Improved phase locked loop receiver

Improved phase locked loop receiver tracks and demodulates a signal whose signal-to-noise ratio may be low and whose information sidebands are close in frequency. This receiver recovers the carrier from input signals and applies it to a demodulator which recovers the sidebands

Time-dependent evolution of two coupled Luttinger liquids

We consider two disconnected Luttinger liquids which are coupled at $t=0$ through chiral density-density interactions. Both for $t<0$ and $t \geq 0$ the system is exactly solvable by means of bosonization and this allows to evaluate analytically the time-dependence of correlation functions. We find that in the long-time limit the critical exponent governing the one-particle correlation function differs from the exponent dictated by the equilibrium ground state of the coupled system. We also discuss how this reflects on some physical quantities which are accessible in real experiments.Comment: 6 pages, 1 eps fig, revised version accepted for publication in Phys. Rev.

A stochastic epidemiological model and a deterministic limit for BitTorrent-like peer-to-peer file-sharing networks

In this paper, we propose a stochastic model for a file-sharing peer-to-peer network which resembles the popular BitTorrent system: large files are split into chunks and a peer can download or swap from another peer only one chunk at a time. We prove that the fluid limits of a scaled Markov model of this system are of the coagulation form, special cases of which are well-known epidemiological (SIR) models. In addition, Lyapunov stability and settling-time results are explored. We derive conditions under which the BitTorrent incentives under consideration result in shorter mean file-acquisition times for peers compared to client-server (single chunk) systems. Finally, a diffusion approximation is given and some open questions are discussed.Comment: 25 pages, 6 figure

Alien Registration- Daley, Wilfrid T. (Augusta, Kennebec County)

https://digitalmaine.com/alien_docs/17320/thumbnail.jp

Growth and Reproduction of Atlantic Chub Mackerel (\u3ci\u3eScomber colias\u3c/i\u3e) in the Northwest Atlantic

Recent efforts to manage Atlantic Chub Mackerel (Scomber colias) in the northwest Atlantic have necessitated the description of the stocks life-history characteristics. The purpose of this study was to address the absence of regional information on growth and reproduction. Growth models were fit in a Bayesian framework. The length-at-age relationship was described using four non-linear candidate growth models, which were fit to total length (TL, cm) and age estimates (y). Age estimates were derived from whole otoliths for adults (n = 422) and ages of one month were assigned to larval fish (n = 60). The three-parameter VBGF was selected as the best candidate model using Deviance Information Criterion = 33.56 cm TL, k = 1.75 y-1, t0 = 1,136) to describe the weight-at-length relationship (a = 0.0258, b = 2.72). Sex and maturity were evaluated using histological techniques. A two-parameter logistic function was fit to length measurements (cm) and maturity estimates (n =151) to describe length-specific maturity for females (r = 0.38 cm-1, L50 = 27.39 cm TL). Age-at-50% maturity was estimated as 2.16 (y) by back calculation. Spawning season was estimated to occur during the months of January to April, using histological indicators and evidence of spawning from analysis of historical data on larval fish collections and commercial catch. These results can be used to inform the effective management of the Atlantic Chub Mackerel stock in the northwest Atlantic

Social Planning In Halifax-Dartmouth: Fact or Fiction?

Social planning is a by-product of the recent trend toward comprehensive community development planning. It is still in its formative stages and is therefore experiencing the growing pains characteristic of most new planning processes, including poor coordination, distrust and misunderstanding. Added to these difficulties is a second deterrent to proper social planning, namely, an increasing demand to react quickly to problems and make decisions without waiting for input from planners