Logarithmically modified scaling of temperature structure functions in thermal convection

Using experimental data on thermal convection, obtained at a Rayleigh number of 1.5 $\times 10^{11}$, it is shown that the temperature structure functions $$, where $\Delta T_r$ is the absolute value of the temperature increment over a distance $r$, can be well represented in an intermediate range of scales by $r^{\zeta_p} \phi (r)^{p}$, where the $\zeta_p$ are the scaling exponents appropriate to the passive scalar problem in hydrodynamic turbulence and the function $\phi (r) = 1-a(\ln r/r_h)^2$. Measurements are made in the midplane of the apparatus near the sidewall, but outside the boundary layer

Alaska Initiatives and Referenda

This article is intended to be used as a starting point for those researching initiative and referendum issues for the state of Alaska. A brief history of I&R in Alaska is followed by an overview of the process. Thepiece concludes with an annotated list of resources to begin research into Alaska I&R

Alaska Initiatives and Referenda

This article is intended to be used as a starting point for those researching initiative and referendum issues for the state of Alaska. A brief history of I&R in Alaska is followed by an overview of the process. Thepiece concludes with an annotated list of resources to begin research into Alaska I&R

Portable low profile antenna at X-band

An antenna which has been conceived as a portable system for satellite communications based on the recommendations ITU-R S.580-6 and ITU-R S.465-5 for small antennas, i.e., with a diameter lower than 50 wavelengths, is introduced. It is a planar and a compact structure with a size of 40×40×2 cm. The antenna is formed by an array of 256 printed elements covering a large bandwidth (14.7%) at X-Band with a VSWR of 1.4:1. The specification includes transmission (Tx) and reception (Rx) bands simultaneously. The printed antenna has a radiation pattern with a 3dB beamwidth of 5°, over a 31dBi gain, and a dual and an interchangeable circular polarization

[Review of] Charles V. Willie and Ronald R. Edmonds (Eds.). Black Colleges in America: Challenge, Development, Survival

This book is a collection of articles from the Black College Conference held at Harvard University in March and April of 1976. The authors are experienced administrators, teachers, and students of our nation\u27s black colleges and universities. This book attempts, through firsthand recording, through documentation of historical fact, and through analysis of governance, financing, and institutional role, to eradicate the negative images of our nation\u27s black colleges and universities

The joint declaration and the CFA agreement

Commentpublished_or_final_versio

Covariance of Time-Ordered Products Implies Local Commutativity of Fields

We formulate Lorentz covariance of a quantum field theory in terms of covariance of time-ordered products (or other Green's functions). This formulation of Lorentz covariance implies spacelike local commutativity or anticommutativity of fields, sometimes called microscopic causality or microcausality. With this formulation microcausality does not have to be taken as a separate assumption.Comment: 6 pages, section on non-local theories removed, published versio

One hypnagogic dream and the I Ching : a plausible interpretation

In this brief report I give an account of one very simple but deeply intriguing hypnagogic dream which potential meanings were subsequently unfolded and analysed by means of the I Ching, an instrument that has been reputed to have the capacity to disclose hidden meanings in the situations that are scrutinized with its help. The brief report concludes for the possibility of amplifying the hermeneutics of one dream through the I Ching

Facing up to the challenge of behavioural observation in infant hearing assessment

The ability to assess detection and discrimination of speech by infants has proved elusive. Dr Iain Jackson and colleagues discuss how new technologies and fresh approaches might offer valuable insight into young infants’ behavioural responses to sound