Complexity, Chaos, and Biological Evolution (Nato Science by Erik Mosekilde, Lis Mosekilde

By Erik Mosekilde, Lis Mosekilde

Now and then, maybe once or twice each one century, a revolution happens that questions a few of our easy ideals and sweeps throughout in a different way good guarded disciplinary limitations. those are the classes while technological know-how is enjoyable, whilst new paradigms need to be formulated, and while younger scientists can do severe paintings with out first having to procure all of the wisdom in their academics. The emergence of nonlinear technology seems to be one such revolution. In a shocking demeanour, this new technology has disclosed a few misconceptions in our conventional knowing of determinism. particularly, it's been proven that the idea of predictability, in response to which the trajectory of a method will be accurately decided if one understands the equations of movement and the preliminary stipulations, is expounded to textbook examples of straightforward; integrable structures. This predictability doesn't expand to nonlinear, conservative structures commonly. Dissipative platforms may also express unpredictability, only if the movement is continued via externally provided power and/or assets. those discoveries, and the linked discovery that even fairly basic nonlinear structures can express tremendous complicated habit, have caused an unparalleled feeling of universal curiosity between scientists from many alternative disciplines. over the last decade or now we have come to appreciate that there are common routes to chaos, we've realized approximately stretching and folding, and now we have found the attractive fractal geometry underlying chaotic attractors.

Show description

Read or Download Complexity, Chaos, and Biological Evolution (Nato Science Series B:) (Volume 270) PDF

Best evolution books

Animal Signals (Oxford Series in Ecology and Evolution)

Why are animal indications trustworthy? this is often the important challenge for evolutionary biologists drawn to indications. in fact, no longer all indications are trustworthy; yet such a lot are, in a different way receivers of indications might forget about them. a few theoretical solutions were proposed and empirical stories made, yet there nonetheless continues to be a large amount of confusion.

Life Ascending: The Ten Great Inventions of Evolution

From Publishers Weekly
Starred assessment.
In this excellent ebook, Lane (Power, intercourse, Suicide), a biochemist at collage university London, asks an exciting and straightforward query: what have been the nice organic innovations that resulted in Earth as we all know it. (He is fast to show that via invention, he refers to nature's personal creativity, to not clever layout. )
Lane argues that there are 10 such innovations and explores the evolution of every. now not unusually, all the 10—the starting place of lifestyles, the production of DNA, photosynthesis, the evolution of complicated cells, intercourse, stream, sight, hot bloodedness, cognizance and death—is problematic, its origins swirling in major controversy.
Drawing on state of the art technological know-how, Lane does a masterful task of explaining the technological know-how of every, distinguishing what's really conclusively identified and what's at the moment moderate conjecture.
At instances he offers a few surprising yet compelling details.
For instance, one of many light-sensitive pigments in human eyes most likely arose first in algae, the place it may well nonetheless be discovered this present day supporting to maximise photosynthesis.
While every one of Lane's 10 topics merits a e-book of its personal, they arrive jointly to shape a sublime, absolutely fulfilling entire.
20 illus. (June)

Charles Darwin: A Celebration of His Life and Work

Charles Darwin (1809–82) replaced the area without end with the 1859 ebook of at the beginning of Species via ordinary choice. Charles Darwin: a party of His existence and Legacy is an anthology of severe writings that grew out of a lecture sequence, hosted by way of Auburn college, hung on the party of the 2 hundredth anniversary of Darwin's start and the one hundred and fiftieth anniversary of the 1st variation of his most famed publication.

Extra resources for Complexity, Chaos, and Biological Evolution (Nato Science Series B:) (Volume 270)

Example text

Subharmonic bifurcations and chaotic episodes are clearly visible. irn [m~; 1 Figure 2. Cry segment with a sudden transition from a ''basic cry" (pitch about 400 Hz) to a subharmonic regime with nearly the double pitch period. 44 time [ms] Figure 3. Newborn cry displaying a transition to very low fundamental frequencies. octave jumps but also changes of the pitch by a factor of 3 are reported (Howard 1989). Another common phenomenon in speech is very low-pitched regimes (Dolansky and Tjerlund 1968, Catford 1977).

And Babloyantz, A. Predictability of human EEG: a dynamical approach. BioI. Cybernetics, in press, 1990. A. Intrinsic limits on dimension calculations. Phys. Lett. A. 133: 283288, 1988. 40 CHAOS AND BIFURCATIONS DURING VOICED SPEECH Hanspeter Herzel, Ina Steinecke, Werner Mende and Kathleen Wermke Humboldt University Berlin Invalidenstr. 42 1040 Berlin Federal Republic of Germany ABSTRACT Paralysis, laryngitis, cancer and other pathological conditions often lead to irregularities in the sounds of speech.

Then a backward octave jump to fast oscillations occurs. Comparable frequency breaks are observed also during human speech (Bowler 1964). -g-'••--, • , 1 11 .. , • I t 'I ,l1li I' U U I" " III: 2 Figure 1. Spectrogram from a premature infant (28 weeks) with respiratory complications. Subharmonic bifurcations and chaotic episodes are clearly visible. irn [m~; 1 Figure 2. Cry segment with a sudden transition from a ''basic cry" (pitch about 400 Hz) to a subharmonic regime with nearly the double pitch period.

Download PDF sample

Rated 4.70 of 5 – based on 3 votes