Abstract: An apparatus for measuring nuclear reactor power distribution comprises a Fourier coefficient calculation means and a transformation means, whereby Fourier coefficients of neutron detector outputs are transformed into Fourier coefficients of integrated values of the reactor power on each interval, and hence conditions required of data for initial calibration are made less severe and the initial calibration is enabled to be performed much easier. The apparatus further comprises an abnormal data deletion means, whereby detection and deletion of abnormal data are made easy so that the apparatus performs a stable operation with high accuracy.

Abstract: A radiation measuring apparatus capable of producing pulses whose number depends on measured radiation energy and in which the number of pulse height discriminators outputting the pulses is determined by pulse heights or the pulses. The invention makes it possible to compensate sensitivity characteristics of the apparatus against the radiation energy by weighing the number of pulses according to the radiation energy.

Abstract: A logarithmic amplifier which obtains accurate logarithmic output voltage and expands maximum current value and which realizes accurate logarithmic conversion by eliminating logarithmic conversion error voltage resulting from internal resistance of logarithmic conversion element using a voltage appearing when a forward current of logarithmic conversion element is applied to a resistor.

Abstract: An apochromat type objective lenses, which is applied to an astronomical telescope; a telephoto lens for cameras or the like, comprising a semiapochromatic first lens system synthesized lens composed of two lenses in one group consisting of a convex lens and a concave lens, and an achromatic second lens system synthesized lens composed of two lenses in one group consisting of a concave lens and a convex lens, which is arranged in a spaced apart relation behind the semiapochromatic first lens system; the first and second lens systems being fulfilled with the condition below: ##EQU1## where, f, f: the focal length of the first and second lens systems,K, K: the proportion of the residual secondary chromatic aberration of the first and second lens systems, andL: the mutual spacing between respective lens systems.

Abstract: Pharmaceutical preparation containing an acid labile compound together with an alkaline reacting compound or an alkaline salt of an acid labile compound optionally together with an alkaline compound as the core material, one or more subcoating layers comprising inert reacting compounds which are soluble or rapidly disintegrating in water, or polymeric, water soluble filmforming compounds, optionally containing pH-buffering alkaline compounds and an enteric coating as well as a process for the preparation thereof and the use in the treatment of gastrointestinal diseases.

Abstract: A detecting instrument for detecting time difference between input times of two signals through the use of correlation function is disclosed. The instrument includes a digital circuit for repetitive computing of the correlation function between the two input signals and an analog circuit for detecting the phase of the fundamental frequency component of the repeated correlation function provided by the digital circuit.

Abstract: A signal detection apparatus wherein pulses of the reverse polarity to that of the signal pulse to be detected are detected from an input pulse signal, and thereafter the signal outputting path is cut off for a fixed period, so that noise pulses which have oscillating waveforms in both positive and negative polarites are segregated from the signal pulses which can be provided with a unipolarity, by making use of the difference in polarity, and thereby, the noise pulses are eliminated regardless of their pulse heights. Further, the signal input to the cut-off circuit is delayed for a fixed period of time so that the first peak of the noise pulses may be eliminated even if it is of the same polarity as that of the signal pulse.

Abstract: Pharmaceutical preparation containing omeprazole together with an alkaline reacting compound or an alkaline salt of omeprazole optionally together with an alkaline compound as the core material, one or more subcoating layers comprising inert reacting compounds which are soluble or rapidly disintegrating in water, or polymeric, water soluble filmforming compounds, optionally containing pH-buffering alkaline compounds and an enteric coating as well as a process for the preparation thereof and the use in the treatment of gastrointestinal diseases.

