Error 404--Not Found

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:

10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.

Error 404--Not Found

Error 404--Not Found

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:

10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.

Tools of the Trade

March 2005

Catalyst monitoring

Southwest Research Institute's Universal Synthetic Gas Reactor (USGR) is a screening tool to evaluate emission catalyst formulations. The system can monitor overall catalyst performance in automotive emissions systems under a range of operating conditions and in various applications, including three-way catalysts, diesel oxidation catalysts, lean oxides of nitrogen, catalysts/traps, and sulfur traps. Other applications include selective reduction catalysts and reforming catalysts for hydrogen production. In addition to testing exhaust gas catalysts, relative durability testing can be addressed using aged, small-core catalysts. The device can simulate engine exhaust conditions for nearly all liquid and gaseous fuels including gasoline, diesel, compressed natural gas, and liquid petroleum gas. It can also simulate exhaust emissions from future high-tech vehicle concepts that do not always have hardware available for testing, such as hybrid vehicles, lean-burn engines, and homogeneous-charge compression-ignition engines.
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Error 404--Not Found

Error 404--Not Found

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:

10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.