Autonomous and resilient infrastructure with cognitive and self-deployable load-bearing structural components

2019 ◽  
Vol 99 ◽  
pp. 59-67 ◽  
Author(s):  
M.Z. Naser
Keyword(s):  
Structural Components ◽  
Load Bearing ◽  
Resilient Infrastructure

A probabilistic approach to bone fracture analysis

1991 ◽  
Vol 6 (1) ◽  
pp. 202-206 ◽  
Author(s):  
Ramana Sadananda
Keyword(s):  
Probabilistic Approach ◽  
Probabilistic Design ◽  
Structural Components ◽  
Weibull Statistics ◽  
Load Bearing ◽  
Weakest Link ◽  
Link Theory ◽  
Different Types ◽  
Natural Composite Materials ◽  
Natural Composite

Bones are biological structural materials made of dynamically adaptable tissues. They can be considered as complex natural composite materials with load bearing constituents such as osteons and interstitial lamellae cemented with weak bonding materials. In addition, they contain Haversian and Volkmann canals that are functionally needed but are structurally weak. Because of large variation in microstructure, the strength of a bone varies from bone to bone and animal to animal. In this study the applicability of Weibull statistics to fracture strength of bones has been evaluated. The statistics is based on the weakest link theory and has been used successfully for probabilistic design of critical engineering structural components. The analysis shows that the statistics is valid when applied to each type of bone and it differentiates data from different types of bones. The analysis provides an insight in terms of how nature designs its load bearing structures by the process of natural selection.

scholarly journals Analysis of One Bay Residential Building with Combined RCC Frame and Load Bearing Wall Structures

2018 ◽  
Vol 13 (1) ◽  
pp. 117-124
Author(s):  
Rajib Maharjan ◽  
Vivek Shrestha
Keyword(s):  
Cost Minimization ◽  
Load Condition ◽  
Hybrid Structure ◽  
Frame Structure ◽  
Variable Load ◽  
Actual Behavior ◽  
Structural Components ◽  
Major Purpose ◽  
Load Bearing ◽  
Transfer Pattern

 The major purpose of this study is to justify construction method of a hybrid structure in core area with construction complexity due unsafe excavation conditions and tries to define its rigidity and strength. Both RCC and Frame structure transfer same load to ground through foundation but the transfer mechanism varies. In some practical condition, building construction should be carried out in compact areas with unsafe adjoining building where adequate excavation for foundation cannot be carried out. In such cases, one bay hybrid structure is proposed for construction with combined RCC frame structure and load bearing walls. In these combined cases, both structures works as same unit to transfer building load but the transfer pattern varies. The variable load transfer pattern is due to discontinuity in structural system which also effect on seismic response of the building. The placement of a masonry load bearing structure in RCC frame structure varies design of all structural components of the building. To study actual behavior of hybrid structure in various load condition and introducing cost minimization techniques of buildings structural analysis was carried using ETABS 2016 with composite structural arrangement and with induction of load bearing wall as structural component. By which seismic behavior of building in both cases was obtained as well as reduction in rebar percentage and dimensional reduction of structural components can be achieved.Journal of the Institute of Engineering, 2017, 13(1): 117-124

Methodische Strukturentwicklung eines Großroboters/Research project „FlexGrind“

2021 ◽  
Vol 111 (09) ◽  
pp. 628-632
Author(s):  
Alexander Jentsch ◽  
Steffen Dryba ◽  
Christian Klötzer ◽  
Andre Siegrist ◽  
Armin Vincon
Keyword(s):  
Topology Optimization ◽  
Bearing Capacity ◽  
Structural Components ◽  
Load Bearing Capacity ◽  
Research Project ◽  
Load Bearing ◽  
Positioning Errors ◽  
Working Space ◽  
Process Forces ◽  
Processing Step

Die mechanische Nachbearbeitung von Propellergussrohlingen im Schiffbau ist ein manuell geprägter, zeitintensiver Bearbeitungsschritt. Eine Automatisierungslösung ist mithilfe eines Großroboters aufgrund seiner Tragfähigkeit und seines Arbeitsraumes möglich [1]. Um Positionsfehler und Schwingungsanfälligkeiten des Roboters durch auftretende Prozesskräfte zu vermeiden, sind hochsteife Strukturbauteile notwendig, für deren Entwicklung das Fraunhofer-Institut für Groß- strukturen in der Produktionstechnik (IGP) die Topologieoptimierung einsetzt.   The mechanical finishing of propeller casting blanks in shipbuilding is a manually characterized, time-intensive processing step. An automation solution is possible by means of a large robot due to its load-bearing capacity and working space. In order to avoid positioning errors and vibration susceptibility of the robot due to occurring process forces, highly rigid structural components are necessary, for the development of which Fraunhofer IGP uses topology optimization.

Electron probe x-ray microanalysis and electron microscopy of amino acid absorption and transport by the small intestine: inhibition by chemical poisons and correlation to the elemental composition of the epithelial cells

1986 ◽  
Vol 44 ◽  
pp. 134-135
Author(s):  
A. J. Tousimis
Keyword(s):  
Small Intestine ◽  
Amino Acid ◽  
Epithelial Cells ◽  
Elemental Composition ◽  
Isotope Labeling ◽  
Structural Components ◽  
X Ray ◽  
Human Small Intestine ◽  
Transport Studies

The elemental composition of amino acids is similar to that of the major structural components of the epithelial cells of the small intestine and other tissues. Therefore, their subcellular localization and concentration measurements are not possible by x-ray microanalysis. Radioactive isotope labeling: I131-tyrosine, Se75-methionine and S35-methionine have been successfully employed in numerous absorption and transport studies. The latter two have been utilized both in vitro and vivo, with similar results in the hamster and human small intestine. Non-radioactive Selenomethionine, since its absorption/transport behavior is assumed to be the same as that of Se75- methionine and S75-methionine could serve as a compound tracer for this amino acid.

Freeze-fracture cytochemistry: A goal set by Russell Steere in 1957

1993 ◽  
Vol 51 ◽  
pp. 60-61
Author(s):  
Nicholas J Severs
Keyword(s):  
Chemical Nature ◽  
Biological Systems ◽  
Freeze Fracture ◽  
Structural Components ◽  
Major Goal ◽  
Membrane Biology ◽  
Routine Application ◽  
The Future ◽  
Freeze Etching

In his pioneering demonstration of the potential of freeze-etching in biological systems, Russell Steere assessed the future promise and limitations of the technique with remarkable foresight. Item 2 in his list of inherent difficulties as they then stood stated “The chemical nature of the objects seen in the replica cannot be determined”. This defined a major goal for practitioners of freeze-fracture which, for more than a decade, seemed unattainable. It was not until the introduction of the label-fracture-etch technique in the early 1970s that the mould was broken, and not until the following decade that the full scope of modern freeze-fracture cytochemistry took shape. The culmination of these developments in the 1990s now equips the researcher with a set of effective techniques for routine application in cell and membrane biology.Freeze-fracture cytochemical techniques are all designed to provide information on the chemical nature of structural components revealed by freeze-fracture, but differ in how this is achieved, in precisely what type of information is obtained, and in which types of specimen can be studied.

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