Abstract: A transmit/receive module includes plural duplexers, a power amplifier, and a sending transmission line. The plural duplexers operate in bands different from each other and each includes a transmit filter and a receive filter. The power amplifier amplifies signals of pass bands of the plural transmit filters and outputs the amplified signals. The sending transmission line is connected to the plural transmit filters. The signals of the pass bands of the plural transmit filters output from the power amplifier are transmitted through the sending transmission line.

Abstract: Siloxane compounds are removed from the atmospheres by silica supporting an organic sulfonic acid compound. The silica with the organic sulfonic acid compound has a specific surface area down to 500 m2/g and up to 750 m2/g and a pore volume down to 0.8 m3/g and up to 1.2 m3/g, both measured by nitrogen gas adsorption method and has a pore diameter down to 4 nm and up to 8 nm, at the peak of differential pore volume measured by nitrogen gas adsorption method. The durability of gas sensing element against siloxanes is improved.

Abstract: A method for producing L-glutamic acid, comprising inoculating a microorganism having an ability to produce L-glutamic acid, in a liquid medium containing a carbon source and a nitrogen source, conducting continuous L-glutamic acid fermentation in which both a carbon source and a nutrient having an effect of promoting bacterial growth are fed so as to make the microorganism grow, and then collecting L-glutamic acid produced and accumulated in a culture broth.

Abstract: A vessel speed detecting device that incorporates an arrangement for providing a more accurate speed indication from a pressure transducer under the condition of abrupt vessel speed changes. The output signal from the pressure transducer is modified under these conditions to provide the more accurate speed indication signal. The abrupt vessel speed change is determined by comparing the output of the speed indicator with a previously memorized speed indication signal. The modified speed indication is obtained from a memory.

Abstract: A battery voltage condition indicator in which the battery voltage is periodically sampled and a warning indication is given if the battery voltage falls below a predetermined relatively high value for relatively short periods of time or a predetermined higher voltage value for longer periods of times. In addition, a warning signal is also given in the event an open circuit occurs.

Abstract: A watercraft speed sensor that drives a speed signal from water pressure generated by the movement of the watercraft through the water. Several embodiments of arrangements are disclosed for obtaining an ambient reference signal which is subtracted from the measured pressure signal in order to obtain a greater degree of accuracy for changes in atmospheric conditions.

Abstract: A vessel speed indicating device including a semiconductor pressure detector that detects dynamic pressure and outputs a signal indicative of this pressure. A speed indicator and calculator is incorporated which senses when the speed is below a speed at which high accuracy can be expected and outputs a warning signal in the event of that condition. Alternatively, when the device is operating in a range where the speed signal is accurate, actual speed is indicated.

Abstract: A number of embodiments of watercraft speed detecting devices embodying a dynamic semiconductor pressure sensor that has high accuracies at most speed ranges and another speed sensor that has a higher degree of accuracy than the semiconductor pressure sensor at a certain range and that speed is displayed at that certain range. The other speed sensor may be of a wide variety of types such as a magnetic current meter, a propeller type speed sensor, or a tachometer that is driven by the engine and associated circuitry for calculating watercraft speed from engine speed.