Vulnerability assessment of concrete buildings with different heights to near-source earthquakes using improved performance criteria

2016 ◽  
pp. 277-282
Author(s):  
A Mwafy ◽  
B Almurad ◽  
A Ashri
Keyword(s):  
Vulnerability Assessment ◽  
Performance Criteria ◽  
Concrete Buildings ◽  
Improved Performance

Improvement of a Forward Dynamic Predictive Human Gait Model

2019 ◽  
Author(s):  
Jessica B. Thayer ◽  
Philip A. Voglewede
Keyword(s):  
Predictive Control ◽  
Metabolic Cost ◽  
Metabolic Energy ◽  
Performance Criteria ◽  
Human Gait ◽  
Optimization Criteria ◽  
Optimization Framework ◽  
Normal Gait ◽  
The Central Nervous System ◽  
Improved Performance

Abstract Lack of understanding of human gait is detrimental to the development of gait related treatments and devices. This study improves a dynamic, predictive model of human gait which uses model predictive control (MPC) to replicate the control of the central nervous system (CNS). In this work, improved performance criteria, including metabolic cost and dynamic effort, are developed using an existing optimization framework to better mimic control of the CNS. Consistent with existing literature, incorporating dynamic effort and COM energy into the objective function improved gait simulations. This study also demonstrates COM energy and dynamic effort can both be used to predict metabolic energy consumption, which is likely the primary optimization criteria in normal gait generation.

Seismic Vulnerability Assessment of Reinforced Concrete Buildings Using Hierarchical Fuzzy Rule Base Modeling

2010 ◽  
Vol 26 (1) ◽  
pp. 235-256 ◽  
Author(s):  
Solomon Tesfamariam ◽  
Murat Saatcioglu
Keyword(s):  
Reinforced Concrete ◽  
Vulnerability Assessment ◽  
Seismic Vulnerability ◽  
Fuzzy Rule ◽  
Rule Base ◽  
Building Performance ◽  
Reinforced Concrete Buildings ◽  
Building Vulnerability ◽  
Concrete Buildings ◽  
Fuzzy Rule Base

A reliable building vulnerability assessment is required for developing a risk-based assessment and retrofit prioritization. Tesfamariam and Saatcioglu (2008) proposed a simple building vulnerability module where the building performance modifiers are in congruence with FEMA 154. This paper is an extension of the building vulnerability assessment that include detailed performance modifier in congruence with FEMA 310 that is represented in a heuristic based hierarchical structure. Some of the input parameters are obtained through a walk down survey and are subject to vagueness uncertainty that is modelled through fuzzy set theory. A knowledge base fuzzy rule base modeling is developed and illustrated for reinforced concrete buildings damaged in the 1 May 2003 Bingöl, Turkey earthquake.

Advantages of Natural Propulsive Systems

2013 ◽  
Vol 47 (5) ◽  
pp. 37-44 ◽  
Author(s):  
Frank E. Fish
Keyword(s):  
Performance Criteria ◽  
Aquatic Animals ◽  
New Developments ◽  
Marine Propulsion ◽  
Screw Propeller ◽  
Improved Performance

AbstractThe screw propeller has been the mainstay of marine propulsion, but new developments in biomimetic propulsion can provide advantages in terms of speed, maneuverability, efficiency, and stealth. The diversity of aquatic animals provides designs for drag-based paddling and lift-based oscillatory hydrofoils that can be incorporated into engineered propulsive systems for enhanced performance. While the screw propeller will remain the prominent propulsive device, the choice of alternative biomimetic propulsive systems will be dependent on particular applications, where the specifications dictate improved performance criteria.

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