Abstract: An optical module includes an upper shell, a lower shell, a circuit board, and a light-emitting device. The circuit board includes a mounting hole running through a front surface and a back surface of the circuit board. The light-emitting device includes a base, a laser assembly, a translation prism, and an optical fiber coupler. The base is installed on the front surface and has an installation surface facing towards the front surface. The laser assembly and the translation prism are installed on the installation surface. The laser assembly passes through the mounting hole. The translation prism is configured to translate a laser beam located at the back side of the circuit board emitted by the laser assembly to the front side of the circuit board. The optical fiber coupler is configured to transmit the translated laser beam to outside of the optical module.

Abstract: Admission of new objects into a memory such as a web cache is selectively controlled. If an object is not in the cache, but has been requested a specified number of prior occasions (e.g., if the object has been requested at least once before), it is admitted into the cache regardless of size. If the object has not previously been requested the specified number of times, the object is admitted into the cache if the object satisfies a specified size criterion (e.g., if it is smaller than the average size of objects currently stored in the cache). To make room for new objects, other objects are evicted from the cache on, e.g., a Least Recently Used (LRU) basis. The invention could be implemented on existing web caches, on distributed web caches, in client-side web caching, and in contexts unrelated to web object caching.

Abstract: Admission of new objects into a memory such as a web cache is selectively controlled. If an object is not in the cache, but has been requested a specified number of prior occasions, it is admitted into the cache regardless of size. If the object has not previously been requested the specified number of times, the object is admitted into the cache if the object satisfies a specified size criterion. To make room for new objects, other objects are evicted from the cache on, e.g., a Least Recently Used (LRU) basis. The invention could be implemented on existing web caches, on distributed web caches, in client-side web caching, and in contexts unrelated to web object caching.