Abstract: A system and a method for displaying an internal component of a physical object involve receiving an image captured by a camera. The image includes an external view of the object. A position of the camera relative to the object is calculated based on the captured image. Afterwards, an image is generated using the calculated relative position. The generated image shows the object from a perspective of the camera. When the camera's perspective overlaps with a specified internal component of the object, the generated image includes the internal component. The image is output for display.

Abstract: The invention relates to a method for operating a four-stroke internal combustion engine with natural gas. In this method, at high to full torque operating conditions, the natural gas is injected directly into the cylinder of the engine toward the end of the induction stroke or at the start of the compression stroke. This may take place in particular in a crank angle range between 210° and 90° before top dead center. The efficiency of the engine is thus improved without generating a gas pressure higher than the storage pressure. It is preferable for the engine to be operated with a stoichiometric air/fuel ratio.

Abstract: A battery powered hand-held portable computer device for audible processing of messages stored at one or more remote central message facilities. A telephonic interface is included within the portable computer device. A connection between the portable computer device and the remote central message facility is automatically established in response to a connection to a telephonic network and the operation of a single switch. Thereafter, selected audio and/or digital messages from a remote central message facility are transferred to the portable computer device, digitized if necessary, and stored within random access memory or stored utilizing analog storage systems. The portable computer device preferably utilizes a limited number of tape recorder-like switches. In response to a single operation of a "start" switch, electronic messages stored in a digital format are sequentially coupled to a text-to-speech conversion application and converted to audible speech through a speaker or headphone.