Abstract: Filter assembly for a liquid medium comprising a two-piece filter housing having a first and a second housing part with a first and second end wall respectively, surrounded by a circumferential wall, said housing parts accommodating in the space defined between the end walls three layers of filter material, and with a spacer in-between having an open structure with upstanding ribs defining chambers there between and having two end planes which define abutment planes for two layers of filter material and with a passage crosswise to the plane thereof, and with between the second layer of filter material and the second end wall a third layer of filter material, in which all three layers of filter material are discrete layers, the space between the third layer of filter material and the second end wall, and the chambers in the spacer, being in connection to the filter outlet, and the space between the first layer of filter material and the first end wall being connected to the filter inlet.

Abstract: A computer-based screening instrument system and method comprising a patient interactive device coupled with a data network and an administrative server, the administrative server operatively connected to a database and a printer, wherein the administrative server is configured to serve as a screening instrument to the patient interactive device and to receive responsive information from the patient interactive device; and a triage module, wherein the screening instrument comprises a plurality of issues, an issue having a patient prompt and one or more patient selectable responses, wherein the patient interactive device, for each issue in the screening instrument, displays the related patient prompt, receive an indication of a patient selection of a related patient selectable response and transmit information representing the indication to the administrative server; wherein the administrative server receives the information and stores a patient response record comprising the information received; wherein the

Abstract: A vapor trap for detecting VOCs includes a housing, having a first end portion, a second end portion and at least one opening for receiving gas vapor. The housing is at least partially buried in ground with a vapor containment mechanism detachably connected to the first end portion of the housing. The vapor containment mechanism can be removed and replaced with a vapor sampling mechanism. An organic vapor analyzer can be connected in fluid relationship to the vapor sampling mechanism to measure VOCs. Optionally, a vacuum pump can be utilized to draw vapor into the vapor trap and then subsequently into the organic vapor analyzer. There can be a first selector valve located between the vapor sampling mechanism and the vacuum pump and a second selector valve located between the vapor sampling mechanism and the organic vapor analyzer. A preferred organic vapor analyzer is a photo-ionization detector.

Abstract: A vapor trap for detecting VOCs includes a housing, having a first end portion, a second end portion and at least one opening for receiving gas vapor. The housing is at least partially buried in ground with a vapor containment mechanism detachably connected to the first end portion of the housing. The vapor containment mechanism can be removed and replaced with a vapor sampling mechanism. An organic vapor analyzer can be connected in fluid relationship to the vapor sampling mechanism to measure VOCs. Optionally, a vacuum pump can be utilized to draw vapor into the vapor trap and then subsequently into the organic vapor analyzer. There can be a first selector valve located between the vapor sampling mechanism and the vacuum pump and a second selector valve located between the vapor sampling mechanism and the organic vapor analyzer. A preferred organic vapor analyzer is a photo-ionization detector.

Abstract: A vapor trap for detecting VOCs includes a housing, having a first end portion, a second end portion and at least one opening for receiving gas vapor. The housing is at least partially buried in ground with a vapor containment mechanism detachably connected to the first end portion of the housing. The vapor containment mechanism can be removed and replaced with a vapor sampling mechanism. An organic vapor analyzer can be connected in fluid relationship to the vapor sampling mechanism to measure VOCs. Optionally, a vacuum pump can be utilized to draw vapor into the vapor trap and then subsequently into the organic vapor analyzer. There can be a first selector valve located between the vapor sampling mechanism and the vacuum pump and a second selector valve located between the vapor sampling mechanism and the organic vapor analyzer. A preferred organic vapor analyzer is a photo-ionization detector.

Abstract: A vapor trap for detecting VOCs includes a housing, having a first end portion, a second end portion and at least one opening for receiving gas vapor. The housing is at least partially buried in ground with a vapor containment mechanism detachably connected to the first end portion of the housing. The vapor containment mechanism can be removed after a predetermined time period and replaced with a vapor sampling mechanism. An organic vapor analyzer can be connected in fluid relationship to the vapor sampling mechanism to measure VOCs. Optionally, a vacuum pump can be utilized to draw vapor into the vapor trap and then subsequently into the organic vapor analyzer. There can be a first selector valve located between the vapor sampling mechanism and the vacuum pump and a second selector valve located between the vapor sampling mechanism and the organic vapor analyzer. A preferred organic vapor analyzer is a photo-ionization detector.

Abstract: A vapor trap for detecting VOCs includes a housing, having a first end portion, a second end portion and at least one opening for receiving gas vapor. The housing is at least partially buried in ground with a vapor containment mechanism detachably connected to the first end portion of the housing. The vapor containment mechanism can be removed after a predetermined time period and replaced with a vapor sampling mechanism. An organic vapor analyzer can be connected in fluid relationship to the vapor sampling mechanism to measure VOCs. Optionally, a vacuum pump can be utilized to draw vapor into the vapor trap and then subsequently into the organic vapor analyzer. There can be a first selector valve located between the vapor sampling mechanism and the vacuum pump and a second selector valve located between the vapor sampling mechanism and the organic vapor analyzer. A preferred organic vapor analyzer is a photo-ionization detector.

Abstract: The method includes receiving a radio frequency (RF) input signal having an amplitude and a phase, adjusting the amplitude and the phase of the RF input signal to produce an adjusted RF input signal, amplifying the RF input signal to produce an RF output signal, and combining the adjusted RF input signal and the RF output signal to produce an error signal. Next, a power level of the error signal is detected, and based on the power level, automatically adjusting a gain and a phase of the RF output signal and automatically adjusting a bias of the amplifier.

Abstract: A received signal is sampled and a mean is calculated. A zero crossing sample is then located and used to locate a starting sample and the samples are read from that point forward, using sampling intervals and mean crossings, to decode the bit stream. Alternatively, first and second derivatives of the signal are calculated. A sign (.+-.) of the first derivative sample at the first zero crossing of the second derivative is used to determine the sign of a sample. The second derivative of the signal is then read, using sampling intervals and the sign of the first derivative, to decode the bit stream. In another alternative, samples are used to calculate a rolling average of the samples. The rolling average of the sample is compared to the sample to determine the logic value of the sample based upon whether the sample is above or below the rolling average.