Abstract: An isolation barrier for reducing coupling between a transmitting antenna on a platform and a receiving antenna on the same platform. The isolation barrier expands the isolation capabilities of radar absorbing material (RAM) to the low frequency region by integrating dielectric loaded corrugations with the RAM. The isolation barrier includes a plurality of corrugations, each including a channel with two conductive walls and a conductive base, having a depth greater than a quarter of the wavelength corresponding to the low-frequency limit of the shared operating frequency band of the transmitting antenna and the receiving antenna. A layer of radar absorbing material (RAM) covers the corrugations.

Abstract: An isolation barrier for reducing coupling between a transmitting antenna on a platform and a receiving antenna on the same platform. The isolation barrier expands the isolation capabilities of radar absorbing material (RAM) to the low frequency region by integrating dielectric loaded corrugations with the RAM. The isolation barrier includes a plurality of corrugations, each including a channel with two conductive walls and a conductive base, having a depth greater than a quarter of the wavelength corresponding to the low-frequency limit of the shared operating frequency band of the transmitting antenna and the receiving antenna. A layer of radar absorbing material (RAM) covers the corrugations.

Abstract: A method for detecting a concealed material in a target comprising a body and the concealed material, the method comprising: emitting radio frequency (RF) energy toward a direction of the target, capturing a signal corresponding to a scattered RF energy reflected from the target, measuring a first mean signal level in a first frequency band of the signal, measuring a second mean signal level in a second frequency band of the signal, and detecting the concealed material when the difference between the first mean signal level and the second mean signal level is above a threshold.

Abstract: A method for detecting a concealed object in a target. The target may include a body and the concealed object. The method may include emitting radio frequency (RF) energy toward a direction of the target, receiving a scattered RF energy reflected from the target, generating a signal corresponding to the received scattered RF energy, comparing the signal with a plurality of stored RF scattering signatures, and detecting the concealed object when the signal matches one of a plurality of RF scattering signatures. Each of the RF scattering signatures may be associated with an object of interest.

Abstract: A method for detecting a concealed material in a target comprising a body and the concealed material, the method comprising: emitting radio frequency (RF) energy toward a direction of the target, capturing a signal corresponding to a scattered RF energy reflected from the target, measuring a first mean signal level in a first frequency band of the signal, measuring a second mean signal level in a second frequency band of the signal, and detecting the concealed material when the difference between the first mean signal level and the second mean signal level is above a threshold.

Abstract: Lookup requests received by a domain name service (DNS) are processed based on the actual location of data associated with a requested content page rather than a domain mapping of IP addresses. A DNS server which receives a request initiates a query for the location of user data associated with the request based on an object handle contained in a domain name of the request. The location data is used to construct an IP address which is provided in response to the IP lookup request received by the DNS server. The DNS system may be used to provide IP addresses for a scaled web-based networking service, alternate versions of a service and a service implementing rolling upgrades.

Abstract: A method for detecting a concealed object in a target comprising a body and the concealed object, the method including emitting, by an emitter, radio frequency (RF) energy toward a direction of the target, receiving, by a receiver, a scattered RF energy reflected from the target, generating, by the receiver, a signal corresponding to the received scattered RF energy, comparing, by a processor, the signal with a plurality of stored RF scattering signatures, each of the RF scattering signatures being associated with an object of interest, and detecting, by the processor, the concealed object when the signal matches one of plurality of RF scattering signatures.

Abstract: Disclosed subject matter is directed to techniques and systems for analyzing a system design having a phase array antenna. In at least one implementation, component models of individual components of the phased array antenna may be provided. The component models may be arranged as a multi-dimensional lookup table (LUT) in some embodiments. A single-channel model of antenna performance may be synthesized for the system design based on the component models. An analysis of the performance of the system design may then be performed using the single-channel model of antenna performance.

Abstract: A method for registering a network application with an application programming interface (API) framework. In operation, a registrar may send a registration message that associates a namespace with the network application to the API framework. In one implementation, the namespace associated with the network application may be a uniform resource identifier. In another implementation, the registration message may specify a format of the standardized clients, a security policy, and the application resources associated with the network application.

Abstract: An apparatus for determining alignment of a first subsystem relative to a second subsystem. The apparatus includes a first antenna system for simultaneously transmitting a delta pattern radiation beam at a first frequency and a sum pattern radiation beam at a second frequency. The apparatus also includes a second antenna system for receiving the delta pattern radiation beam at the first frequency and the sum pattern radiation beam at the second frequency. The apparatus also includes a processor to process the received delta pattern radiation beam and sum pattern radiation beam to determine if a predetermined alignment criterion between the first antenna system and the second antenna system is satisfied.

Abstract: An apparatus for determining alignment of a first subsystem relative to a second subsystem. The apparatus includes a first antenna system for simultaneously transmitting a delta pattern radiation beam at a first frequency and a sum pattern radiation beam at a second frequency. The apparatus also includes a second antenna system for receiving the delta pattern radiation beam at the first frequency and the sum pattern radiation beam at the second frequency. The apparatus also includes a processor to process the received delta pattern radiation beam and sum pattern radiation beam to determine if a predetermined alignment criterion between the first antenna system and the second antenna system is satisfied.

Abstract: A method for registering a network application with an application programming interface (API) framework. In operation, a registrar may send a registration message that associates a namespace with the network application to the API framework. In one implementation, the namespace associated with the network application may be a uniform resource identifier. In another implementation, the registration message may specify a format of the standardized clients, a security policy, and the application resources associated with the network application.

Abstract: A method for providing access to a network application for a standardized client. A hypertext transfer protocol (HTTP) request may be received from a standardized client. A resource request based on the HTTP request may be created. The resource request may be sent to the network application. A response may be received from the network application. A client response may be created based on the response. The client response may be sent to the standardized client.

Abstract: Lookup requests received by a domain name service (DNS) are processed based on the actual location of data associated with a requested content page rather than a domain mapping of IP addresses. A DNS server which receives a request initiates a query for the location of user data associated with the request based on an object handle contained in a domain name of the request. The location data is used to construct an IP address which is provided in response to the IP lookup request received by the DNS server. The DNS system may be used to provide IP addresses for a scaled web-based networking service, alternate versions of a service and a service implementing rolling upgrades.

Abstract: A system and method for generating structured electronic documents in a non-linear manner are provided. A document generation server obtains a request to generate an electronic document having logically ordered sections. Proceeding according to the logical order of the electronic document, the document generation server populates at least a portion of any section having data dependent on a subsequently ordered section with a content bookmark. Thereafter, the document generation server replaces the content bookmark with the dependent data after the data for the subsequently ordered section has been obtained.

Abstract: A social networking service is integrated with a traditional communication service. The communication service may include an instant messaging service, an electronic mail service, a content page management service, or other communication service. The communication service provides one or more interfaces allowing a user to navigate and manage a contact network. A user may access several layers of contacts, and expand their contact list, by selecting additional contacts within additional contact lists.