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89 results about "Virtual presence" patented technology

Virtual Presence refers to the idea of extending your teaching presence through technology. An instructor with a fully virtual presence, can deliver course content, send announcements, lead discussions, engage with students and grade assignments – all from a computer connected to the internet.

Method and apparatus for maintaining the status of objects in computer networks using virtual state machines

A network appliance for monitoring, diagnosing and documenting problems among a plurality of devices and processes (objects) coupled to a computer network utilizes periodic polling and collection of object-generated trap data to monitor the status of objects on the computer network. The status of a multitude of objects is maintained in memory utilizing virtual state machines which contain a small amount of persistent data but which are modeled after one of a plurality of finite state machines. The memory further maintains dependency data related to each object which identifies parent / child relationships with other objects at the same or different layers of the OSI network protocol model. A decision engine verifies through on-demand polling that a device is down. A root cause analysis module utilizes status and dependency data to locate the highest object in the parent / child relationship tree that is affected to determine the root cause of a problem. Once a problem has been verified, a “case” is opened and notification alerts may be sent out to one or more devices. A user interface allows all objects within the network to be displayed with their respective status and their respective parent / child dependency objects in various formats.
Owner:OPTANIX INC

High-voltage direct-current power transmission multi-channel supplementary damping control method based on variable structure

The invention discloses a high-voltage direct-current power transmission multi-channel supplementary damping control method based on a variable structure. The high-voltage direct-current power transmission multi-channel supplementary damping control method has the characteristics that sub-synchronous and low frequency oscillation frequencies and damps, and a system reduced-order model are identified by a TLS-ESPRIT (Total Least Squares-Estimation of Signal Parameters via Rotational Invariance Techniques) algorithm with high operation efficiency and anti-interference capability; a variable structure control principle is combined and an attached controller containing a virtual state variable is designed; finally, a state observer is led in to eliminate the virtual state variable so as to realize an HVDC (High Voltage Direct Current) variable structure controller with an output feedback form; then a variable structure control theory is used for designing a multi-channel direct-current attached damping controller so as to reduce the mutual influences between oscillation modes; the sub-synchronous and low frequency oscillation can be inhibited synchronously. The method is efficient and feasible; the variable structure control theory has strong disturbance rejection on complicated changeable working conditions of an actual power grid; meanwhile, a multi-channel structure is utilized by using the controller to solve a coordinated control problem among the plurality of controllers; the invention provides a controller design method of an actual large power grid with very strong operability.
Owner:SICHUAN UNIV +3

Internet and wireless integrated virtual presence

A server operating a website with discrete transactional webpages identifies subject matter for a sales contract between a merchant and an inquiring party. The website is provided with an augment logon procedure for potential inquiring parties, be they offerees or offerors to a contractual relationship. As part of the logon information of the inquiring party, at least one—a preferably a plurality—of direct contact routes from the server to the offeree and/or offeror is solicited. These direct contract routes can included landline, cell phone, pager, or other direct computer to computer communication. The inquiring party initially contacts the server and identifies the subject matter of the proposed contract, for example an airline trip, the sale of an electronics item such as a TV, or a restaurant reservation and at least one other parameter required for the consummation of a contract. This information is communicated to the merchant. The merchant either accepts or rejects the proposed contract parameter and communicates this fact to the server. The server then makes direct contact to the inquiring party with indexing occurring through the provided direct contract routes until actual contact is attained to the inquiring party. During the contract formation, direct server to inquiring party contact is repeated until an actual contact is established, enabling the virtual presence of the inquiring party for a sufficient interval to establish a contract.
Owner:COMMONWEALTH INTPROP HLDG
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