The WW II German Defences Structures around Ploumoguer (Finistère-FR)
نویسندگان
چکیده
منابع مشابه
The HST view of the FR I / FR II dichotomy ⋆
In order to explore how the FR I / FR II dichotomy is related to the nuclear properties of radio galaxies, we studied a complete sample of 26 nearby FR II radio galaxies using Hubble Space Telescope (HST) images and compared them with a sample of FR I previously analyzed. FR I nuclei lie in the radio-optical luminosity plane along a tight linear correlation, which argues for a common synchrotro...
متن کاملColossus and the German Lorenz Cipher - Code Breaking in WW II
The Lorenz cipher system was used by the German Army High Command in World War II. It used a binary additive method for enciphering teleprinter signals. The Lorenz machine used 12 wheels each with a mutually prime number of small cams round its periphery, 501 in all. The wheels were geared together to ensure a very long repetition period. The task facing the code breaker was to find the pattern...
متن کاملThe dividing line between FR I and FR II radio–galaxies
In the radio – host galaxy optical luminosity plane FR I and FR II radio–galaxies are clearly divided. Since the optical luminosity of an elliptical galaxy is an indication of the mass of its central black hole, we propose that the FR I–FR II dividing luminosity is a function of the mass of the black hole powering the active nucleus. Furthermore, as the radio power gives an estimate of the tota...
متن کاملJet/environment Interactions of Fr-i and Fr-ii Radio Galaxies
We present the results of new XMM observations of FR-I and FR-II radio galaxies that show the importance of jet/environment interactions for both radiosource structure and the properties of the surrounding gas. The FR-I observations reveal that the distribution of hot gas determines the radio-lobe morphology, and provide evidence that the subsonic expansion of the lobes heats the surrounding ga...
متن کاملCold-formed steel structures around the world
Today, cold-formed steel (CFS) structures enjoy widespread use in many countries and design specifications, e.g., [1] and [2] are well established, even if they are ever changing! Extensive reviews of the CFS literature are available [3], [4] and more targeted research reviews also exist: [5], [6] and Chapter 13 of [7]. However, even in the last five years significant progress has been made, pa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Archaeological Discovery
سال: 2018
ISSN: 2331-1959,2331-1967
DOI: 10.4236/ad.2018.62005