Architecture and Mathematics

1996 ◽  
Vol 89 (6) ◽  
pp. 456-458
Author(s):  
Dan Reif

It's got to have a center staircase!” “I've always wanted a kitchen with an island!” “Where is the best place for a skylight?” Enthusiastic comments such as these were typical of those I overheard while conducting a two-week workshop in which students used three-dimensional-model-building kits to plan and construct detailed scale models of their own home designs and to develop and sharpen mathematics skills related to architecture.

Blood ◽  
1978 ◽  
Vol 51 (4) ◽  
pp. 633-643 ◽  
Author(s):  
N Mohandas ◽  
M Prenant

Abstract Three-dimensional scale models of bone marrow from a hypertransfused and a normal rat were constructed. The model of marrow from the hypertransfused rat demonstrated the existence of distinct erythroblastic islands in situ in which the erythroblasts underwent sychronous maturation. Macrophages were found in close association with the developing erythroblasts. The immature erythroblasts were tightly grouped, but as they matured they began to move apart. Erythroblasts in individual clusters were found to be at the same stage of morphologic maturation. In contrast, the model of marrow from the normal rat showed a majority of clusters containing erythroblasts at various stages of maturation. Erythropoiesis was not spatially restricted to the area proximal to the sinuses but was found to occur over the entire marrow space. Thrombopoiesis, however, was found to take place exclusively in the immediate vicinity of the marrow sinuses.


1991 ◽  
pp. 159-166
Author(s):  
W. Straßburger ◽  
W. Winter ◽  
G. J. Steffens ◽  
W. A. Günzler ◽  
L. Flohé

Blood ◽  
1978 ◽  
Vol 51 (4) ◽  
pp. 633-643 ◽  
Author(s):  
N Mohandas ◽  
M Prenant

Three-dimensional scale models of bone marrow from a hypertransfused and a normal rat were constructed. The model of marrow from the hypertransfused rat demonstrated the existence of distinct erythroblastic islands in situ in which the erythroblasts underwent sychronous maturation. Macrophages were found in close association with the developing erythroblasts. The immature erythroblasts were tightly grouped, but as they matured they began to move apart. Erythroblasts in individual clusters were found to be at the same stage of morphologic maturation. In contrast, the model of marrow from the normal rat showed a majority of clusters containing erythroblasts at various stages of maturation. Erythropoiesis was not spatially restricted to the area proximal to the sinuses but was found to occur over the entire marrow space. Thrombopoiesis, however, was found to take place exclusively in the immediate vicinity of the marrow sinuses.


2006 ◽  
Vol 11 (8) ◽  
pp. 398-406
Author(s):  
Kim M. Clary

Using geometry to do geology, “Modeling the Seafloor” is a handson activity in which students construct mathematical and physical models to represent a portion of the ocean's floor. While making a three-dimensional model of the seabed, students use fractions, decimals, conversions of decimals to fractions, scale drawings, formulas, visualization, and other skills. They see mathematics placed in a real-world context, and they use their mathematics skills as part of a process to achieve a meaningful end result.


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