Abstract: A phase shifter according to this invention comprises circuit groups on a phase advance side and on a phase retardation side in each of which N phase shifting circuits of constant amplitude are connected in cascade, and in which the time constants of the successive phase shifting circuits are set at a geometrical progression of a fixed ratio .alpha., while the time constants of the phase shifting circuits on the phase retardation side are made .beta. times greater than those of the corresponding phase shifting circuits on the phase advance side. Thus, any desired phase difference can be attained according to the value .alpha., while a desired phase difference can be attained according to the value .beta., and the limits of a frequency band width are eliminated by increasing the number of stages N of the cascade connection of each circuit group.

Abstract: A nuclear reactor output power meter for measuring the output of a nuclear reactor from the concentration signal of radioisotope .sup.16 N in a primary coolant loop, having a transient response correction circuit. This correction circuit includes an approximated normal distribution response filter. This filter has a group delay time substantially corresponding to a single circulation time necessary for the primary coolant loop of the nuclear reactor. This filter also has a rise time in the step response substantially corresponding to a spread in the rise time of the .sup.16 N concentration signal due to agitation occurring during the single circulation time.

Abstract: This squaring circuit has an input connected to the collector of a PNP transistor which has its emitter connected to the emitter of an NPN transistor. This NPN transistor has the collecotor maintained at a predetermined voltage and the base connected to the base of another NPN transistor. The latter NPN transistor has the collector connected to both a source of constant current and its base, and has the emitter maintained at a predetermined voltage and connected to the emitter of another PNP transistor which has its collector connected to an output of the circuit and its base connected to the base and the collector of the first mentioned PNP transistor which has its collector connected to the input. Both PNP transistors have approximately the same characteristics as both NPN transistors.

Abstract: A fluorescent X-ray sulfur analyzer is disclosed and includes a radiation source for irradiating a sample with X-rays or .gamma.-rays, a radiation detector for detecting the radiation generated from the sample irradiated by the X-rays or .gamma.-rays and a first analyzer for selecting only fluorescent X-ray pulses from the output of the detector. The analyzer further includes a first pulse rate measuring device for measuring the pulse rate of the pulses selected by the first analyzer, a second analyzer for selecting only pulses of compton scattered rays from the output of the detector and a second pulse rate measuring device for measuring the pulse rate of the pulses selected by the second analyzer. An operational circuit is provided for operating the outputs of the first and second pulse rate measuring devices and is calibrated to compensate for the error caused by the variation of the carbon-hydrogen ratio to realize an accurate weight content of the sulfur in the sample.

Abstract: A radiometric analyzer for measuring the characteristic values of a sample by radiation includes a plurality of radiation measuring subsystems having different ratios of sensitivities to the elements of the sample and linearizing circuits having inverse function characteristics of calibration functions (calibration function while varying the density in a constant content ratio of the sample) which correspond to the radiation measuring subsystems and a weighing adder for operating a desirable linear combination of the outputs of the linearizing circuits and operators for operating between two or more different linear combinations.

Abstract: A radiometric analyzer for measuring characteristics of a material by radiation comprises a plurality of systems in which each consists of a radiation source and a radiation detector which are the same in number as the number of elements of the molecule of the material and a linear calibration circuit having inverse response characteristics (calibration curve) of the respective systems of detectors, whereby the measurement is carried out by a four fundamental rules operation of the mutual outputs of said detector system obtained through said linear calibration circuit. One typical embodiment is a radiometric analyzer for hydrocarbons which measures the density of heavy oil, the sulfur content and the calorific value by three detector systems which include a .gamma.-ray source (E.sub..gamma. > 50 KeV), a soft X-ray source (Ex .apprxeq. 20 Kev), and a neutron ray source.

Abstract: The disclosed meter comprises a pulse shaper circuit for forming each input pulse into a voltage pulse having a predetermined pulsewidth, a level control circuit connected to the pulse shaper circuit to produce a voltage including a dc component providing a measure of the frequency of the input pulses, and a low-pass filter dc coupled to the level control circuit. The filter consists of a series resistor, a parallel capacitor and a series feedback type operational amplifier to extract the dc component from the voltage from the level control circuit.