Abstract: This invention relates to a broad bandwidth electromagnetic wave absorber comprising a sintered ferrite and a CuO--Fe.sub.2 O.sub.3 system. The CuO--Fe.sub.2 O.sub.3 system, a spinel ferrite, has its own magnetic property, which makes it possible to be used for an electromagnetic wave absorber. The CuO--Fe.sub.2 O.sub.3 system is preferentially located at the grain boundary in the matrix ferrite. This resulted in increase in the total loss, decrease in matching thickness and shift in the center frequency.

Abstract: A composition of high frequency dielectric ceramics having a high unloaded Q value (Qu) and a high dielectric constant in a high frequency range such as micro- and millimeter wavelengths is disclosed. The composition according to the present invention is composed of the materials, (1-x)[Ba(Mg.sub.1/3 Ta.sub.2/3)O.sub.3 ]+xBaWO.sub.4 +0.1xMnO.sub.2 (0.01.ltoreq.x.ltoreq.0.09).

Abstract: The present invention relates to over-the-wire PTCA balloon catheters (5), and more particularly, to a rapid exchange catheter with the guidewire lumen (50) at the distal tip. The present invention discloses a rapid exchange medical catheter having a wire guiding means external to the shaft (35) for slidably mounting over the guidewire (55), the wire guiding means being a short tubular member having a proximal end and a distal end extending proximally from the distal end of the shaft (35) and terminating before the distal end of the balloon therapy means.

Abstract: The present invention relates to novel substituted guanidine and amidine compounds, their preparation and their use in the kill and control of fungal organisms which infest plants.

Abstract: A method for preventing erroneous recording in a compact disc player is disclosed, to prevent erroneous recording and selecting erroneous data during reproduction, wherein the conventional compact disc player is improved in such a manner that a memory is provided so as to store the data temporarily and to delay the recording of the data as required, and errors are detected during the delayed period of time, thereby preventing such defective music from being recorded.

Abstract: A semiconductor device which includes a semiconductor integrated circuit chip provided with a plurality of chip bonding pads contiguous with the peripheral edge of the chip, and a plurality of leads directly bonded to respective ones of the chip bonding pads. The bonding pads are preferably formed within respective notches disposed in a marginal edge portion of the chip, with each of the notches having an open end formed in the peripheral edge of the chip. By locating the chip bonding pads contiguous with the peripheral edge of the chip, rather than a prescribed distance away from the peripheral edge of the chip, the bonding pads are directly accessible from the edge of the chip, thereby enabling the leads to be directly bonded to the bonding pads, and thus eliminating the need for bonding bumps or balls.

Abstract: Ferrites as an electromagnetic wave absorber have their unique attenuation ranges depending on their compositions. The possibility of controlling attenuation characteristics of ferrite absorber by forming laminates of ferrite is disclosed. This invention provides that the center frequency of laminated ferrites could be changed arbitrarily employing ferrite with different composition and thickness. The method consists of stacking at least two soft ferrite layers (Ni-Zn, Mn-Zn) with various thickness.

Abstract: A p type well is formed on an n type substrate and photodiode and VCCD regions are repeatedly at predetermined intervals in turns on the surface of the p type well.In an interline transfer image sensor, the p type well is formed on the n type substrate and the photodiode and VCCD region of predetermined intervals are repeatedly formed in turn on the surface of the p type well. The p.sup.+ type channel ion stop layer is formed at both edges of the VCCD region and the pinning voltage is applied to the p.sup.+ type channel stop layer. Accordingly, the variable potential of the potential contour of the VCCD region is increased and the storing capacity of the charge and the efficiency of the charge transfer are maximized side by side.

Abstract: Metal oxide group NTC theremistor material made from MnCO.sub.3 +NiO+CuO+Co.sub.3 O.sub.4 +FeO.sub.3 TiO.sub.2 group as a basic composition. The invention is characterized by metal oxide group thermistor material made from MnCO.sub.3 +NiO+ZnO+Co.sub.3 O.sub.4 +Fe.sub.2 O.sub.3 +TiO.sub.2 group or MnCO.sub.3 +NiO+CuO+ZnO+Fe.sub.2 O.sub.3 +TiO.sub.2 group as a basic composition having respectively composition amounts by weight for each ingredient described in the text. According to the invention, the sintering temperature of the material can be reduced relative to the conventional material, and therefore there is advantage that manufacturing expense of the thermistor can be reduced.

