The form of a folk song as heard at any one time, however, is likely to have been very much affected by the entire community because of its life in oral tradition. Once introduced, a song could be easily dropped from the repertory. More likely, however, as it was passed from parents to children and to friends and associates and coworkers, it would be changed. Numerous influences acted on a song, including creativity, forgetfulness, previously learned songs, and stylistic expectations. As a result, it might become shorter or more like new styles of popular or church music, for example. Any new song would be likely to undergo this process of communal re-creation. An important characteristic of a song or piece in traditional folk culture is, thus, its dependence on acceptance by a community—that is, by a village, nation, or family—and its tendency to change as it is passed from one individual to another and performed.
UNSOLVED BT505 GDB1 Solution and discussion
Total Marks 10
Starting Date Wednesday, July 31, 2019
Closing Date Friday, August 02, 2019
Question Title Biosignal
BT505 – Biosensors
Your discussion must be based on logical facts.
Your comments on the topic should not exceed 200-250 words.
The GDB will remain open for 4 working days.
Do not copy or exchange your answer with other students. Two identical / copied comments will be marked Zero (0) and may damage your grade in the course.
Obnoxious or ignoble answer should be strictly avoided.
Questions / queries related to the content of the GDB, which may be posted by the students on MDB or via e-mail, will not be replied till the due date of GDB is over.
For Detailed Instructions please see the GDB Announcement.
A biosignal is any signal in living beings that can be continually measured and monitored. The term biosignal is often used to refer to bioelectrical signals, but it may refer to both electrical and non-electrical signals.
Biosignals provide communication between biosystems and are our primary source of information on their behavior. Interpretation and transformation of signals are major topics of this text. Biosignals, like all signals, must be carried by some form of energy. Biosignals can be measured directly from their biological source, but often external energy is used to measure the interaction between the physiological system and external energy. Measuring a biosignal entails converting it to an electric signal using a device known as a biotransducer. The resultant analog signal is often converted to a digital (discrete-time) signal for processing in a computer.
Biosignals and the systems that produce them have several important properties: they can be stationary or nonstationary, linear or nonlinear, and deterministic or stochastic (i.e., random). Biosignals often contain noise, which is an unwanted signal component.
Biosystems modeling is a powerful analytical tool for investigating living systems. Two very different models have been developed to represent physiological systems: analog models and system models. Each representation has different strengths and weaknesses.
The goal of this book is to present the most important and fundamental of the many powerful signal and systems analysis tools available to biomedical engineers.