Difference between revisions of "Parameters"

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The model includes 6 parameters, representing morphospace dimensions: (1–3) Chamber scaling ratios defined in 3-dimensional space by 3 parameters: kx - chamber width ratio, ky - chamber height ratio, kz - chamber depth ratio. If all chamber scaling ratios equal each other, i.e., kx = ky = kz, a new chamber is isometric to the previous one. Any differences in chamber scaling ratios cause allometric growth of successive chambers; (4) TF (translation factor) controls an overlap of successive chambers (Fig. 1). The “0” TF value places the centre of a new chamber directly at the aperture of the last chamber. This parameter ranges from “-1” to “+1” values. Higher values detach a new chamber from the existing shell that represents a “forbidden zone” sensu Berger (1969); (5) Df as a deviation angle (deflection angle) is an angle between the local reference line and the line defining the centre of a new chamber (Fig. 1). It ranges from -180° to 180°. Higher or lower out of range values can be recalculated to the values from the given range; (6) b represents a rotation angle along the local growth line (Fig. 1). This parameter is necessary in 3-dimensional space. It ranges from -180° to 180°. Higher or lower values can also be recalculated.
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'''[[VirtuaLab]]''' | [[MODELS]] |  [[OUR PUBLICATIONS]] |
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== [[MOVING REFERENCE MODELS|Moving-reference model]] parameters ==
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[[Image:Model_parameters.jpg|thumb|left|222px|<font size="2">Moving-reference model parameters <font size="1">([[Tyszka 2006]], modified)</font>]]
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The model includes 6 parameters, representing [[MORPHOSPACE|'''morphospace''']] dimensions:  
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* Chamber scaling ratios defined in 3-dimensional space by 3 parameters:  
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** '''kx''' - chamber width ratio,  
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** '''ky''' - chamber height ratio,  
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** '''kz''' - chamber depth ratio.  
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If all chamber scaling ratios equal each other, i.e., kx = ky = kz, a new chamber is isometric to the previous one. Any differences in chamber scaling ratios cause allometric growth of successive chambers.
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* '''TF''' (translation factor) controls an overlap of successive chambers (see Fig.); the “0” TF value places the centre of a new chamber directly at the aperture of the last chamber. This parameter ranges from “-1” to “+1” values. Higher values detach a new chamber from the existing shell that represents a “forbidden zone” sensu Berger (1969)
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* '''&phi;''' as a deviation angle (deflection angle) an angle between the local reference line and the line defining the centre of a new chamber; it ranges from -180° to 180°. Higher or lower out of range values can be recalculated to the values from the given range
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* '''&beta;''' as a rotation angle; this parameter is necessary in 3-dimensional space. It ranges from -180° to 180°; higher or lower values can also be recalculated.
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''After [[Tyszka 2006]]''

Latest revision as of 10:10, 21 March 2006