The behavioural responses of two species of stored-product beetles, Sitophilus oryzae (L.) and Tribolium confusum Jacquelin du Val, to certain stimuli were studied in laboratory choice tests. The results of these experiments indicated that, with one species present, S. oryzae and T. confusum adults were equally attracted to traps baited with the aggregation pheromone of that species and to traps baited with both pheromones. In contrast, when both species were present, neither S. oryzae nor T. confusum showed specific behavioural trend towards a stimulus. Traps baited with 1 g of a mixture of plant extracts were significantly more attractive for both species than unbaited traps, but this response was highly influenced by the number of individuals of each species released. Traps baited with filter papers that were previously contaminated by live adults of both species were particularly attractive for S. oryzae, but not for T. confusum. Traps that contained 10 seeds damaged by S. oryzae were significantly more attractive than traps containing an oil lure or control traps for S. oryzae, but not for T. confusum. The addition of oil to the seeds did not affect the attractiveness of the trap for S. oryzae. Traps that contained 20 live S. oryzae adults were significantly more attractive than traps containing 20 dead S. oryzae adults or control traps. No significant differences were noted between traps containing 20 dead S. oryzae adults and control traps. The presence of S. oryzae adults in traps did not affect the response of T. confusum.
Low-frequency noise in MOSFETs is given mainly by 1/f-like noise and RTS (random telegraph signal) noise components, generated by charge carriers capture and emission by traps near channel. In this paper experimental results on RTS noise amplitude and mean capture and emission times are analysed as a function of applied bias and temperature and traps characteristics, such as activation energy and their position in channel are estimated. and Nízkofrekvenční šum v tranzistorech MOSFET je dán především složkami se spektrem typu 1/f a šumem RTS (random telegraph signal), vznikajícím v důsledku zachycování a uvolňování nosičů náboje na pastech v blízkosti kanálu. Článek podává souhrn experimentálních výsledků o závislosti amplitudy RTS šumu a střední doby zachycení a emise na aplikovaném napětí a teplotě, na jejich základě lze pak stanovit některé charakteristiky pastí, jako aktivační energii nebo polohu v kanálu.