Abstract:
A container for storing two components separately and then mixing them prior to use includes a housing having an opening and a neck portion, a displaceable member, and a closure member. The housing is formed with a first compartment and a second compartment intercommunicating at the neck portion. The displaceable member has a partition wall for sealing the neck portion. The displaceable member is formed such that the partition wall moves from a non-sealing position in which the first and second compartments intercommunicate to a sealing position in which the neck portion is sealed. The displaceable member also may feature at least one conduit for allowing introduction of a component through the opening into the housing. The closure member seals the at least one conduit of the displaceable member and/or the opening of the housing. The displaceable member may be moved by rotating, pushing or pulling and may be moveable by a portion exterior to the housing. The seal formed by the partition wall of the displaceable member may be reformable, i.e., capable of being resealed. A pre-packaged, single use, two compartment container according to some embodiments of the invention have an unremovable closure member, an unreformable seal, an unfastenable closure member after it has been removed or is constructed in a manner or of materials which allow only a single use. The two-compartment container may also include a dosing assembly for dispensing a predetermined quantity of mixed formulation.
Abstract:
The present invention relates to a method and apparatus for the measurement of defects in magnetic recording disks using a logarithmic amplifier. A magnetic head senses a magnetic field of a magnetic disk and creates a read signal having a varying amplitude. The test apparatus has a squarer which receives and squares the read signal. A logarithmic amplifier coupled to the squarer converts the squared signal to a logarithmic signal. The logarithmic signal is filtered by a first filter. A second filter coupled to the logarithmic amplifier provides an average of the peaks of the logarithmic signal. A digital-to-analog converter coupled to the second filter scales the output of the second filter. The test apparatus further comprises a comparator having a first input and a second input, where the first input is coupled to the first filter, and the second input is coupled to the digital-to-analog converter. The comparator provides an output signal in response to receiving a signal from the first filter having an amplitude that is lower than an average of a predetermined number of peak values of the signal, thereby indicating an error in the disk. In another embodiment, the test apparatus is implemented using a rectifier instead of a squarer.
Abstract:
In the performance of density gradient centrifugation back mixing after centrifugation is prevented by placing a snugly fitted layering insert within the vessel. The insert is capable of supporting the body of liquid dispersion to be centrifuged under regular gravity condition and enables bi-directional cross-flow during centrifugation. A small mesh filter plate may be placed on top of the layering insert.
Abstract:
A digital peak detecting circuit for receiving a pulse train of electrical signals having a frequency within a known frequency range and for converting the same into digital signals is shown. The digital peak detecting circuit includes an input circuit having a phase-locked loop for producing clock pulses at a frequency which is a preselected integer of the electrical signals frequency and for deriving therefrom an analog input signal. A pulse control circuit receives and counts a predetermined number of clock pulses and produces count enabling signals. A peak detecting circuit is provided which includes a comparator which has the analog input signal and a analog output signal voltage applied to the inputs thereof and which has an output coupled to the pulse control circuit. A digital counting circuit is responsive to count enabling signals by changing count direction and produces discrete digital output signals which are stored in a latch register at the time the digital counting circuit changes its count direction. A digital-to-analog converter produces the analog output signal voltage and it is applied to the comparator input for comparing the analog input signal with the analog output signal voltage and the comparator enables the digital counting circuit as long as the analog input signal is of a greater magnitude than the analog output signal voltage, and when this condition is reversed, the digital counting circuit is reversed in counting direction, and the binary value thereof is stored in the latch register.
Abstract:
An electrical measuring system for measuring selected parameters of electrical signals derived from magnetic recording and having a frequency within a known frequency range wherein the system includes an input stage having an automatic amplifier for selectively amplifying the electrical signals to a preselected amplitude level, a first circuit which includes a digital peak detecting circuit for producing digital signals representing peak amplitude and the amplitude of the electrical signals sampled at closely spaced intervals and wherein the digital peak detecting circuit includes circuitry for sampling the preselected amplitude level electrical signals at a frequency which is less than the frequency of the electrical signals, a second circuit which includes a first phase-locked loop circuit, a frequency dividing circuit and a second phase-locked loop circuit for producing an output signal representing the frequency of a remnant signal in the electrical signals which is applied to the digital peak detecting circuit for producing a digital signal representing the remnant signal magnitude, a third and fourth stage for producing direct current voltage signals representing the power magnitude of noise spectra and the DC content of a pulse train for deriving from the pulse widths of the electrical signals, respectively, and for applying the same to the digital peak detecting circuit to produce a digital representation thereof is shown. A method for processing electrical signals to produce digital representations of the amplitude, read-over-write ratio, signal-to-noise ratio and the average pulse widths thereof is shown.
