A new concept for quadrature coupling of LC oscillators is introduced and demonstrated on a 5GHz CMOS VCO. It uses injection-locking through commonmode inductive coupling to enforce quadrature. The technique provides quadrature over a wide tuning range without introducing any phase noiseor power consumption increase. The realized VCO is tunable between 4.6GHz and 5.2GHz and measures a phase noi...

We discuss the notion of Liapunov exponent for integrate-and-fire (IF) type dynamical systems. In contrast to smooth flows there is a contribution to the IF Liapunov exponent arising from the discontinuous nature of the firing mechanism. Introducing the notion of an IF mode-locked state we are able to show that linear stability is consistent with the requirement of a negative IF Liapunov expone...

This review examines ultradian oscillatory growth in the multicellular organs of higher plants. My objective is to derive insight about the underlying physiological processes powering expansion. If the process of diffuse growth is inherently oscillatory, then it is reasonable to expect entrainment of these cellular oscillators across a tissue and the emergence of coherent macroscopic growth osc...

Cognitive theories of dialogue hold that entrainment, the automatic alignment between dialogue partners at many levels of linguistic representation, is key to facilitating both production and comprehension in dialogue. In this paper we examine novel types of entrainment in two corpora—Switchboard and the Columbia Games corpus. We examine entrainment in use of high-frequency words (the most comm...

[1] We performed laboratory experiments of thermochemical convection in order to determine the rate at which an initially density-stratified, and hence layered, mantle will be homogenized. In the experiments, two layers of fluid with similar viscosities are superposed and heated from below. Initially, in the ‘‘stratified’’ regime, mechanical entrainment into both layers occurs by viscous coupli...

We present a phase locking scheme that enables the demonstration of a practical dual pump degenerate phase sensitive amplifier for 10 Gbit/s non-return to zero amplitude shift keying signals. The scheme makes use of cascaded Mach Zehnder modulators for creating the pump frequencies as well as of injection locking for extracting the signal carrier and synchronizing the local lasers. An in depth ...

To extend the realm of application of the well known controller design technique of interconnection and damping assignment passivity–based control (IDA–PBC) of mechanical systems two modifications to the standard method are presented in this article. First, similarly to [1], it is proposed to avoid the splitting of the control action into energy–shaping and damping injection terms, but instead ...

Kazuya Nagata, M,D,, D,M.Sc., Tomio Sasaki, M.D., D.M,Sc,, Takashi Mori, D,V,M., Hirofumi Nikaido, M.D., Eiichi Kobayashi, M.D., Phyo Kim, M.D., Ph.D., and Takaaki Kirino, M.D., D,M,Sc, Department of IVeurosurgerx ShouJa Generut HbspitaL 7bdyo, Jlripan; Depaitment of IVeurosurgeiM facutty of Medicine, Uhiversity of 7bkyo, 7bdyo, .ldpan; Division of Ptithotogy institute of Gerontolog}l Nippon Me...

The temperature profiles of magnetically confined plasmas can display distinctive longlived pedestals at the edge and internally. Here we show that such structures can arise naturally through avalanching transport in a sandpile model. A single control parameter that is constant across the sandpile determines the occurrence and regularity of these effects, as well as the entrainment of global co...

To understand / evaluate behaviour of these complex jets freestream interactions, experiments were carried out in the freestream Mach number range of 0.6 to 1.8 varying jet pressure ratios in the range of 1 to about 15 on a twin jet afterbody configuration. Test results show that afterbody total drag in general increased (for the Mach number range of this investigation) with the increase in jet...