An anti-loosening nail exclusively for wood includes an annular fix plate, a recess formed on an upper surface of the annular fix plate, and a hollow post extending down from the center section of the fix plate. One embodiment of a system providing bandwidth-on-demand services includes a next-generation optical transport network having an intelligent control plane and new-generation synchronous optical network capabilities. The cache servers are configured to respond to an anycast address for the content delivery network, to receive a request for content from a client system, and provide the content to the client system. The shell portion has two gas inlet orifices, one on each side of the median place.