منابع مشابه
Signature Adaptive Mine Detection at a Constant False Alarm Rate
A constant false alarm rate (CFAR) algorithm has been developed for use in multi-band mine detection. While it is often difficult to predict the spectral signatures of targets, the shape of the target may be known. This test exploits geometric target features and spectral differences between the target and the surrounding area. The algorithm is derived from a general statistical model of the da...
متن کاملUpdate on Pathogen Recognition Guarding the Goods. New Insights into the Central Alarm System of Plants
The discovery that one’s kitchen has been invaded by mice is often made indirectly. The holes chewed in the muesli bag and the teeth marks on the corn flakes box are a dead give away. Although you have not seen the mouse, you deploy your defensive weapons, and if successful, succeed in protecting your valuable goods from the invasion, hopefully before all of your food has been eaten. Recent res...
متن کاملGuarding the goods. New insights into the central alarm system of plants.
The discovery that one’s kitchen has been invaded by mice is often made indirectly. The holes chewed in the muesli bag and the teeth marks on the corn flakes box are a dead give away. Although you have not seen the mouse, you deploy your defensive weapons, and if successful, succeed in protecting your valuable goods from the invasion, hopefully before all of your food has been eaten. Recent res...
متن کاملAlarm Calls
Animals commonly vocalize when threatened by a predator. These signals, usually termed alarm calls (from old Italian all arme ‘to arms’ on the approach of an enemy), have continued to bewilder and fascinate for a number of reasons, the first of which is mainly practical. In animal research, it is often difficult to break down the continuous behavioral stream into discrete and meaningful units, ...
متن کاملBlooming alarm
warning that deadly new strains of tuberculosis, virtually untreatable using the drugs currently available, appear to be spreading across the globe, raising the spectre of a resurgence in a disease which for many generations has laid in the background, seemingly beaten, but which may now make a major comeback as a lethal new pathogen. The new strains are known as extreme drug-resistant TB or XD...
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: Nature
سال: 1989
ISSN: 0028-0836,1476-4687
DOI: 10.1038/340670c0