Abstract:
A medical fluid system includes a medical fluid pump; a container holding a fluid to be pumped by the medical fluid pump, the fluid at a first time having a first conductivity, the fluid at a second time having a second conductivity; and a radio frequency level sensor positioned in operable relation with the container, the radio frequency operation of the level sensor configured so as to be (i) indicative of a level of the fluid in the container and (ii) at least substantially independent of whether the fluid has the first conductivity or the second conductivity. The medical fluid system can determine the level of medical fluid by measuring the resistance, impedance or phase shift seen by the sensor.
Abstract:
A method for producing a fermentation product from a lignocellulose-containing material comprises pretreating the lignocellulose-containing material; introducing treated dissolved air flotation sludge to the pretreated lignocellulose-containing material; exposing the pretreated lignocellulose-containing material to a hydrolyzing enzyme; and fermenting with a fermenting organism to produce a fermentation product.
Abstract:
A method for producing a fermentation product from a lignocellulose-containing material comprises pretreating the lignocellulose-containing material; introducing treated dissolved air flotation sludge to the pretreated lignocellulose-containing material; exposing the pretreated lignocellulose-containing material to a hydrolyzing enzyme; and fermenting with a fermenting organism to produce a fermentation product.
Abstract:
A process for producing a fermentation product from a lignocellulose-containing material includes pre-treating the lignocellulose-containing material; introducing chitosan or a chitosan-like polymer to the pre-treated lignocellulose-containing material; exposing the pre-treated lignocellulose-containing material to an effective amount of a hydrolyzing enzyme; and fermenting with a fermenting organism to produce a fermentation product.
Abstract:
The present invention provides a method for managing transmissions in a wireless communication network (100). The method at a first node (102) of a plurality of nodes of the wireless communication network includes transmitting (304) a data frame to a second node (104) using a first transmit power level. The method further includes determining (306) whether an acknowledgement for the transmitted data frame is received from the second node. Further, the method includes determining (308) a cause of unsuccessful transmission when the acknowledgement is not received from the second node. Moreover, the method includes re-transmitting (310) the data frame to the second node using a second transmit power level when the cause of unsuccessful transmission is determined as a collision. Furthermore, the method includes setting (312) a transmit power level of the first node to a third transmit power level.
Abstract:
In a wireless network, a device monitors (310) at least one parameter that indicates collision status in the network; compares (320) the at least one parameter to a predefined control frame threshold that is based on a criterion other than packet-size; and activates (330) a control frame feature in the device for sending a control frame prior to data transmission, when the at least one parameter exceeds the control frame threshold. In an 802.11 network, the control frames are RTS (request-to-send) and CTS (clear-to-send) frames. The parameters being monitored can include: a number of acknowledgement and RTS frames detected from a hidden terminal, when the device is in a backoff state; a number of retransmission attempts by the device; and a collision rate determined and transmitted by another device in the wireless network to which the device intends to send data.
Abstract:
A mobile station establishes a schedule by which data is exchanged with an access point. The schedule allows the mobile station to use a low power mode (608) at times outside of the scheduled service periods. However, the mobile station may occasionally need to retrieve additional data from the access point, or transmit additional data to the access point, and so initiates an unscheduled service period to do so (614).
Abstract:
An access point (11) for a wireless local area network (10) transmits a beacon message during a service interval period (21). This beacon message identifies, in a preferred embodiment, those subscriber units to whom the access point will shortly be transmitting data. Subscriber units that are not identified in the beacon message and that do not have data themselves to transmit to the access point can implement a power conservation mode of operation until the next beacon message. Subscriber units that have data, such as voice information, to transmit can utilize the beacon message contents to at least estimate a likely time by when the access point will have concluded making its transmissions to the subscriber units. That estimated time can then be used to facilitate scheduling a time at which a given subscriber unit will contend for an opportunity to transmit its data to the access point. In a preferred embodiment, this scheduled transmission time can potentially occur either during a contention window that follows the service interval period or during a dynamic contention window that follows the transmissions of the access point and concludes with the conclusion of the service interval period. Subscriber units can then use intervening periods of time to effect their power conservation schemes of choice.
Abstract:
Process to supply solid particles to a fluidized bed (2) via a riser (16) which has a substantially vertical upper part terminating at an outlet opening (7) in said fluidized bed (2) and wherein the solid particles are transported towards said fluidized bed (2) in the riser (6) with a lift gas, which lift gas and solid particles are contacted at an upstream part of the riser and wherein between said upstream part and the outlet opening the interior of the riser is provided iwth a plurality of axially spaced mixing elements (8).
Abstract:
Process and apparatus to pass a mixture of solids and gas downwards through a downwardly positioned conduit (2), which conduit is internally provided with an obstruction (4) defining an opening, which opening has a smaller cross-sectional area than the cross-sectional area of the conduit (3), and wherein downstream of said obstruction gas is vented (7, 9) from the conduit (3).