Abstract: In an internal combustion engine, the use of natural gas containing hydrocarbon or hydrogen may result in backfires into the intake manifold. Thus, a flame arrestor is disclosed for insertion into intake runners of the intake manifold. The flame arrestor may comprise at least two substrates, separated by an internal air gap of 3-9 millimeters (e.g., substantially 4 millimeters). The substrates may each comprise a metallic mesh with channels. The channel of one substrate may be unaligned with the channels of the other substrate. The internal air gap and/or unaligned channels of the disclosed flame arrestor effectively quench backfires into the intake runners.

Abstract: This disclosure describes systems, methods, and apparatus for improving the cooldown time, or efficiency of cooling systems, for a low-frequency one or multi-stage pulse-tube refrigerator. More specifically, actuation is performed on the driving frequency of the oscillating pressure and flow, on flow resistance of valves in the acoustic network that terminate the LF-OPTR or LF-DIPTR, and/or on the asymmetric flow resistance of the bypass valves in a LF-DIPTR's flow network. The actuation of these parameters is informed by measurements of the output pressure or output-input differential pressure at the steady flow compressor, the temperature of each stage of the refrigerator, and the temperature difference between the final stage and upper stages of the refrigerator, to name a few non-limiting examples.

Abstract: An adjustable locking fastener comprising a post and a lever. The adjustable locking fastener includes a post, a lever and a letoff portion. The adjustable locking fastener may be quickly removed and reattached with minimal effort, and with a constant set point for the attachment.

Abstract: An adjustable locking fastener comprising a post and a lever for use in an aquarium. The adjustable locking fastener includes a post, a lever and a letoff portion. The adjustable locking fastener may be quickly removed and reattached with minimal effort, and with a constant set point for the attachment.

Abstract: A coral holder which either resides in an aquarium or in a transport container. The coral holder may be either a fixed object or an insert. The coral holder has one or more coral channels, preferably elongated channels, which accept corals or coral plug(s) held securely in place anywhere along the channel(s) until the user desires to adjust or remove the coral plug.

Abstract: The disclosure relates to a system and method for sizing of system components in a dual fuel port injection system. The system includes a pressure regulator and a safety shut-off valve that feeds a main gas rail. The gas rail is operatively connected to a gas admission valve by a gas jumper tube. The gas admission valve is operatively connected to a gas admission port in a cylinder head or to an intake runner via a gas delivery tube. The gas admission valve has an effective cross sectional area that is defined by the actual cross sectional area multiplied by a modifying coefficient. The components of the system are sized based upon the effective cross sectional area of the gas admission valve.

Abstract: The disclosure is directed to an intake system for a machine, the intake system including a connector including an inlet portion, a mixing portion and an outlet portion where the connector is configured to flow air sequentially through the inlet portion, the mixing portion and the outlet portion within the connector, a fuel admission valve input where the fuel admission valve input is connected to an outer surface of the connector and is configured to receive fuel that subsequently enters inside the connector and a fuel admission point placed within the connector. The fuel admission point is configured to receive the fuel from the fuel admission valve input and introduce the fuel inside the connector. The fuel admission point is further configured to introduce the fuel inside the connector at an angle with respect to an airflow through the connector to generate a turbulent flow and cause mixing of air and fuel.

Abstract: A method and system for authenticating users while conducting an auction via a computer system. The system can automatically authenticate users who have previously registered with the auction system and who have enabled automatic authentication. When a user is registered, the system may store authentication information in a cookie on the user's computer. When the user decides to perform a transaction (e.g., list item auction or place a bid for an item) that requires authentication, the system retrieves the stored authentication information. If automatic authentication is enabled, then the system allows the transaction to proceed without manual authentication. If, however, automatic authentication is not enabled or the system does not recognize the stored authentication information, then the system requests manual authentication. The use of automatic authentication allows a user to enter information relating to a transaction without manually entering any identification information.

Abstract: A facility for providing a gift is described. In one embodiment, the facility receives information identifying a first person that will give a gift and a second person that will receive the gift given by the first person. The facility then automatically chooses a gift to be given to the second person by the first person.

Abstract: A method and system for authenticating users while conducting an auction via a computer system. The system can automatically authenticate users who have previously registered with the auction system and who have enabled automatic authentication. When a user is registered, the system may store authentication information in a cookie on the user's computer. When the user decides to perform a transaction (e.g., list item auction or place a bid for an item) that requires authentication, the system retrieves the stored authentication information. If automatic authentication is enabled, then the system allows the transaction to proceed without manual authentication. If, however, automatic authentication is not enabled or the system does not recognize the stored authentication information, then the system requests manual authentication. The use of automatic authentication allows a user to enter information relating to a transaction without manually entering any identification information.

Abstract: A facility for providing a gift is described. In one embodiment, the facility receives information identifying a first person that will give a gift and a second person that will receive the gift given by the first person. The facility then automatically chooses a gift to be given to the second person by the first person.

Abstract: A facility for providing a gift is described. In one embodiment, the facility receives information identifying a first person that will give a gift and a second person that will receive the gift given by the first person. The facility then automatically chooses a gift to be given to the second person by the first person.

Abstract: A method and system for authenticating users while conducting an auction via a computer system. The system can automatically authenticate users who have previously registered with the auction system and who have enabled automatic authentication. When a user is registered, the system may store authentication information in a cookie on the user's computer. When the user decides to perform a transaction (e.g., list item auction or place a bid for an item) that requires authentication, the system retrieves the stored authentication information. If automatic authentication is enabled, then the system allows the transaction to proceed without manual authentication. If, however, automatic authentication is not enabled or the system does not recognize the stored authentication information, then the system requests manual authentication. The use of automatic authentication allows a user to enter information relating to a transaction without manually entering any identification information.

Abstract: A method and system for authenticating users while conducting an auction via a computer system. The system can automatically authenticate users who have previously registered with the auction system and who have enabled automatic authentication. When a user is registered, the system may store authentication information in a cookie on the user's computer. When the user decides to perform a transaction (e.g., list item auction or place a bid for an item) that requires authentication, the system retrieves the stored authentication information. If automatic authentication is enabled, then the system allows the transaction to proceed without manual authentication. If, however, automatic authentication is not enabled or the system does not recognize the stored authentication information, then the system requests manual authentication. The use of automatic authentication allows a user to enter information relating to a transaction without manually entering any identification information.

Abstract: A facility for notifying a first user about a purchase made by a second user is described. The facility detects that the second user has purchased an item. The facility further determines that the first user has a purchase notification relationship with the second user. The facility then provides to the first user a notification that the second user has purchased the item.

Abstract: In a system in which documents are generated dynamically in response to user requests, historical data is collected regarding data retrieval subtasks, such as service requests, that are performed to generate such documents. This data is used to predict the specific subtasks that will be performed to respond to specific document requests, such that these subtasks may be initiated preemptively at or near the outset of the associated document generation task. A subtask that would ordinarily be postponed pending the outcome of a prior subtask can thereby be performed in parallel with the prior subtask, reducing document generation times. In one embodiment, the historical data is included within, or is used to generate, a mapping table that maps document generation tasks (which may correspond to specific URLs) to the data retrieval subtasks that are frequently performed within such tasks.