Abstract: Systems and methods for enabling communications and feedback with users of virtual reality user interfaces are described. The virtual reality user interface may include a background model, a plurality of cells and subcells, and an interaction area. The interaction area may be positioned at a virtual location of the user, and the interaction area may include a border around its periphery. Responsive to various user inputs or actions, or device or system states or conditions, visual characteristics of the interaction area and border may be selected and rendered to provide communications and feedback to a user. In addition, the interaction area and border may receive voice inputs provided by users. Accordingly, the interaction area and border may provide communications and feedback with users of virtual reality user interfaces.

Abstract: Systems and methods to rapidly create, view, and modify three-dimensional experiences may include a two-dimensional content editing device and application and a three-dimensional experience viewing device and application. Using the two-dimensional content editing application, two-dimensional objects may be created, and properties of the two-dimensional objects may be defined. Using the three-dimensional experience viewing application, the two-dimensional objects may be rendered within a three-dimensional environment based on the defined properties. In this manner, three-dimensional experiences may be quickly created, viewed, modified, reviewed, and published without the need for specialized tools, training, or experience in three-dimensional modeling or programming.

Abstract: Disclosed are various embodiments for customizing an item search and browsing experience based on a delivery speed preference. A request is received from a client device for a detail page regarding a particular item offered for order. A first delivery speed option associated with the client device is identified. It is determined that the particular item cannot be delivered to a particular address associated with the client device via the first delivery speed option. A user interface is generated that indicates a second delivery speed option via which the particular item is available for delivery to the particular address. Data encoding the user interface is sent to the client device for rendering on a display.

Abstract: Disclosed are various embodiments for customizing an item search and browsing experience based on a delivery speed preference. Multiple delivery speed options are generated for a client device, and a listing of the delivery speed options are sent to the client device. A user selection of a particular delivery speed option is then received from the client device. An item search criterion is received from the client device. A listing of items selected from an electronic item database is generated based at least in part on the item search criterion and item availability via the particular delivery speed option. Data encoding the listing of items is sent to the client device for rendering on a display.

Abstract: Disclosed are various embodiments for customizing an item search and browsing experience based on a delivery speed preference. Multiple delivery speed options are generated for a client device, and a listing of the delivery speed options are sent to the client device. A user selection of a particular delivery speed option is then received from the client device. An item search criterion is received from the client device. A listing of items selected from an electronic item database is generated based at least in part on the item search criterion and item availability via the particular delivery speed option. Data encoding the listing of items is sent to the client device for rendering on a display.

Abstract: Described are tissue graft constructs that include submucosa and other extracellular matrix materials that incorporate a number of exogenous proteins. Further described are methods for making tissue graft constructs that include stripping endogenous heparin binding proteins from a porcine graft material and thereafter binding one or more human growth factors to the native heparin molecules that are retained within the graft material. Such graft materials may be used in methods for the treatment of wounds in patients.

Abstract: Described are tissue graft constructs that include submucosa and other extracellular matrix materials that incorporate a number of exogenous proteins. Further described are methods for making tissue graft constructs that include stripping endogenous heparin binding proteins from a porcine graft material and thereafter binding one or more human growth factors to the native heparin molecules that are retained within the graft material. Such graft materials may be used in methods for the treatment of wounds in patients.

Abstract: A tissue graft composition comprising bladder submucosal tissue delaminated from abluminal muscle layers and at least the luminal portion of the tunica mucosa of a segment of vertebrate urinary bladder is described. The graft composition can be implanted to replace or support damaged or diseased tissues.