The Effect of Two Different Sterilization Methods on the Surface Topography of Different Types of Endodontic Files

2015 ◽  
Vol 18 (2) ◽  
pp. 45-49
Author(s):  
Hoda Raafat Yousri ◽  
Shehab Eldin M. Saber ◽  
Ahmed Abd El Rahman
Keyword(s):  
Surface Topography ◽  
Different Types

Relating Friction in CMP to Topography Evolution

2005 ◽  
Author(s):  
Xiaolin Xie ◽  
Duane Boning
Keyword(s):  
Surface Topography ◽  
Integrated Circuit ◽  
Friction And Wear ◽  
Shallow Trench Isolation ◽  
Integrated Circuit Manufacturing ◽  
Scale Models ◽  
Trench Isolation ◽  
Model Predictions ◽  
Different Types ◽  
Dual Material

Die-scale models of chemical-mechanical polishing (CMP) have been previously reported for a number of different CMP processes used in integrated circuit manufacturing, including oxide, dual material shallow trench isolation, and dual material copper damascene processes. These models can dynamically predict the evolution of surface topography (e.g., local feature step heights, film thickness nonuniformity across the different pattern density regions of the chip, dishing, and erosion) for any time point during CMP. This topography evolution information can be applied to better understand the basis for observed friction and wear in the CMP process. In this work, we explore models of the macroscopic frictional force based on the surface topography. CMP endpoint measurements, such as those from motor current traces, enable verification of model predictions relating friction to CMP surface topography evolution, for different types of CMP processes and patterned chips.

Changes of Surface Topography During Running-In Process

2004 ◽  
Vol 126 (3) ◽  
pp. 620-625 ◽  
Author(s):  
Yeau-Ren Jeng ◽  
Zhi-Way Lin ◽  
Shiuh-Hwa Shyu
Keyword(s):  
Surface Roughness ◽  
Theoretical Model ◽  
Surface Topography ◽  
Experimental Results ◽  
Wear Model ◽  
Initial Height ◽  
Different Types

This study investigated the surface topographical changes during running-in. A theoretical model, which is composed of Johnson translatory system and a microscopic wear model, was used to describe the changes of surface roughness during running-in for general surfaces. Running-in tests were conducted for engine bores with different surface height distributions in order to understand surface topographical changes and validate the theory. Experimental results show that the theoretical model provides a good indication of changes of surface topography for surfaces with different types of initial height distributions.

scholarly journals Mechanical Characterisation of the Coated Roller Bearing

2019 ◽  
Vol 8 (4) ◽  
pp. 10943-10945
Keyword(s):  
Surface Topography ◽  
Roller Bearing ◽  
Coating Material ◽  
Remaining Useful Life ◽  
Rolling Bearings ◽  
Bearing Material ◽  
Mechanical Characterisation ◽  
Different Types ◽  
Useful Life ◽  
Load Conditions

Due to increase demand of rotating elements in various fields of mechanical, electronics and fluid industry there is a need for moving elements like rolling bearings. Since the supporting member is rolling bearings hence in this work we are trying to improve the performance by studying the structure of the material present in the bearing, type of optimised coating i.e by polytetra fluroethylene coating.coating an optimum layer of 0.05mm thickness and checking the performance at different speeds and various load conditions is examined .the surface topography after coating is checked using sem technique and the discussions are made. Comparison of different types of bio grease for the coated bearing material. Capturing these vibrations of the bearing using vibrometers and accelerometers and improving the remaining useful life of the bearing by changing the type of coating material.

The Effect of Two Different Sterilization Methods on the Surface Topography of Different Types of Endodontic Files

2014 ◽  
Vol 17 (14) ◽  
pp. 47-51
Author(s):  
Hoda Raafat Yousri ◽  
Shehab Eldin M. Saber ◽  
Ahmed Abd El Rahman
Keyword(s):  
Surface Topography ◽  
Different Types

The extinction time of a general birth and death process with catastrophes

1986 ◽  
Vol 23 (04) ◽  
pp. 851-858 ◽  
Author(s):  
P. J. Brockwell
Keyword(s):  
Laplace Transform ◽  
Size Distribution ◽  
Sufficient Conditions ◽  
Necessary And Sufficient Conditions ◽  
Death Process ◽  
Extinction Time ◽  
Birth And Death Process ◽  
Different Types ◽  
The Laplace Transform ◽  
Necessary And Sufficient

The Laplace transform of the extinction time is determined for a general birth and death process with arbitrary catastrophe rate and catastrophe size distribution. It is assumed only that the birth rates satisfyλ0= 0,λj> 0 for eachj> 0, and. Necessary and sufficient conditions for certain extinction of the population are derived. The results are applied to the linear birth and death process (λj=jλ, µj=jμ) with catastrophes of several different types.

Differentiating between different forms of moral obligations

2020 ◽  
Vol 43 ◽  
Author(s):  
Rajen A. Anderson ◽  
Benjamin C. Ruisch ◽  
David A. Pizarro
Keyword(s):  
Moral Character ◽  
Moral Obligations ◽  
Different Types

Abstract We argue that Tomasello's account overlooks important psychological distinctions between how humans judge different types of moral obligations, such as prescriptive obligations (i.e., what one should do) and proscriptive obligations (i.e., what one should not do). Specifically, evaluating these different types of obligations rests on different psychological inputs and has distinct downstream consequences for judgments of moral character.

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.

Study of the Molecular Architecture of Keratin Filaments by Electron Microscopy

1982 ◽  
Vol 40 ◽  
pp. 118-119
Author(s):  
U. Aebi ◽  
P. Rew ◽  
T.-T. Sun
Keyword(s):  
Electron Microscopy ◽  
Structural Organization ◽  
Cell Types ◽  
Structural Features ◽  
Molecular Architecture ◽  
The Past ◽  
Keratin Filaments ◽  
Different Types ◽  
10 Nm Filaments ◽  
Different Cell Types

Various types of intermediate-sized (10-nm) filaments have been found and described in many different cell types during the past few years. Despite the differences in the chemical composition among the different types of filaments, they all yield common structural features: they are usually up to several microns long and have a diameter of 7 to 10 nm; there is evidence that they are made of several 2 to 3.5 nm wide protofilaments which are helically wound around each other; the secondary structure of the polypeptides constituting the filaments is rich in ∞-helix. However a detailed description of their structural organization is lacking to date.

The Broad Applications of the Scanning Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 20-21
Author(s):  
C. T. Nightingale ◽  
S. E. Summers ◽  
T. P. Turnbull
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscopy ◽  
Surface Topography ◽  
Great Depth ◽  
Resolving Power ◽  
Depth Of Field ◽  
Pictorial Representations ◽  
Scanning Electron

The ease of operation of the scanning electron microscope has insured its wide application in medicine and industry. The micrographs are pictorial representations of surface topography obtained directly from the specimen. The need to replicate is eliminated. The great depth of field and the high resolving power provide far more information than light microscopy.

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