Abstract: A method for determining symbol boundaries in an ADSL modem, comprising receiving multi-frequency modulated signals in the time domain, wherein the multi-frequency modulated signals include a pilot signal at a pilot frequency. Performing a time-to-frequency transform on the multi-frequency modulated signals to recover the pilot signal. Iteratively computing a phase error for the pilot signal over a number of transform regions. Selecting the transform region with the lowest phase error.

Abstract: The present invention relates to the field of data communication electronics and to a wired or wireless signal transmitter or receiver and methods providing improved signal-to-noise ratio (SNR) performance for the reception of data packets transmitted in the form of symbols modulated onto a signal. More particularly, methods and methods are disclosed for detecting the preamble and symbol boundaries of received data packets encoded with OFDM and other multi-carrier symbol transmission systems. Also disclosed are combinations of sensitive preamble detection and data payload and/or signal field encoding methods to spread data redundantly, to improve reception under a low SNR condition. This invention may be applied to a variety of standards utilizing OFDM and similar technologies, including IEEE 802.11a, Hiperlan/2 and MMAC. Particular aspects of the present invention are disclosed in the claims, specification and drawings.

Abstract: A method and apparatus selects forward error correction parameters in a channel having a plurality of subchannels in a multicarrier communications system. A signal-to-noise ratio representing a subset of the subchannels is determined. A number (s) of discrete multi-tone symbols in a forward-error-correction frame, a number (z) of forward-error-correction control symbols in the discrete multitone symbol associated with the signal-to-noise ratio, a number of subchannels associated with the signal-to-noise ratio, and a net coding gain for different values of s, z, signal-to-noise ratios and numbers of subchannels is stored in a table. Forward error correction parameters of the channel are selected based on the net coding gain by applying an approximation to a subset of values in the table.

Abstract: The present invention provides a method for distinguishing bacterial from non-bacterial exacerbations of chronic lung disease. The method comprises detecting the presence of elastase in patient sputum containing secretions of the lower respiratory tract.

Abstract: Headbox transient responses for sheet weight and moisture are modeled as a combination of two sets of time constants and dead time delays. One set represents a shorter delay with faster response dynamics, the fast mode weight and moisture responses, and the other models the longer delay with slower dynamics, the slow mode weight and moisture responses. A weight and/or moisture transient model is then formed for headbox changes by combining the fast mode weight and moisture responses and the slow mode weight and moisture responses. Stock weight and moisture dynamic and delay time models are determined for operation of stock flow of the paper making machine and the stock flow is controlled in accordance with the stock weight and/or moisture models and the headbox weight transient and/or moisture transient model to compensate for weight and moisture changes in a web of paper being manufacture which weight and moisture changes result from headbox changes.

Abstract: For a web color change, at least one current dye rate is determined and at least one nominal dye rate for the new web color is retrieved. The difference between the current dye rate and the nominal dye rate is used in a dye rate change response to change the dye rate thereby changing the web color from a first to a second color. The dry rate change response is boosted to achieve a faster rate of color change. Dye rates required for color targets are determined by accumulating historical data of production dye rates that are combined with current dye rate data to arrive at new nominal dye rates for web colors to be produced. A retrieved nominal dye rate and the current dye rate are combined using a filter factor, &agr;, (0≦&agr;≦1), defining the fraction of the historical dye rate which is combined with the remaining fraction of the active dye rate to determine a new nominal dye rate stored as the nominal dye rate for the given product color.

Abstract: A method and apparatus for the detection of one or more telephone off-hook conditions using an analog-to-digital converter to detect voltage changes between tip and ring lines of a telephone network loop. An isolation network provides substantial electrical isolation for a detection device from voltage surges on the tip and ring lines of a “plain old telephone system” (POTS) network. The isolation network also provides a minimal load on the POTS wiring system, so as not to cause a false detection of an off-hook condition by central office equipment. A gain amplifier is used to scale the tip and ring voltage to a suitable range for an analog-to-digital converter (ADC). The ADC outputs a digital voltage value to a decision-making element, such as a microprocessor, a digital signal processor, or a state machine. The decision-making element can detect when multiple POTS devices coupled to the network wiring loop go into an off-hook state.

