Speed-dependent collision effects on radar back-scattering from the ionosphere

A computer code to accurately compute the fluctuation spectrum for linearly speed dependent collision frequencies was developed. The effect of ignoring the speed dependence on the estimates of ionospheric parameters was determined. It is shown that disagreements between the rocket and the incoherent scatter estimates could be partially resolved if the correct speed dependence of the i-n collision frequency is not ignored. This problem is also relevant to the study of ionospheric irregularities in the auroral E-region and their effects on the radio communication with satellites

A New Charade Crossword

In the August 1970 and August 1971 Word Ways, Ernst Theimer introduced the charade crossword to readers. The first two paragraphs below, explaining the nature of this puzzle, are repeated from the 1971 article

Another Charade Crossword

In the August 1970, August 1971 and August 1983 issues of Word Ways, Ernst Theimer introduced the charade crossword to readers. The first two paragraphs below, explaining the nature of this puzzle, are repeated from the 1971 article

Automatische Handschriftenerkennung in E-Kreide Dokumenten

Dieser Bericht ist die Zusammenfassung der gleichnamigen Bachelorarbeit [Theimer04]. Beschrieben wird ein System, das Handschrift aus Vorlesungen, die mit dem elektronischen Tafelsystem E-Kreide aufgezeichnet wurden, zum Zwecke der Indizierung für Internet Suchmaschinen erkennt. Die Umsetzung erfolgt unter Nutzung des Microsoft Tablet PC SDKs und der Google Web API. Die Eingabedaten der Vorlesung werden eingelesen, analysiert und derart aufbereitet, dass nach Möglichkeit nur einzelne Worte und vor allem keine Zeichnungen an den Erkenner weitergegeben werden. Nach dem Erkennungsprozess werden unterschiedliche Methoden zur Selektion falsch erkannter Wörter angewandt. Im Zuge der Umsetzung eines Generators für Webseiten, die den automatisch generierten Index einer E-Kreide Vorlesung beinhalten, wurden zudem Methoden zur Integration der .NET Module mit Java untersucht

Speed-dependent collision effects on radar back-scattering from the ionosphere

The question whether the differences between fluctuation spectra for linearly speed-dependent and speed-independent collision frequencies could account for disagreements between rocket and incoherent scatter estimate was addressed. The basic theory used for computing the fluctuation spectrum is outlined. The speed-dependence of the charge-neutral collision frequency is discussed, with special emphasis on its derivation from the mobility measurements. Various developments of the computer code used for the computation of the fluctuation spectrum are described. The range of values of input parameters typical to the collision-dominated ionosphere are briefly described. The computational results are presented, and the significance and limitation of these results and the future scope of the research are discussed

One More Charade Crossword

Of all crossword puzzles, I find the charade crossword the most enjoyable. in this type of crossword, the clues do not directly define the word to be found. The word is buried as a charade in a sentence

Another Charade Crossword

In the August 1970 issue of Word Ways, I introduced the reader to the charade crossword puzzle. (Actually, Word Ways readers were introduced to the charade crossword concept even earlier -- see Walter G. Leight\u27s The Cryptic Crossword in the May 1968 issue.

A Charade Crossword

Of all crossword puzzles, I find the charade crossword the most enjoyable. In this type of crossword, the clues do not directly define the word to be found. The word is buried as a charade in a sentence; for example, the word outing is contained in the seventh, eighth and ninth words of the sentence It costs money to keep a runabout in gas, every young man soon learns. If this sentence were presented as the clue, the solution would be relatively simple. Instead, the word is removed from the sentence, and a new clue sentence (or set of sentences) is formed using the remaining letters in the same order; for example, It costs money to keep a run, a base very young man soon learns (6)

Able, Baker, Charlie ...

Much time has been spent on devising lists of the best words for transmitting initial letters unambiguously (A as in Able, B as n Baker, C as in Charlie ...). Even so, mistakes occur all too frequently. What then would be the confusion if one used instead the worst possible words from Webster\u27s Second Unabridged Dictionary? This masochistic exercise, suggested by Henry Pollak of Bell Laboratories at Murray Hill, N. J., resulted in the compilation given below