Abstract Game theory models predict the outcome of a dyadic contest to depend on opponents’ asymmetries in three main traits: resource-holding potential (RHP), resource value (RV) and aggressiveness. Using male common wall lizards Podarcis muralis , polymorphic species showing discrete morphs (white, yellow, red), we investigated how aggressive behavior varies according change subjective RV col...

Encounter competition is interference competition in which animals directly contend for resources. Ecological theory predicts the trait that determines the resource holding potential (RHP), and hence the winner of encounter competition, is most often body size or mass. The difficulties of observing encounter competition in complex organisms in natural environments, however, has limited opportun...

explanation. Let us therefore turn to the background of the RHP-zeros and a simple example. Nonminimum phase zeros, as the engineering name indicates, originate from some strange internal phase characteristics, usually by contradictory signs of behaviour in certain frequency bands. As an example may function: P (s) = P1(s) + P2(s) = 1 s+ 1 − 2 s+ 10 = − s− 8 (s+ 1)(s+ 10) (9.73) The two transfe...

In this paper, we show that the complete set of PID controllers that stabilizes a LTI plant and achieves prescribed performance levels, can be computed from knowledge of only the frequency response (Nyquist or Bode plot) of the plant and the number of RHP poles. The result is of practical importance in many situations where transfer function or state space models are not available and a design ...

The paper presents a new methodology for optimizing the design of DC-DC converters. The magnitudes that we take into account are efficiency, ripples, bandwidth, and RHP zero placement. We apply a geometric programming approach, because the variables are positives and the constraints can be expressed in a posynomial form. This approach has all the advantages of convex optimization. We apply the ...

Absstract-The control of switching dc-dc converters is reviewed. Regarding it as a general linear quadratic regulator (LQR) problem, an innovative optimal and robust digital controller is proposed. The control strategy adopted can achieve good regulation, rejection of modest disturbances, and more significantly, the ability to cater to switching converters with RHP zeroes. This controller desig...

background: natural radiation is constantly present in the environment and is emitted from a variety of natural and artificial sources. it affects human body and environment. materials and methods: the activity concentrations of 238u, 232th and 40k have been determined by gamma ray spectrometer with an hpge detector in sediments of cauvery river, tamilnadu, india. results: the absorbed dose rat...

Single-ended primary-inductor converter (SEPIC) based differential inverters (SEPIC-BDI) have received wide concerns in renewable energy applications due to their modularity, galvanic isolation, decreased power stages, continuous input current, and step up/down capability. However, its design still has several challenges related component design, the existence of complex right half plane (RHP) ...