R820T Archives Over on the SDRSharp Yahoo group, HB9AJG has posted an interesting report in a PDF file containing some measurements (Note you will need to be a member of the group to download the file titled “Some Measurements on E4000 and R820 Tuners.pdf”. Here is a Direct Mirror of the file.) quantifying the performance of both the E4000 and R820T RTL-SDR DVB-T dongles. See the discussion in the Yahoo group here. These results confirm the feeling that many RTL-SDR users have had: that the E4000 is more sensitive in the lower frequencies, and that the R820T is more sensitive in the higher frequencies, which is why it is recommended for ADS-B. The results also show that the R820T is better in terms of Image Rejection and Internal Signal Birdies. Image Rejection Because the E4000 is a Direct Conversion Receiver, it has an Image Rejection problem.
Toponymy - Wikipedia, the free encyclopedia - Waterfox Toponymy is the study of place names (toponyms), their origins, meanings, use and typology. Etymology The word "toponymy" is derived from the Greek words tópos (τόπος) ("place") and ónoma (ὄνομα) ("name"). Toponymy is itself a branch of onomastics, the study of names of all kinds.
NatGeo Mapmaker Interactive YouTube Help The URL to a YouTube video must be the full length url. To ensure you are using the correct URL, visit your video on youtube.com. The URL to your video will be in your browser's address (see photo for an example) Crisis Tweets: Natural Language Processing to the Rescue? My colleagues at the University of Colorado, Boulder, have been doing some very interesting applied research on automatically extracting “situational awareness” from tweets generated during crises. As is increasingly recognized by many in the humanitarian space, Twitter can at times be an important source of relevant information. The challenge is to make sense of a potentially massive number of crisis tweets in near real-time to turn this information into situational awareness. Using Natural Language Processing (NLP) and Machine Learning (ML), Colorado colleagues have developed a “suite of classifiers to differentiate tweets across several dimensions: subjectivity, personal or impersonal style, and linguistic register (formal or informal style).” The findings of this study were presented at the Association for the Advancement of Artificial Intelligence.
ECHELON ECHELON originally a code-name, is now used in global media and in popular culture to describe a signals intelligence (SIGINT) collection and analysis network operated on behalf of the five signatory nations to the UKUSA Security Agreement—Australia, Canada, New Zealand, the United Kingdom, and the United States. Referred to by a number of other abbreviations, including AUSCANNZUKUS and Five Eyes, it has also been described as the only software system which controls the download and dissemination of the intercept of commercial satellite trunk communications. It was created in the early 1960s to monitor the military and diplomatic communications of the Soviet Union and its Eastern Bloc allies during the Cold War, and was formally established in 1971. By the end of the 20th century, the system referred to as "ECHELON" had evolved beyond its military/diplomatic origins, to also become "... a global system for the interception of private and commercial communications
kochmorse - Koch Morse Tutor for Linux KochMorse is a easy to use morse tutor (trainer) for Linux using the Koch-mehtod. It provides a clean and modern graphical interface. The current release (version 0.99.x) is full featured and stable. Gift tax in the United States - Wikipedia, the free encyclopedia - Waterfox When a taxable gift in the form of cash, stocks, real estate, or other tangible or intangible property is made, the tax is usually imposed on the donor (the giver) unless there is a retention of an interest which delays completion of the gift. A transfer is completely gratuitous, where the donor receives nothing of value in exchange for the given property. A transfer is gratuitous in part, where the donor receives some value but the value of the property received by the donor is substantially less than the value of the property given by the donor. In this case, the amount of the gift is the difference. In the United States, the gift tax is governed by Chapter 12, Subtitle B of the Internal Revenue Code.
DengueMap Marker Color Marker color reflects the noteworthiness of events at a particular location during a given time window. An event's degree of noteworthiness is based on the significance rating of the alert provided by HealthMap users. In the absence of user ratings, the system assigns a composite score based on the disease importance and the news volume associated with the alert.