Abstract:
Abnormal behavior of mammalian cells is detected in vitro by measuring the fluidity or an associated phenomenon of the lipid layer of the cell surface membrane. Abnormal behavior of cells, in particular if caused by malignant transformations, is associated with increase of fluidity of the liquid layer of the cell membrane, as compared with normal cells. The fluidity can be determined, e.g., by measuring the degree of fluorescence polarization of the radiation emitted from a suspension of cells labelled in the lipid layer with a fluorescent compound. 1,6-Diphenyl-1,3,5-hexatriene was found to be a suitable fluorescent probe.
Abstract:
Methods, systems and computer-readable code for generating a forecast of a life-threatening condition, for example sepsis, in a subject, for example an infant, are disclosed. According to some embodiments, the forecast is generated in accordance with measurement values for a plurality of different vital sign parameters. In exemplary embodiments, vital sign parameters from a plurality of physiological systems are used to generate the forecast of the life-threatening condition. In exemplary embodiments, at least one vital sign parameter is other than a cardiac parameter. Non-limiting exemplary vital sign parameters may include one or more of a heart rate parameter, a respiration rate parameter, a bradycardia parameter, a desaturation parameter, a temperature parameter (for example, body temperature) and a body mass parameter.
Abstract:
Methods, systems and computer-readable code for generating a forecast of a life-threatening condition, for example sepsis, in a subject, for example an infant, are disclosed. According to some embodiments, the forecast is generated in accordance with measurement values for a plurality of different vital sign parameters. In exemplary embodiments, vital sign parameters from a plurality of physiological systems are used to generate the forecast of the life-threatening condition. In exemplary embodiments, at least one vital sign parameter is other than a cardiac parameter. Non-limiting exemplary vital sign parameters may include one or more of a heart rate parameter, a respiration rate parameter, a bradycardia parameter, a desaturation parameter, a temperature parameter (for example, body temperature) and a body mass parameter.
Abstract:
A single-dosage liquid medication dispensing unit, especially useful for newborns, babies, and young children, comprising a flexible container containing said liquid medication therein and having a nipple-shaped portion with an orifice for allowing sucking by a newborn, baby, or young child, wherein said orifice is initially in an inactive state and is adapted for being activated by a user just prior to being given to a newborn, baby, or young child for sucking. A method for delivering a single-dosage of a liquid medication is also disclosed.
Abstract:
A disk certifier which analyzes a read signal generated from a disk of a hard disk drive. The read signal typically has a sinusoidal waveform with modulated peak amplitudes. The waveform is generally defined by the equation A.multidot.sin(wt).multidot.(1-m(t)), where the term m(t) is the amplitude modulation of the signal. The peak signal is provided to a phase lock loop circuit which generates a multiplier peak signal generally of the form sin(wt). The certifier includes a multiplier which multiplies the read signal by the multiplier read signal to provide a multiplied read signal described by the equation A/2.multidot.(1-cos 2(wt)).multidot.(1-m(t)). The multiplied read signal is filtered by a low pass filter which has a cut-off frequency Wc below w. The low pass filter provides a filtered multiplied read signal which is described by the equation A.multidot.(1-g(t)), wherein the term g(t) is the portion of m(t) with frequencies below Wc. The filtered multiplied read signal is then compared to a threshold value(s) to determine a pass/fail error condition of the read signal. The certifier also has a histogram circuit which detects, counts and stores the occurrence of each peak amplitude value of the read signal. The peak amplitude data can be processed to plot a histogram which shows how many times the read signal produced various peak amplitudes. The histogram can be used to determine the actual performance of the disk certifier.