Abstract: A method and apparatus selects forward error correction parameters in a channel having a plurality of subchannels in a multicarrier communications system. A signal-to-noise ratio representing a subset of the subchannels is determined. A number (s) of discrete multi-tone symbols in a forward-error-correction frame, a number (z) of forward-error-correction control symbols in the discrete multitone symbol associated with the signal-to-noise ratio, a number of subchannels associated with the signal-to-noise ratio, and a net coding gain for different values of s, z, signal-to-noise ratios and numbers of subchannels is stored in a table. Forward error correction parameters of the channel are selected based on the net coding gain by applying an approximation to a subset of values in the table.

Abstract: The present invention provides a method for distinguishing bacterial from non-bacterial exacerbations of chronic lung disease. The method comprises detecting the presence of elastase in patient sputum containing secretions of the lower respiratory tract.

Abstract: The current invention provides apparatus for relieving congestion associated with interfacing voice-band data, and broad-band data, with a network such as the public switched telephone network (PSTN). A hierarchical system for converting digital transmissions on a network between a first protocol and a second protocol is disclosed. The transmissions are generated by data terminals communicating in a third protocol with the network. The hierarchical system includes: interface units, a local processor, a first remote processor and a first controller. The interface units are each coupled to corresponding ones of the data terminals and each signal a call session with the corresponding data terminal. The interface units convert the transmissions from the data terminal in the third protocol to the second protocol. The local processor is switchably coupled to the interface unit and communicates with the network. The local processor converts digital transmissions from the second protocol to the first protocol.

Abstract: This invention relates to methods and compositions for producing a fusion protein comprised of Haemophilus influenzae P2 amino acid sequences, wherein in place of loop 5, or a portion thereof, is displayed a heterologous or homologous peptide sequence having biological activity. The fusion protein may be expressed on the surface of the host cell, such as in H. influenzae, which has been transformed with a fusion sequence that is operatively linked to at least one regulatory control element for expression of the fusion protein. Alternatively, the fusion protein can be purified from the host cell in the expression system, if the fusion protein remains associated with the host cell; or from the media of the expression system, if the fusion protein is a secreted form.

Abstract: Nucleotide sequences, derived from Moraxella catarrhalis, which encode one or more epitopes of outer membrane protein B1 are disclosed. Recombinant B1 protein or B1 peptides may be produce by culturing in a medium a host cell genetically engineered to contain and express a nucleotide sequence according to the present invention, and recovering the recombinant protein or peptide from the cultured host cell or culture medium. The nucleotide sequence of the present invention can also be used in molecular diagnostic assays for detecting M. catarrhalis genetic material, and in antigenic compositions for producing B1-specific amino acids.

Abstract: Compositions comprising outer membrane protein "E", and peptides and oligopeptides thereof, of Moraxella catarrhalis are described. Additionally, nucleotide sequences encoding the protein, peptide, or oligopeptide are disclosed, as well as recombinant vectors containing these sequences. Protein, peptide, or oligopeptide can be produced from host cell systems containing these recombinant vectors. Peptides and oligopeptides can also be chemically synthesized. Disclosed are the uses of the protein, peptides and oligopeptides as antigens in antigenic formulations for vaccine applications or for generating antisera of diagnostic or therapeutic use; and as antigens in diagnostic immunoassays. The nucleotide sequences are useful for constructing vectors for use as vaccines for insertions into attenuated bacteria in constructing a recombinant bacterial vaccine and for inserting into a viral vector in constructing a recombinant viral vaccine.

Abstract: Compositions comprising outer membrane protein "CD", and peptides and oligopeptides thereof, of Branhamella catarrhalis are described. Additionally, nucleotide sequences encoding the protein, peptide or oligopeptide are disclosed, as well as recombinant vectors containing these sequences. Protein, peptide or oligopeptide can be produced from host cell systems containing these recombinant vectors. Peptides and oligopeptides can also be chemically synthesized. Disclosed are the uses of the protein, peptides and oligopeptides as antigens for vaccine formulations, and as antigens in diagnostic immunoassays. The nucleotide sequences are useful for constructing vectors for use as vaccines for insertion into attenuated bacteria in constructing a recombinant bacterial vaccine, and for inserting into a viral vector in constructing a recombinant viral vaccine. Also described is the use of nucleotide sequences related to the gene encoding CD as primers and/or probes in molecular diagnostic assays for the detection of B.

