intensity is needed
(ie) poor brightness adaptation.

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