Abstract: A computing device may include a display, a memory to store electronic textbook data comprising a plurality of different images associated with at least one location within the electronic textbook data, a user input device, and a processor coupled to the display, the memory, and the user input device. The processor may be configured to display the electronic textbook data with a primary image from among the plurality of different images at the at least one location on the display, and selectively replace the primary image with at least one secondary image from among the plurality of different images at the at least one location on the display based upon the user input device.

Abstract: A computing device may include a display, a memory to store electronic textbook data comprising at least one configurable problem to be solved for a system having a plurality of different parameters, a user input device, and a processor coupled to the display, the memory, and the user input device. The processor may be configured to display the electronic textbook data with the at least one configurable problem on the display, selectively change at least one of the parameters of the system to define a new solution for the at least one configurable problem based upon the user input device, and display the new solution on the display.

Abstract: A computing device may include a display, a memory to store electronic textbook data comprising at least one configurable problem to be solved using a given solution technique from among a plurality of different solution techniques, a user input device, and a processor coupled to the display, the memory, and the user input device. The processor may be configured to display the electronic textbook data with the at least one configurable problem on the display, selectively change the given solution technique for the at least one configurable problem based upon the user input device, and display a solution for the at least one configurable problem on the display responsive to the change in the given solution technique.

Abstract: A computing device may include a display, a memory to store electronic book data having a plurality of different content layers each associated with a different content difficulty level, and a processor coupled to the display and the memory. The processor may determine a selected content difficulty level for viewing of the electronic book data, and display on the display the respective content layer of the electronic book data associated with the selected content difficulty level.

Abstract: A computer system may include a plurality of computing devices each including a display, a memory to store electronic book data comprising at least one configurable problem to be solved, and a processor coupled to the display and the memory. The processor may display the electronic book data with the at least one configurable problem on the display, and apply a changeable seed value to the at least one configurable problem to change an answer associated with the at least one configurable problem.

Abstract: A computing device may include a display, a memory to store electronic textbook data comprising a plurality of different images associated with at least one location within the electronic textbook data, a user input device, and a processor coupled to the display, the memory, and the user input device. The processor may be configured to display the electronic textbook data with a primary image from among the plurality of different images at the at least one location on the display, and selectively replace the primary image with at least one secondary image from among the plurality of different images at the at least one location on the display based upon the user input device.

Abstract: A computing device may include a display, a memory to store electronic textbook data comprising at least one configurable problem to be solved using a given solution technique from among a plurality of different solution techniques, a user input device, and a processor coupled to the display, the memory, and the user input device. The processor may be configured to display the electronic textbook data with the at least one configurable problem on the display, selectively change the given solution technique for the at least one configurable problem based upon the user input device, and display a solution for the at least one configurable problem on the display responsive to the change in the given solution technique.

Abstract: A computing device may include a display, a memory to store electronic textbook data comprising at least one configurable problem to be solved for a system having a plurality of different parameters, a user input device, and a processor coupled to the display, the memory, and the user input device. The processor may be configured to display the electronic textbook data with the at least one configurable problem on the display, selectively change at least one of the parameters of the system to define a new solution for the at least one configurable problem based upon the user input device, and display the new solution on the display.

Abstract: A microgrid and methods for managing the microgrid are disclosed. A microgrid controller may determine an amount of energy generated by each of a plurality of distributed energy resources connected to the microgrid. The microgrid controller may determine an amount of energy required to power each of a plurality of loads connected to the microgrid. The microgrid controller may alter, based on the determined amount of energy generated by the each of the plurality of distributed energy resources and the amount of energy required to power each of the plurality of loads connected to the microgrid, a status of at least one of the plurality of loads connected to the microgrid.

Abstract: Interactive and real time web-based electrical circuit symbolic solvers and simulators. The invention includes an interactive and innovative graphical user interface (GUI) for creating circuit schematics and generating netlists, circuits symbolic solving and instant simulated solutions, their systems and methods. Users such as students can use GUI interfaces to remotely access a remote server controlled by educational institutions such as universities, or electronic book publishers, in order to draw, symbolically solve, and instantly simulate electrical circuits.

Abstract: Interactive electronic book operating systems and methods for displaying and allowing customization of content of scientific, engineering and other technical and professional digital books. The display screen can include icons for forward and backward page turning, generating of dynamic indexing and tables of contents, bookmarking, color themes, floating pages, highlighting, adding sticky notes, hiding selected content on the pages, quizzing the reader, lecturing the reader, tutoring the reader, showing the reader additional designs and practical relevance, and allowing the instructor to generate uniform seed numbers for problems and designs and/or allowing the instructor to generate random seed values for problems and designs.

Abstract: Interactive and real time web-based electrical circuit symbolic solvers and simulators. The invention includes an interactive and innovative graphical user interface (GUI) for creating circuit schematics and generating netlists, circuits symbolic solving and instant simulated solutions, their systems and methods. Users such as students can use GUI interfaces to remotely access a remote server controlled by educational institutions such as universities, or electronic book publishers, in order to draw, symbolically solve, and instantly simulate electrical circuits.

Abstract: Interactive and real time web-based electrical circuit symbolic solvers and simulators. The invention includes an interactive and innovative graphical user interface (GUI) for creating circuit schematics and generating netlists, circuits symbolic solving and instant simulated solutions, their systems and methods. Users such as students can use GUI interfaces to remotely access a remote server controlled by educational institutions such as universities, or electronic book publishers, in order to draw, symbolically solve, and instantly simulate electrical circuits.

Abstract: Interactive electronic book operating systems and methods for displaying and allowing customization of content of scientific, engineering and other technical and professional digital books. The systems and methods allow for a single screen for displaying digital books covering scientific and technical topics having a classical look and feel on operating platforms(such as portable laptops, desktops, and small handheld displays) that are capable of running the Java Virtual Machine. The display screen can include icon toolbars about the screen and/or directly on the screen to manipulate the pages and content of the digital book.