Abstract: A CCD image sensor having an N type photodetecting region, an N type VCCD region and an N type HCCD region, comprising a P type layer formed underneath and surrounding said N type VCCD region, an N type layer formed underneath and surrounding said P type layer, a P type well formed underneath and surrounding said N type layer, and an N type substrate formed under said P type well, said substrate being adapted and arranged for the application thereto of a shutter voltage. In accordance with the present invention, the CCD image sensor is capable of preventing an overflow drain caused by error charges or excess charges resulting from a smear. Therefore, the photoelectric efficiency can be increased in a wavelength of the red color type wherein the amount of light energy is small.

Abstract: An improved process for manufacturing a polycrystalline alumina fiber comprising dissolving aluminum alkoxide in alcohol, adding acetylacetone, hydrolyzing with water, and polymerizing to form a polymeric alumina sol and spinning the polymeric alumina sol by using a spinning apparatus.

Abstract: A microwave leakage shielding device for a microwave oven includes a seal plate integrally formed with a slit and having a bent surface disposed at a flange by coupling of the flange and the bent surface of the seal plate for obtaining a first shielding effect, a tuning post member having a certain period based on a TE mode wherein there exists no electric field in the direction of the wave direction for obtaining a second shielding effect, a choke seal disposed in the damping groove for obtaining a third shielding effect, and a capacitive seal formed by coupling of the bent surface of the door frame and the flange for obtaining a fourth shielding effect, whereby the microwave leakage shielding device exhibits an excellent shielding capability and is convenient in assembling with the microwave oven.

Abstract: This invention relates to catalyst supports, methods for making them, and to catalysts prepared therefrom. More particularly, it relates to binary oxidic catalyst support materials comprising titania and zirconia with high porosity and high surface area prepared by either a pH swing technique or a constant pH technique followed by calcination at a temperature below 450.degree. C., with such materials being impregnated with catalytically active metal components.

Abstract: This invention relates to catalyst supports, methods for making them, and to catalysts prepared therefrom. More particularly, it relates to binary oxidic catalyst support materials comprising titania and zirconia with high porosity and high surface area prepared by either a pH swing technique or a constant pH technique followed by calcination at a temperature below 450.degree. C., with such materials being impregnated with catalytically active metal components.

Abstract: In a process wherein diesel exhaust gas is passed through a filter to remove particulate therefrom before discharge and particulate deposited on the filter is combusted, the improvement which comprises combusting the particulate with a gas containing NO.sub.2, which may be catalytically generated in the exhaust system.

Abstract: An air supply device which may be used for emergencies such as an escape from a buring building comprises an air tank having a hose connected to a face mask and an activation element and a regulation element. The activation element consists of a spring biased valve which will automatically move to an opened position when a holding pin is released. The regulation element consists of a U-shaped valve having a first end for covering apertures leading to the hose and a second end in engagement with an expansion element. As air is removed from the tank during use of the device, the expansion element will expand due to a decrease in air pressure within the tank. As the expansion element enlarges, the U-shaped valve will move so as to expose additional apertures. A constant supply of air is therefore easily and automatically maintained.

Abstract: An SCR catalyst consisting essentially of iron sulfate or oxysulfur iron compound carried by a mixture of ceria and alumina on a support.

Abstract: An SCR catalyst consisting essentially of at least one oxysulfur compound of manganese, nickel or mixtures thereof, carried by a supported mixture of ceria and alumina. The catalyst is characterized by its high activity and by its stability even when used in the absence of sulfur oxides.

Abstract: An SCR catalyst consisting essentially of iron sulfate or oxysulfur iron compound carried by a mixture of ceria and alumina on a support.