High temperature superconductors: impact on machine design - present state of the art from an industrial manufacturer's point of view

1995 ◽  
Author(s):  
F.J. Mumford
Keyword(s):  
High Temperature ◽  
Present State ◽  
State Of The Art ◽  
High Temperature Superconductors ◽  
Point Of View ◽  
Machine Design

Some Possible Lines of Development in Aircraft Engines

1921 ◽  
Vol 25 (123) ◽  
pp. 130-165
Keyword(s):  
Present State ◽  
State Of The Art ◽  
Point Of View ◽  
Aircraft Engines ◽  
Aero Engine ◽  
The Ideal

In the following paper the writer's aim is to indicate certain possible lines of development and research which his own investigations and preliminary experiments have shown to be at least worthy of serious consideration.If we review the present state of the art we find the position to be substantially as follows :—From a thermodynamic point of view the performance of the modern aero engine has approached so nearly to the ideal obtainable from the cycle on which it operates that there is little scope for improvement.

The present state of the art in chemotherapy for soft tissue sarcomas in adults: the EORTC point of view

1995 ◽  
Vol 20 (3) ◽  
pp. 193-201 ◽  
Author(s):  
J. Verweij ◽  
H.T. Mouridsen ◽  
O.S. Nielssen ◽  
P.J. Woll ◽  
R. Somers ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Present State ◽  
State Of The Art ◽  
Soft Tissue Sarcomas ◽  
Point Of View

The Site of Action of General Anesthetics - A Chemical Approach

2005 ◽  
Vol 70 (5) ◽  
pp. 539-549 ◽  
Author(s):  
Camille Sandorfy
Keyword(s):  
Hydrogen Bonding ◽  
General Anesthesia ◽  
Intermolecular Interactions ◽  
Present State ◽  
Chemical Structure ◽  
State Of The Art ◽  
Van Der Waals Forces ◽  
Point Of View ◽  
General Anesthetics ◽  
Site Of Action

Recently Urban (Br. J. Anaesth. 2002, 89, 167) and Trudell (Br. J. Anaesth. 2002, 89, 32) assessed the present state of the art in anesthesiological research. This article is an attempt to add to the discussion some ideas from the chemist's point of view. General anesthesia is a matter of molecular associations. Among the intermolecular interactions that can be involved, weak hydrogen bonding and van der Waals forces are believed to be most important. A pluralistic view is proposed, thereby different anesthetics can choose different interactions in conformity with their chemical structure. This can involve proteins, lipids, and sugars. Special attention is given to glycoproteins and glycosphingolipids. A review with 90 references.

scholarly journals State-of-the-Art Diffusion Studies in the High Entropy Alloys

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 347 ◽  
Author(s):  
Juliusz Dąbrowa ◽  
Marek Danielewski
Keyword(s):  
High Temperature ◽  
Materials Science ◽  
Driving Forces ◽  
State Of The Art ◽  
Point Of View ◽  
High Entropy Alloys ◽  
Diffusion Effect ◽  
High Entropy ◽  
Diffusion Studies ◽  
Sluggish Diffusion

The development of the high entropy alloys (HEAs) is amongst the most important topics in the field of materials science during the last two decades. The concept of multicomponent, near-equimolar systems has been already applied to the number of other systems, including oxides, carbides, diborides, silicides, and it can be expected that other groups of materials will follow. One of the main driving forces for the development of HEAs is the so-called “four core effects”: high entropy effects, severe lattice distortion, cocktail effect, and sluggish diffusion effect. Their existence and extent has been a subject of heated discussion. Probably the least studied of them is the sluggish diffusion effect, which is of the, especially, high importance from the point of view of the most possible applications of HEAs—as high-temperature materials. Its alleged existence carries a promise of obtaining materials with superior mechanical properties, higher creep resistance, and less susceptibility to high-temperature corrosion. In the current review, the state-of-the-art of diffusion studies in HEAs was presented, as well as the resulting conclusions concerning the existence of the sluggish diffusion effect. Based on the literature analysis, it can be stated that there is no experimental evidence, which would support the existence of the sluggish diffusion in HEAs on the level of tracer and self-diffusivities. Nevertheless, it can be pointed out that our current state of knowledge on the diffusion in HEAs is still far from complete; therefore, further directions of studies are proposed.

Development of Advanced Ultra Supercritical Fossil Power Plants in Japan: Materials and High Temperature Corrosion Properties

2011 ◽  
Vol 696 ◽  
pp. 236-241 ◽  
Author(s):  
Yuji Fukuda
Keyword(s):  
High Temperature ◽  
Present State ◽  
Power Plants ◽  
Oxidation Behavior ◽  
State Of The Art ◽  
High Temperature Corrosion ◽  
Development Effort ◽  
Material Technology ◽  
Corrosion Properties ◽  
Government Project

Japanese government project of the A-USC technology was started in 2008 August. 700°C class boiler, turbine and valve technologies, which include high temperature material technology, will be developed. This report provides the present state of the art and technical background of this development effort for A-USC in Japan, especially focusing the high temperature corrosion and the steam oxidation behavior of available and developmental materials for boiler.

The Present State of the Art

1984 ◽  
Vol 29 (4) ◽  
pp. 344-346
Author(s):  
Peter A. Magaro
Keyword(s):  
Present State ◽  
State Of The Art
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