Abstract: Compositions comprising outer membrane protein "CD", and peptides and oligopeptides thereof, of Branhamella catarrhalis are described. Additionally, nucleotide sequences encoding the protein, peptide or oligopeptide are disclosed, as well as recombinant vectors containing these sequences. Protein, peptide or oligopeptide can be produced from host cell systems containing these recombinant vectors. Peptides and oligopeptides can also be chemically synthesized. Disclosed are the uses of the protein, peptides and oligopeptides as antigens for vaccine formulations, and as antigens in diagnostic immunoassays. The nucleotide sequences are useful for constructing vectors for use as vaccines for insertion into attenuated bacteria in constructing a recombinant bacterial vaccine, and for inserting into a viral vector in constructing a recombinant viral vaccine. Also described is the use of nucleotide sequences related to the gene encoding CD as primers and/or probes in molecular diagnostic assays for the detection of B.

Abstract: Compositions comprising outer membrane protein "E", and peptides and oligopeptides thereof, of Moraxella catarrhalis are described. Additionally, nucleotide sequences encoding the protein, peptide, or oligopeptide are disclosed, as well as recombinant vectors containing these sequences. Protein, peptide, or oligopeptide can be produced from host cell systems containing these recombinant vectors. Peptides and oligopeptides can also be chemically synthesized. Disclosed are the uses of the protein, peptides and oligopeptides as antigens for vaccine formulations, and as antigens in diagnostic immunoassays. The nucleotide sequences are useful for constructing vectors for use as vaccines for insertions into attenuated bacteria in constructing a recombinant bacterial vaccine and for inserting into a viral vector in constructing a recombinant viral vaccine. Also described is the use of nucleotide sequences related to the gene encoding E as primers and/or probes in molecular diagnostic assays for the detection of M.

Abstract: Compositions comprising outer membrane protein "CD", and peptides thereof, of Branhamella catarrhalis are described. Additionally, nucleotide sequences encoding the protein or peptide are disclosed, as well as recombinant vectors containing these sequences. Protein or peptide can be produced from host cell systems containing these recombinant vectors. Peptides can also be chemically synthesized. Disclosed are the uses of the protein and peptides as antigens for vaccine formulations, and as antigens in diagnostic immunoassays. The nucleotide sequences are useful for inserting into a viral vector in constructing a recombinant viral vaccine. Also described is the use of nucleotide sequences related to the gene encoding CD as primers and/or probes in molecular diagnostic assays for the detection of B. catarrhalis.

Abstract: The present invention provides a method for purification of a surface exposed, immunogenic outer membrane protein of Haemophilus influenzas which is conserved amongst strains. The protein, designated P6, is relatively free of detergent, contaminating RNA and undesirable cellular components.In accordance with the present invention, there is provided a method for purifying an immunogenic outer membrane protein of H. influenzas consisting essentially of:a) suspending H.

Abstract: A plasmid which contains a genetic code for an immunogenic portion which is conserved in many strains of nontypable Haemophilus influenzae and the bacterium containing this plasmid is disclosed. The immunogenic portion is preferably an epitope on an outer membrane protein of H. influenzae. A monoclonal antibody to the immunogenic portion and the hybridoma which will produce the monoclonal antibody is also included. The invention further includes a DNA probe constructed to correspond to the nucleic acids which code for the immunogenic portion. This probe may be labelled with a radioactive marker and may be used as a diagnostic tool to assay various clinical samples for the presence of H. influenzae.

Abstract: Driver and receiver circuits for a differential-signal electrical interface contain comparators and resistive networks to eliminate the need for operational amplifiers, thus lowering cost and raising reliability. The preferred embodiments for the driver and receiver are optimized for use with transistor-transistor logic (TTL) signals and the International Telegraph and Telephone Consultative Committee (CCITT) 1985 Recommendation V.35, which recommendation was designed for use with wideband modems.