Functional Relationship of Parameters in Different Theoretical Models for Ground Settlement Caused by Shield Tunneling

2019 ◽  
Vol 24 (1) ◽  
pp. 310-321 ◽  
Author(s):  
Shuan Hu Li ◽  
Chi Li ◽  
De Yao
Keyword(s):  
Functional Relationship ◽  
Theoretical Models ◽  
Ground Settlement ◽  
Shield Tunneling ◽  
Relationship Of

Functional Relationship of Polymerization Sites of Vertebrate Fibrinogens

1979 ◽  
Author(s):  
C Cierniewski ◽  
T Krajewski ◽  
E Janiak
Keyword(s):  
Gel Electrophoresis ◽  
Functional Relationship ◽  
Polyacrylamide Gel Electrophoresis ◽  
Polyacrylamide Gel ◽  
Functional Similarity ◽  
Fractionation Method ◽  
Relationship Of ◽  
Fibrin Monomers ◽  
Fibrinogen Molecule ◽  
Cold Ethanol Fractionation

Various studies on the interaction of immobilized mammalian fibrinogen and fibrin monomers with some fibrinogen derivatives demonstrated the presence of two sets of polymerization sites in the mammalian fibrinogen molecule. We obtained the same results while investigating the fibrinogen molecules of other classes of vertebrates /Pisces. Amphibia. Aves/. Despite significant differences among their subunit structures, all of them contain polymerization sites homologous to mammalian counterparts. Moreover, due to great functional similarity, fibrinogen or fibrin monomers of the analyzed species of Pisces. Amphibia. Aves and Mammalia interacted in a specific way with immobilized pig fibrin monomers or fibrinogen, respectively. Using these pig affinity adsorbents, fibrinogen and fibrin monomers of different vertebrates were isolated directly from plasma and analyzed by SDS polyacrylamide gel electrophoresis. Polypeptide compositions of eluted proteins were identical to those obtained for corresponding fibrinogen preparations isolated by cold-ethanol fractionation method. It appears to indicate that the nature of polymerization sites in vertebrate fibrinogens is alike.

STEM Education Problem Through Striking Differences Between Physics and Biology

2019 ◽  
Author(s):  
Adib Rifqi Setiawan
Keyword(s):  
Nature Of Science ◽  
Stem Education ◽  
Functional Relationship ◽  
Theoretical Models ◽  
Natural Sciences ◽  
Physical Sciences ◽  
P Values ◽  
The Third ◽  
Differences Of Opinion ◽  
Biological Education

This work argues that fundamental differences of opinion as to the nature of science affect whether the “S” in STEM can really apply to all the natural sciences, which will affect how we structure and implement improvements in STEM education. The first part of the argument deals with often-taught definitions of words like “law” and “theory” that don’t really apply to much of physics. In the second part, we notes that mathematics remains inseparable from education in the physical sciences, but this is not the case in biology. Moreover, an appreciation for the worth of mathematical or theoretical models, even disjoint from experiments, is not generally a part of biological education. The third part is “the tyranny of hypotheses.” One of the “cultural” shocks I’ve had moving into biological fields is constantly hearing people talk about “hypotheses” and seeing a steady stream of bar graphs with asterisks and p-values. In physics, one almost never discusses hypotheses; rather, one test relationships between parameters, either analyzing them within some mechanistic framework, or empirically determining what the underlying functional relationship is.

Impact of Double-O-Tube Shield Tunnel Construction on Grillage Beams Foundation Frame Building

2011 ◽  
Vol 71-78 ◽  
pp. 32-36 ◽  
Author(s):  
Xin Jiang Wei ◽  
Jie Hong ◽  
Gang Wei
Keyword(s):  
Principal Stress ◽  
Differential Settlement ◽  
Shield Tunnel ◽  
Tunnel Construction ◽  
Foundation Settlement ◽  
Ground Settlement ◽  
Shield Tunneling ◽  
Frame Building ◽  
Shield Machine ◽  
The Impact

Considering the interaction of building-soil-tunnel, the grillage beams foundation frame building vertical crossed by Double-O-Tube (DOT) shield tunnel was simulated by 3D MIDAS/ GTS software, and the impact of construction on the building was analyzed. The results show that: the ground settlement trough caused by DOT shield tunnel can be fitted by peck formula; during the passage of the shield tunneling through the building, the settlement of the building increased and settlement trough was wilder; the settlement was stable and had a little rebound when shield machine already passed the building; with the increase of driving distance, the first principal stress P1 increased and then was stable; with the increase of L, the shape of foundation settlement curve changed, and the maximum differential settlement between columns increased but was small.

Sign in / Sign up

Export Citation Format

Share Document