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Advanced Engineering Materials, EarlyView.Nickel‐based alloys are widely used in high‐temperature applications due to their excellent mechanical strength and oxidation resistance. However, properties such as high‐temperature strength and pronounced work‐hardening make them difficult to machine.
Soheil Rooein +2 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
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Journal of Propulsion and Power, 1999
To increase the technology readiness level of hypersonic scramjet technology, an innovative strut-based dualmoderamjetenginedesign capableofpoweringa hypersonicvehicleatspeedsfrom Mach4to 8isinvestigated.Two versions of the engine are under development: a dual-mode (ramjet/scramjet )engine formissile applicationsand a rocket-based combined cycle engine
Adam Siebenhaar +2 more
openaire +1 more source
To increase the technology readiness level of hypersonic scramjet technology, an innovative strut-based dualmoderamjetenginedesign capableofpoweringa hypersonicvehicleatspeedsfrom Mach4to 8isinvestigated.Two versions of the engine are under development: a dual-mode (ramjet/scramjet )engine formissile applicationsand a rocket-based combined cycle engine
Adam Siebenhaar +2 more
openaire +1 more source
BT Technology Journal, 1997
Failure caused by poor performance renders a system just as useless as failure caused by functional errors, and can be even more expensive to correct. For many years, performance in software systems has been achieved through a ‘fix-it-later‘ approach, using optimisation and tuning techniques. Recent evidence shows that, with the increased use of highly
N Chapman, L G Kirby
openaire +1 more source
Failure caused by poor performance renders a system just as useless as failure caused by functional errors, and can be even more expensive to correct. For many years, performance in software systems has been achieved through a ‘fix-it-later‘ approach, using optimisation and tuning techniques. Recent evidence shows that, with the increased use of highly
N Chapman, L G Kirby
openaire +1 more source
Proceedings of the third international workshop on Large-scale system and application performance, 2011
We discuss the need for a more principled approach to the management of the performance of applications for petascale platforms and outline some initial successes, related to the Blue Waters project.
Torsten Hoefler, Marc Snir
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We discuss the need for a more principled approach to the management of the performance of applications for petascale platforms and outline some initial successes, related to the Blue Waters project.
Torsten Hoefler, Marc Snir
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Performance Engineering Case Study: Heap Construction
ACM Journal of Experimental Algorithmics, 1999The behaviour of three methods for constructing a binary heap on a computer with a hierarchical memory is studied. The methods considered are the original one proposed by Williams [1964], in which elements are repeatedly inserted into a single heap; the improvement by Floyd [1964], in which small heaps are repeatedly merged to bigger heaps; and a ...
Bojesen, Jesper +2 more
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SAE Technical Paper Series, 1919
<div class="htmlview paragraph">EVERY plow in use should have 10 b.-hp. available. Every tractor engine should deliver continuously at least 33 hp. If the 330-cu. in. engine mentioned were as good as a Liberty airplane engine, it could deliver 57 hp. at 1000 r.p.m.
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<div class="htmlview paragraph">EVERY plow in use should have 10 b.-hp. available. Every tractor engine should deliver continuously at least 33 hp. If the 330-cu. in. engine mentioned were as good as a Liberty airplane engine, it could deliver 57 hp. at 1000 r.p.m.
openaire +1 more source
Putting Performance Engineering into Model-Driven Engineering: Model-Driven Performance Engineering
2008Late identification of performance problems can lead to significant additional development costs. Hence, it is necessary to address performance in several development phases by performing a performance engineering process. We show that Model-Driven Engineering (MDE) specifics can be utilised for performance engineering.
Mathias Fritzsche, Jendrik Johannes
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2003
In this chapter, you will learn some important terminology and relationships fordescribing and calculating engine performance. These performance measures includetorque, power, mean effective pressures, fuel-use efficiencies, and specific fuelconsumption.
null Carroll E. Goering +3 more
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In this chapter, you will learn some important terminology and relationships fordescribing and calculating engine performance. These performance measures includetorque, power, mean effective pressures, fuel-use efficiencies, and specific fuelconsumption.
null Carroll E. Goering +3 more
openaire +1 more source
Science, 2004
DAVIS, CALIFORNIA-- Mechanical engineer Mont Hubbard can tell athletes how to do it faster, higher, and farther. But will they listen?
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DAVIS, CALIFORNIA-- Mechanical engineer Mont Hubbard can tell athletes how to do it faster, higher, and farther. But will they listen?
openaire +1 more source