Abstract:
The present invention relates to insect odorant receptor genes and methods for identifying odorant receptor genes. The invention provides nucleotide sequences of insect odorant receptor genes Or83b, amino acid sequences of their encoded proteins (including peptides or polypeptides), and related products and methods. The nucleic acids of the invention may be operatively linked to promoter sequences and transformed into host cells. Methods of production of an Or83b odorant receptor protein (e.g., by recombinant means), and derivatives and analogs thereof, are provided. Antibodies to an Or83b odorant receptor protein, and derivatives and analogs thereof, are provided. Methods for identifying molecules that bind or modulate the activity of these Or83b odorant receptor genes are provided. Molecules found to bind or modulate the activity of Or83b genes may be formulated into pest control agents by providing a carrier. In a preferred embodiment, molecules that bind or modulate the activity of an Or83b gene form one species but not others is desired. Methods to modify the insect behaviour by modifying an insect Or83b odorant are also provided.
Abstract:
A method and an apparatus for cleaning a heater bellow in a chemical vapor deposition chamber by utilizing a plug and a plug base specifically designed for such cleaning are disclosed. The apparatus consists of the plug and the plug base which can be advantageously mounted in a heater bellow for the filling of the bellow with an oxidizing fluid such as H2O2. After a suitable soaking period of the oxidizing fluid, the fluid is drained away and then deionized water is used to fill the bellow to rinse the bellow wall and to remove the oxidized compound of metal, such as WO3. During the soaking process by H2O2 or by deionized water, an inert gas such as argon may be purged through the fluid to improve its uniformity and to improve its interaction with the metal oxide deposition on the bellow wall.
Abstract:
The present invention provides an acceleration method for V/f controlled induction motor in flux-weakening region, which comprises: acquiring no-load magnetizing current Im of the induction motor at current stator frequency; selecting a smaller one of 0.5·Im(1/σ+1) and (Im2+σ)/(Im+σIm) as magnetizing current set point, in which σ is an estimated total leakage inductance coefficient; getting an error signal by subtracting the magnetizing current of the induction motor from the magnetizing current set point; determining the stator frequency for the next control period according to the error signal which is provided as a controlling variable of negative feedback. The acceleration method of the present invention can provide the maximum output torque in flux-weakening region and has a larger tolerance for the error of the estimated leakage inductance.
Abstract:
Computer systems and methods incorporate user annotations (metadata) regarding various pages or sites, including annotations by a querying user and by members of a trust network defined for the querying user into search and browsing of a corpus such as the World Wide Web. A trust network is defined for each user, and annotations by any member of a first user's trust network are made visible to the first user during search and/or browsing of the corpus. Users can also limit searches to content annotated by members of their trust networks or by members of a community selected by the user.