Abstract: Systems and/or methods for determining the natural frequencies of rotating machinery systems, including complex rotating machinery systems such as the powertrains of vehicles powered by internal combustion engines, are disclosed. Embodiments include receiving information from a sensor related to the rotation of a component in the drivetrain (such as a rotating toothed gear), calculating a velocity of the component, calculating a transformed velocity of the component (such as by using a Fast Fourier Transform), selecting one or more shaft orders desired for analysis (such as those based on a predetermined set of likely shaft orders), selecting the amplitudes of the select shaft orders, normalizing the amplitudes, mapping the normalized amplitudes to the Hertz domain, calculating local maxima of the normalized amplitudes, and/or identifying frequencies associated with the calculated local maxima. Additional embodiments include repeating the procedures and identifying clusters of local maxima.

Abstract: A network based review management system and method for managing a plurality of enrolled websites and a plurality of review content items includes a network, a first database of enrolled websites connected to the network, and a second database of review content items connected to the network. Each of the enrolled websites of the first database is associated with one or more review content items of the second database. When one of the enrolled websites is accessed over the network, the one or more review content items from the second database are delivered over the network to the accessed one of the enrolled websites for viewing thereof and/or one or more review content items is added over the network to the second database through the accessed one of the enrolled websites.

Abstract: A network based review management system and method for managing a plurality of enrolled websites and a plurality of review content items includes a network, a first database of enrolled websites connected to the network, and a second database of review content items connected to the network. Each of the enrolled websites of the first database is associated with one or more review content items of the second database. When one of the enrolled websites is accessed over the network, the one or more review content items from the second database are delivered over the network to the accessed one of the enrolled websites for viewing thereof and/or one or more review content items is added over the network to the second database through the accessed one of the enrolled websites.

Abstract: A network based alert management system and method for managing a plurality of users, enrolled websites and a plurality of alert content items includes a network, a first database of users and enrolled websites connected to the network, and a second database of alert content items connected to the network. Each of the enrolled websites of the first database is associated with one or more alert content items of the second database. When one of the enrolled websites is accessed over the network, the one or more alert content items from the second database are presented over the network to the accessed one of the enrolled websites for viewing thereof and/or one or more alert content items is subscribed over the network to the second database through the accessed one of the enrolled websites.

Abstract: A network based review management system and method for managing a plurality of enrolled websites and a plurality of review content items includes a network, a first database of enrolled websites connected to the network, and a second database of review content items connected to the network. Each of the enrolled websites of the first database is associated with one or more review content items of the second database. When one of the enrolled websites is accessed over the network, the one or more review content items from the second database are delivered over the network to the accessed one of the enrolled websites for viewing thereof and/or one or more review content items is added over the network to the second database through the accessed one of the enrolled websites.

Abstract: A network based review management system and method for managing a plurality of enrolled websites and a plurality of review content items includes a network, a first database of enrolled websites connected to the network, and a second database of review content items connected to the network. Each of the enrolled websites of the first database is associated with one or more review content items of the second database. When one of the enrolled websites is accessed over the network, the one or more review content items from the second database are delivered over the network to the accessed one of the enrolled websites for viewing thereof and/or one or more review content items is added over the network to the second database through the accessed one of the enrolled websites.