We study the elastodynamics of a periodic metastructure incorporating defect pair that enforces parity-time (PT) symmetry due to judiciously engineered imaginary impedance elements - one having energy amplification (gain) and other an equivalent attenuation (loss) mechanism. show their presence affects initial band structure Hermitian leads formation numerous exceptional points (EPs) which are ...

Emergence is a fundamental property of complex systems and can be thought of as a new property or behaviour which appears due to non-linear interactions within the system; emergence may be considered to be the 'product' or by-product of the system. For example, within social systems , social capital, the World Wide Web, law and indeed civilization in general may be considered emergent, although...

Weed emergence timing: a new tool for managing weeds in crop fi elds The success of integrated weed management relies on matching control strategies to the specifi c weed problem in a fi eld. Managers must know not only which weed species (and how many) are present in a fi eld; they also must understand the distribution and development stages of these weeds throughout the fi eld. Weed control r...

Copyright © Emergence as a multilevel process has received limited research attention in the micro–meso disciplines of organizational science. Our intent is to explain the conceptual underpinnings of emergence and to advance a more dynamic, process-oriented conceptualization. We discuss emergence as a bottom-up, multilevel process and focus attention on three neglected issues: (a) emergence is ...

factors hindering the development of inundative biological control are insect rearing costs and provide an adequate amount of natural enemies at the appropriate time. storage of natural enemies is a useful technique to increase time flexibility of parasitoids production, and coincide the natural enemies release with pest outbreaks period, and also could reduce costs of mass production. another ...

OBJECTIVES/HYPOTHESIS The aim of this study was to discover the optimal effect-site concentration of remifentanil for cough prevention that does not delay awakening or cause respiratory depression during emergence from anesthesia with propofol and remifentanil in laryngomicrosurgery patients. STUDY DESIGN Prospective, randomized, controlled trial. METHODS One hundred five patients were rand...