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Topic: Developmental stages


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In the News (Tue 7 Oct 08)

  
  AllRefer.com - embryo : Developmental Stages (Cell Biology) - Encyclopedia
In organisms that reproduce sexually, the union of the sperm with the ovum results in a zygote, or fertilized egg, which begins a rapid series of cell divisions called cleavage, or segmentation (see mitosis).
Among the coelenterates (e.g., sponges and jellyfish), these two layers become the chief functional tissues of the adult.
In higher forms of life, a third layer of cells, the mesoderm, develops from one or both of the first two layers and fills the blastocoel, and invagination forms a digestive tract with only a single opening at this early stage.
reference.allrefer.com /encyclopedia/E/embryo-developmental-stages.html   (494 words)

  
 Gale Encyclopedia of Psychology: Developmental stages, theories of
Developmental psychologists, by and large, study the way humans develop from an embryo into a full grown adult, focusing mainly on the factors that contribute to intelligence, personality, morality, and lifestyle.
He theorized that people pass from one stage to another not just as a matter of course, but only when they are confronted with the correct type of stimulation to initiate a change.
During the formal operational stage, from age 12 to adulthood, people develop the ability to think logically and systematically and to understand abstractions and the concepts of causality and choice.
www.findarticles.com /p/articles/mi_g2699/is_0000/ai_2699000096   (1220 words)

  
 Cogprints - Subject: Robotics   (Site not responding. Last check: 2007-10-26)
Andry, Pierre and Gaussier, Philippe and Nadel, Jacqueline and Courant, Michele (2003) A Developmental Approach for low-level Imitations.
Dominey, Peter Ford and Boucher, Jean-David (2004) Developmental Stages of Perception and Language Acquisition in a Perceptually Grounded Robot.
Kulakov, Andrea and Stojanov, Georgi (2002) Structures, inner values, hierarchies and stages: essentials for developmental robot architectures.
cogprints.org /view/subjects/comp-sci-robot.html   (5589 words)

  
 ipedia.com: Stellar astronomy Article   (Site not responding. Last check: 2007-10-26)
Stellar astronomy is the study of stars and the phenomena exhibited by the various forms/developmental stages of stars.
Stellar astronomy has two main approaches, observational and theoretical.
Theoretical stellar astronomy includes various forms of stellar modeling as well as models of specific phenomena which have been observationally associated with stars (such as magnetic reconnection models for stellar flares or Raymond-Smith models for high-temperature plasmas which may surround stars or which may be found in other astronomical contexts).
www.ipedia.com /stellar_astronomy.html   (169 words)

  
 Big Ear Radio Observatory - Questions and Answers on SETI
There could be the Encyclopedia Galactica to teach us many things.
The mere fact that one other civilization exists would tell us that not all civilizations destroy themselves during their developmental stages.
The "planetary side" of SETI is research into how life, intelligent or otherwise, could occur elsewhere: what conditions, what state of development, and so on.
www.bigear.org /seti_qa.htm   (789 words)

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