Christopher Crowhurst

A system permitting virtual server images to be reused and repurposed to provide for different application environments for performance-based testing by providing a plurality of virtual hard drive images.

The present inventors devised, among other things, systems, methods, and software for enhancing the relevancy of content presented to users in response to queries in an online information retrieval system. One exemplary system refines a user input query by making suggestions of alternatives queries. A switchboard module converts the refined query, administers one or more searches, and collects search results from one or more search engines based on the refined query. And, a post-processor… Show more

The present inventors devised, among other things, systems, methods, and software for enhancing the relevancy of content presented to users in response to queries in an online information retrieval system. One exemplary system refines a user input query by making suggestions of alternatives queries. A switchboard module converts the refined query, administers one or more searches, and collects search results from one or more search engines based on the refined query. And, a post-processor module refines the collected search results by, for example, modifying the order of the results, removing inappropriate or undesirable content from the results, and/or applying historical performance analysis, based for example on social feedback. Show less

An example can include an apparatus for aiding walking along a surface. The example can include a foot to interface with the surface, the foot being rigid to resist bending during walking. The example can include a bendable puck fixed to the foot at an edge of the bendable puck. The example can include a handle coupled to a center portion of the bendable puck. In the example, the foot can be spaced apart from the handle, with the puck being elastically bendable to permit movement of the handle… Show more

An example can include an apparatus for aiding walking along a surface. The example can include a foot to interface with the surface, the foot being rigid to resist bending during walking. The example can include a bendable puck fixed to the foot at an edge of the bendable puck. The example can include a handle coupled to a center portion of the bendable puck. In the example, the foot can be spaced apart from the handle, with the puck being elastically bendable to permit movement of the handle with respect to the foot during walking. Show less

A system and method for computer-based testing includes a test driver that controls delivery of a computer-based test to one or more test candidates and that controls caching of test components during delivery of the test. The system includes various monitoring components, including monitoring of candidate progress, candidate performance, network bandwidth, network latency and server response, during delivery of the test and adjusting the source of the test components or the volume of the test… Show more

A system and method for computer-based testing includes a test driver that controls delivery of a computer-based test to one or more test candidates and that controls caching of test components during delivery of the test. The system includes various monitoring components, including monitoring of candidate progress, candidate performance, network bandwidth, network latency and server response, during delivery of the test and adjusting the source of the test components or the volume of the test components being cached for delivery of the test. Based upon this monitoring of the system, for example, if network communication failure is detected, the test candidate is able to continue computer-based testing while connectivity is being reestablished. Show less

A pneumatic pressure probe for use in measuring pulsatile ocular blood flow comprises a housing consisting of an air tight bearing defining a pressure chamber, a piston having an axial bore communicating with the pressure chamber, the proximal end of the piston carrying a counter balancing weight and being received in the pressure chamber and the distal end of the piston extending outwardly of the housing and carrying a disposable sensing head. A transparent membrane is integrally attached to… Show more

A pneumatic pressure probe for use in measuring pulsatile ocular blood flow comprises a housing consisting of an air tight bearing defining a pressure chamber, a piston having an axial bore communicating with the pressure chamber, the proximal end of the piston carrying a counter balancing weight and being received in the pressure chamber and the distal end of the piston extending outwardly of the housing and carrying a disposable sensing head. A transparent membrane is integrally attached to the sensing head and is substantially perpendicular to the piston axial bore and an interior channel through which light is emitted to the membrane from an LED mounted in the housing. The probe allows the patients visual axis to be aligned with the axial bore of the piston by focusing on the light source during measurement enabling the applanated comae and sensing membrane to be maintained substantially parallel and substantially perpendicular with the axial bore of the piston. Show less

A pneumatic pressure probe for use in measuring pulsatile ocular blood flow comprises a housing 1 consisting of an air tight bearing defining a pressure chamber 10, a piston 5 having an axial bore 8 communicating with the pressure chamber, the proximal end of the piston carrying a counter balancing weight 16 and being received in the pressure chamber and the distal end of the piston extending outwardly of the housing and carrying a disposable sensing head. A transparent membrane 13 is… Show more

A pneumatic pressure probe for use in measuring pulsatile ocular blood flow comprises a housing 1 consisting of an air tight bearing defining a pressure chamber 10, a piston 5 having an axial bore 8 communicating with the pressure chamber, the proximal end of the piston carrying a counter balancing weight 16 and being received in the pressure chamber and the distal end of the piston extending outwardly of the housing and carrying a disposable sensing head. A transparent membrane 13 is integrally attached to the sensing head and is substantially perpendicular to the piston axial bore 8 and an interior channel through which light is emitted to the membrane 13 from an LED 9 mounted in the housing.; The probe allows the patients visual axis to be aligned with the axial bore of the piston by focusing on the light source during measurement enabling the applanated cornea and sensing membrane to be maintained substantially parallel and substantially perpendicular with the axial bore of the piston. Show less