Abstract: This disclosure provides methods, components, devices and systems for providing a trigger signal in response to a request to send. Some aspects more specifically relate to utilizing available uplink channel bandwidth, spatial streams, or a combination thereof in response to a request to send (RTS). In some examples, a wireless station may transmit a RTS signal requesting a subchannel bandwidth of a channel bandwidth supported by the wireless access point. Additionally or alternatively, a wireless station supporting fewer spatial streams than are supported by an AP may transmit a RTS signal The wireless access point may, responsive to the RTS signal, transmit a trigger signal to multiple wireless stations allocating bandwidth of the communication channel determined to be clear with respect to the RTS, allocating a number of spatial streams supported by the AP, or a combination thereof.

Abstract: A method and apparatus are disclosed for a wireless communication device capable of scanning for radar signals while detecting and/or receiving a wireless communication signal. The wireless communication device may include a plurality of local oscillator synthesizers to allow distinct frequency bands to be used for wireless communication signals and radar detection. In some embodiments, the wireless communication device may include a radar detection physical layer (PHY) circuit to detect the presence of radar signals within a received RF signal. The radar detection PHY may have limited functionality suitable primarily for radar signal analysis and not suitable for processing (decoding) communication signals.

Abstract: Multi-layer membrane devices with reduced performance variability, and method of reducing performance variability of such devices. The variability is reduced by combining two or more membranes with similar pore sizes, and carefully selecting the upstream membrane based upon its performance rating, in order to control the performance of the overall device. Selective layering reduces the capacity range of the device when compared to random layering, with the mean capacity greater than overall population mean. The flux range also can be reduced, with the mean near the overall population mean. The LRV range also can be reduced, with the mean LRV near or higher than the overall population mean.

Abstract: Multi-layer membrane devices with reduced performance variability, and method of reducing performance variability of such devices. The variability is reduced by combining two or more membranes with similar pore sizes, and carefully selecting the upstream membrane based upon its performance rating, in order to control the performance of the overall device. Selective layering reduces the capacity range of the device when compared to random layering, with the mean capacity greater than overall population mean. The flux range also can be reduced, with the mean near the overall population mean. The LRV range also can be reduced, with the mean LRV near or higher than the overall population mean.

Abstract: Multi-layer membrane devices with reduced performance variability, and method of reducing performance variability of such devices. The variability is reduced by combining two or more membranes with similar pore sizes, and carefully selecting the upstream membrane based upon its performance rating, in order to control the performance of the overall device. Selective layering reduces the capacity range of the device when compared to random layering, with the mean capacity greater than overall population mean. The flux range also can be reduced, with the mean near the overall population mean. The LRV range also can be reduced, with the mean LRV near or higher than the overall population mean.

Abstract: The invention relates to integrity testing of porous material using a plurality of gases and to an apparatus and system for performing the same.

Abstract: The invention relates to integrity testing of porous material using a plurality of gases and to an apparatus and system for performing the same.