Robust, Generic and Efficient Construction of Envelopes of Surfaces in Three-Dimensional Spaces

2006 ◽  
pp. 792-803 ◽  
Author(s):  
Michal Meyerovitch
Keyword(s):  
Three Dimensional ◽  
Efficient Construction

scholarly journals Civil Engineering Construction Management Based on BIM Technology

2021 ◽  
Author(s):  
Jin Qiaolan, Zhang Bin
Keyword(s):  
Construction Management ◽  
Civil Engineering ◽  
Three Dimensional ◽  
Dynamic Mode ◽  
Construction Engineering ◽  
Engineering Construction ◽  
Construction Market ◽  
Whole Process ◽  
Efficient Construction

The application of BIM Technology in civil engineering construction is one of the important trends of the innovation and development of the current construction market and the realization of efficient construction. Through the application of BIM Technology in civil engineering, the whole process of engineering construction can be monitored and managed, the whole civil engineering construction level can be improved, and the quality of engineering construction can be met. In this paper, through the application of BIM Technology in the construction management of construction engineering, the information technology means, visual characteristics and dynamic mode strengthening project management model based on itself are studied. In this paper, through the three-dimensional technical means to build the model, strengthen the systematic supervision of the construction project. The experimental results show that the model can better guarantee the construction completion on schedule, improve the construction quality and reduce the construction cost.

The Architectural Concept of the Building with Low Energy Consumption

2015 ◽  
Vol 725-726 ◽  
pp. 1580-1588 ◽  
Author(s):  
Elena Perlova ◽  
Svetlana Karpova ◽  
Xeniya Mikhailovna Rakova ◽  
Evgeny Bondarenko ◽  
Maria Platonova ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Carbon Dioxide Emissions ◽  
Energy Savings ◽  
Renewable Energy Sources ◽  
Three Dimensional ◽  
Dimensional Solution ◽  
Continuous Increase ◽  
Efficient Construction ◽  
Reduce Energy Consumption ◽  
Architectural Planning

Energy-efficient construction has been developing only since recent times; however, the field of its application is surprising. Why is it so? First, there is the continuous increase of carbon dioxide emissions into the atmosphere. In such case, there is an urgent necessity to reduce the volume of fuel consumed as a whole. Second, energy recourses become expensive due to decreasing of renewable energy sources. Consequently, energy savings become a global question. One of the areas to reduce energy consumption is housing, which consumes approximately 30 to 40% of all energy resources. Presently, there are countries that have lower intakes of energy for heating buildings already and they are entering the near future with technology of the construction of buildings with zero energy consumption. The object of this work is to design a demonstration model of a building with energy consumption close to zero. The current article describes activities that reduce energy consumption of the building by selecting the rational architectural planning and three-dimensional solution.

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

Conformation of Ribosomes from Escherichia Coli

1974 ◽  
Vol 32 ◽  
pp. 210-211
Author(s):  
M. Boublik ◽  
W. Hellmann ◽  
F. Jenkins
Keyword(s):  
Binding Sites ◽  
Ribosomal Proteins ◽  
Fluorescent Dyes ◽  
Protein Biosynthesis ◽  
Three Dimensional ◽  
Spatial Arrangement ◽  
Dimensional Structure ◽  
Complete Understanding ◽  
And Function

The present knowledge of the three-dimensional structure of ribosomes is far too limited to enable a complete understanding of the various roles which ribosomes play in protein biosynthesis. The spatial arrangement of proteins and ribonuclec acids in ribosomes can be analysed in many ways. Determination of binding sites for individual proteins on ribonuclec acid and locations of the mutual positions of proteins on the ribosome using labeling with fluorescent dyes, cross-linking reagents, neutron-diffraction or antibodies against ribosomal proteins seem to be most successful approaches. Structure and function of ribosomes can be correlated be depleting the complete ribosomes of some proteins to the functionally inactive core and by subsequent partial reconstitution in order to regain active ribosomal particles.

Ultrastructural Investigations of the Contractile Filaments of Amoebae

1974 ◽  
Vol 32 ◽  
pp. 188-189
Author(s):  
P.L. Moore
Keyword(s):  
Cytoplasmic Streaming ◽  
Three Dimensional ◽  
Freeze Fracture ◽  
Amoeboid Movement ◽  
Different Types ◽  
Chemical Conditions ◽  
Complete Interpretation

Previous freeze fracture results on the intact giant, amoeba Chaos carolinensis indicated the presence of a fibrillar arrangement of filaments within the cytoplasm. A complete interpretation of the three dimensional ultrastructure of these structures, and their possible role in amoeboid movement was not possible, since comparable results could not be obtained with conventional fixation of intact amoebae. Progress in interpreting the freeze fracture images of amoebae required a more thorough understanding of the different types of filaments present in amoebae, and of the ways in which they could be organized while remaining functional.The recent development of a calcium sensitive, demembranated, amoeboid model of Chaos carolinensis has made it possible to achieve a better understanding of such functional arrangements of amoeboid filaments. In these models the motility of demembranated cytoplasm can be controlled in vitro, and the chemical conditions necessary for contractility, and cytoplasmic streaming can be investigated. It is clear from these studies that “fibrils” exist in amoeboid models, and that they are capable of contracting along their length under conditions similar to those which cause contraction in vertebrate muscles.

Structural organization of escherichia coli ribosomes as determined by immuno electron microscopy

1978 ◽  
Vol 36 (2) ◽  
pp. 166-167 ◽  
Author(s):  
G. Stöffler ◽  
R.W. Bald ◽  
J. Dieckhoff ◽  
H. Eckhard ◽  
R. Lührmann ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Escherichia Coli ◽  
Ribosomal Proteins ◽  
Structural Organization ◽  
Three Dimensional ◽  
Ribosomal Subunit ◽  
Spatial Arrangement ◽  
Small Subunit ◽  
Antibody Binding ◽  
Immuno Electron Microscopy

A central step towards an understanding of the structure and function of the Escherichia coli ribosome, a large multicomponent assembly, is the elucidation of the spatial arrangement of its 54 proteins and its three rRNA molecules. The structural organization of ribosomal components has been investigated by a number of experimental approaches. Specific antibodies directed against each of the 54 ribosomal proteins of Escherichia coli have been performed to examine antibody-subunit complexes by electron microscopy. The position of the bound antibody, specific for a particular protein, can be determined; it indicates the location of the corresponding protein on the ribosomal surface.The three-dimensional distribution of each of the 21 small subunit proteins on the ribosomal surface has been determined by immuno electron microscopy: the 21 proteins have been found exposed with altogether 43 antibody binding sites. Each one of 12 proteins showed antibody binding at remote positions on the subunit surface, indicating highly extended conformations of the proteins concerned within the 30S ribosomal subunit; the remaining proteins are, however, not necessarily globular in shape (Fig. 1).

Ribosome Structural Organization

1974 ◽  
Vol 32 ◽  
pp. 332-333
Author(s):  
James A. Lake
Keyword(s):  
Ribosomal Proteins ◽  
Structural Organization ◽  
Three Dimensional ◽  
Small Subunit ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
Specific Antibodies ◽  
X Ray ◽  
E Coli ◽  
Complete Sequences

The understanding of ribosome structure has advanced considerably in the last several years. Biochemists have characterized the constituent proteins and rRNA's of ribosomes. Complete sequences have been determined for some ribosomal proteins and specific antibodies have been prepared against all E. coli small subunit proteins. In addition, a number of naturally occuring systems of three dimensional ribosome crystals which are suitable for structural studies have been observed in eukaryotes. Although the crystals are, in general, too small for X-ray diffraction, their size is ideal for electron microscopy.

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