The future of terrestrial broadcasting. The short-wave super transmitter

IEE Review ◽  
1989 ◽  
Vol 35 (4) ◽  
pp. 131 ◽  
Author(s):  
James Wood
Keyword(s):  
Short Wave ◽  
The Future

The Future of Broadcasting

2011 ◽  
Author(s):  
Simon Mundy ◽  
Esmée Schilte
Keyword(s):  
High Frequency ◽  
Short Wave ◽  
Very High Frequency ◽  
Long Wave ◽  
The Future ◽  
Vantage Points ◽  
The Waves ◽  
Very High ◽  
Wrong Sort ◽  
The Way

At the end of the last century, a dictionary could confidently define broadcasting as the transmission of a signal for television or radio. Within a decade, every element of that definition had changed. Transmission had branched out from the cumbersome business of placing masts bearing receivers and transmitters at the highest vantage points across the countryside. A signal was no longer confined to the band waves that the air could carry — invisible streams snaking their way across the landscape: Ultra High Frequency (UHF) carrying television, as long as the hills weren’t in the way; Very High Frequency (VHF or FM)carrying wonderful quality sound, as long as the same hills were not joined by chimneys, bodies, the wrong sort of cloud or stonework; Long Wave, unstoppable by anything except distance, it seemed,carrying cricket and the shipping forecast across Europe and far out to sea; Medium Wave(AM), the carrier of choice for hosts of daytime local music stations and great for listening in the car, but hopeless when night fell and the waves went bouncing around the ionosphere bringing martial music from Albania where the football commentary should have been; and Short Wave — the touchiest of the wave bands, that made catching the words as hard as catching fish, but finally gave national broadcasters a global reach.

Some problems of objective-prism spectra classification

1966 ◽  
Vol 24 ◽  
pp. 51-52
Author(s):  
E. K. Kharadze ◽  
R. A. Bartaya
Keyword(s):  
Short Wave ◽  
High Quality ◽  
Stellar Spectra ◽  
Objective Prism

The unique 70-cm meniscus-type telescope of the Abastumani Astrophysical Observatory supplied with two objective prisms and the seeing conditions characteristic at Mount Kanobili (Abastumani) permit us to obtain stellar spectra of a high quality. No additional design to improve the “climate” immediately around the telescope itself is being applied. The dispersions and photographic magnitude limits are 160 and 660Å/mm, and 12–13, respectively. The short-wave end of spectra reaches 3500–3400Å.

International determination of the total motion of the pole

1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  
Secular Motion ◽  
The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

Status of the Lick Proper Motion Program

1978 ◽  
Vol 48 ◽  
pp. 387-388
Author(s):  
A. R. Klemola
Keyword(s):  
Proper Motion ◽  
The Future

Second-epoch photographs have now been obtained for nearly 850 of the 1246 fields of the proper motion program with centers at declination -20° and northwards. For the sky at 0° and northward only 130 fields remain to be taken in the next year or two. The 270 southern fields with centers at -5° to -20° remain for the future.

Some Structural Features of Metaphase Chromosomes of Mice and Men

1967 ◽  
Vol 25 ◽  
pp. 190-191
Author(s):  
Godfrey C. Hoskins ◽  
Betty B. Hoskins
Keyword(s):  
Electron Microscopy ◽  
Electron Micrographs ◽  
Structural Features ◽  
Metaphase Chromosomes ◽  
The Future ◽  
Of Mice And Men ◽  
Mouse Cells ◽  
Human And Mouse

Metaphase chromosomes from human and mouse cells in vitro are isolated by micrurgy, fixed, and placed on grids for electron microscopy. Interpretations of electron micrographs by current methods indicate the following structural features.Chromosomal spindle fibrils about 200Å thick form fascicles about 600Å thick, wrapped by dense spiraling fibrils (DSF) less than 100Å thick as they near the kinomere. Such a fascicle joins the future daughter kinomere of each metaphase chromatid with those of adjacent non-homologous chromatids to either side. Thus, four fascicles (SF, 1-4) attach to each metaphase kinomere (K). It is thought that fascicles extend from the kinomere poleward, fray out to let chromosomal fibrils act as traction fibrils against polar fibrils, then regroup to join the adjacent kinomere.

Freeze-fracture cytochemistry: A goal set by Russell Steere in 1957

1993 ◽  
Vol 51 ◽  
pp. 60-61
Author(s):  
Nicholas J Severs
Keyword(s):  
Chemical Nature ◽  
Biological Systems ◽  
Freeze Fracture ◽  
Structural Components ◽  
Major Goal ◽  
Membrane Biology ◽  
Routine Application ◽  
The Future ◽  
Freeze Etching

In his pioneering demonstration of the potential of freeze-etching in biological systems, Russell Steere assessed the future promise and limitations of the technique with remarkable foresight. Item 2 in his list of inherent difficulties as they then stood stated “The chemical nature of the objects seen in the replica cannot be determined”. This defined a major goal for practitioners of freeze-fracture which, for more than a decade, seemed unattainable. It was not until the introduction of the label-fracture-etch technique in the early 1970s that the mould was broken, and not until the following decade that the full scope of modern freeze-fracture cytochemistry took shape. The culmination of these developments in the 1990s now equips the researcher with a set of effective techniques for routine application in cell and membrane biology.Freeze-fracture cytochemical techniques are all designed to provide information on the chemical nature of structural components revealed by freeze-fracture, but differ in how this is achieved, in precisely what type of information is obtained, and in which types of specimen can be studied.

Jean-Luc Nancy and the Future of Philosophy

2005 ◽  
Author(s):  
B. C. Hutchens
Keyword(s):  
The Future

The future of NMR

2009 ◽  
Author(s):  
Maria Hodges
Keyword(s):  
The Future
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