Abstract: Systems and methods for improved radiation treatment planning can employ hierarchical constrained optimization with relaxed constraints also referred to herein after as expedited hierarchical constrained optimization (ECHO). The systems and methods described herein employ a combination of constrained optimization and a correction loop involving unconstrained optimization to enhance the speed and efficiency of the radiation treatment planning process and improve the accuracy and quality of resulting radiation treatment plans. The use of a hierarchical constrained optimization approach leads to less complex and faster to solve optimization problems. The correction loop allows for compensating for optimization error associated with the sequence of constrained optimizations by incorporating such error in an unconstrained optimization. Hard and soft dose volume constraints can be efficiently incorporated.

Abstract: Systems and methods for digital negatives are described. In one aspect, a digital negative is created on a computing device from a digital image. The digital image is linked to the digital negative. In response to a save operation associated with the digital image, a new digital image is generated and bi-directionally connected to the digital negative. In response to a revert operation associated with the new digital image, contents of the new digital image are replaced with contents of the digital negative.

Abstract: A method, system, and computer readable medium are provided for enabling a user and an administrator in a network environment to interactively customize administrator controls used to filter the user's online actions. The computer receives a user request to perform a blocked online action. The computer provides information about the pending request to the administrator and receives request resolution information from the administrator. The computer updates the administrator controls used to filter the user's online actions in accordance with the request resolution information.

Abstract: A method, system, and computer readable medium are provided for enabling a user and an administrator in a network environment to interactively customize administrator controls used to filter the user's online actions. The computer receives a user request to perform a blocked online action. The computer provides information about the pending request to the administrator and receives request resolution information from the administrator. The computer updates the administrator controls used to filter the user's online actions in accordance with the request resolution information.

Abstract: A method, system, and computer readable medium are provided for enabling a user and an administrator in a network environment to interactively customize administrator controls used to filter the user's online actions. The computer receives a user request to perform a blocked online action. The computer provides information about the pending request to the administrator and receives request resolution information from the administrator. The computer updates the administrator controls used to filter the user's online actions in accordance with the request resolution information.

Abstract: A method, system and medium suitable for rendering substantially instantaneously thumbnail data pre-cached in a volatile memory. The thumbnail data is rendered once an indicator or pointer is hovered over an icon that has associated thumbnail data stored in the volatile memory.

Abstract: Systems and methods for digital negatives are described. In one aspect, a digital negative is created on a computing device from a digital image. The digital image is linked to the digital negative. In response to a save operation associated with the digital image, a new digital image is generated and bi-directionally connected to the digital negative. In response to a revert operation associated with the new digital image, contents of the new digital image are replaced with contents of the digital negative.