A filled and polymerizable dental material is described which contains a sol of SiO2 particles in a liquid, organic dispersion agent, the SiO2 particles being organically surface modified, having an average size of 10 to 100 nm and being non-agglomerated.

A solid-state laser apparatus is composed of a semiconductor laser device 17, a laser medium 13 for generating oscillated light, a non-linear optical device 12 for converting the oscillated light to non-linear light, a laser holder 17a and a base plate 19 for holding the semiconductor laser device 17, and a crystal holder 3 for holding the laser medium 13 and the non-linear optical device 12. The ...

A method of manufacturing a can body by bonding a printed film sheet having an overcoating layer on its surface to the trunk of the can body. A continuous film (21) of a synthetic resin having an overcoating layer (22) formed on its one face and a printed layer (23) and an adhesive layer (24) formed on its other face is cut into a plurality of film sheets of a size for each can to have a slightly ...

A method of wireless communication among a plurality of stations in which each station communicates with all of the other stations over a cycle time divided into a plurality of communication sectors during each of which one of the stations transmits, including the step of changing the frequency of the transmission in accordance with a predetermined protocol, only at the end of a sector in which on...

The converter for converting an interlace signal into a progressive scan signal comprises: a low pass filter for vertically filtering an interlace signal at a present field; a high pass filter for vertically filtering an interlace signal at a previous field of the present field; and addition means for generating an interpolation line signal at a present field by summing an output of the high pass ...

Disclosed is a high strength porous film of polypropylene which comprises predominantly a polypropylene resin and possesses the following physical properties: (1) a tensile strength of at least 35 MPa in machine direction (MD) and transverse direction (TD); (2) a porosity of not more than 80%; and (3) a moisture permeability of at least 20 g/m2 day. The porous film may be produced by stretching or...

A full ship has a bow configuration which reduces resistance by waves not only for waves of short wavelengths but also for waves of long wavelengths. The bow (2) has a bow stem (2a) inclined forward such that the angle between the stem and the load water line is 10-50 DEG and the section of the stem is of downward wedge-shaped at a divergence angle falling in the range of 30-120 DEG .

A vibration gyroscope which is capable of accurately detecting a rotational angular velocity regardless of environmental changes or changes in vibrator characteristics i ncludes a vibrator formed of a vibration element, and first and second piezoelectric elements for dete ction and a third piezoelectric element for driving. Output currents of the first and second p iezoelectric elements are conver...

The catheter comprises a catheter tube 1 formed of two superposed tubular layers of materials 2 and 3 which differ from one another. A tubular mediator layer means 4 is arranged between layers 2 and 3 to provide an adhesive anchorage for layers 2 and 3. The tubular mediator layer means is made of two superposed layers 27 and 28.

The present invention provides a silanized pyrogenically- produced silica with the following physico-chemical properties: Specific surface area m2/g 80 - 400 Primary particle size nm 7 - 40 Tamped density g/l 50 - 300 pH value 3 - 10 Carbon content % 0.1 - 15 DBP number % <...

A vacuum cleaner conversion arrangement is disclosed which, particularly, may be advantageously applied to a dirt cup cleaner. In this application, the conversion hose confluently communicates with the dirt cup when the cleaner is in converted condition so that suction air flows from the dirt cup to the motor-fan system of the vacuum cleaner in either of its floor or hose modes of operation. The c...

A fuel bundle design for a heavy water moderated and cooled reactor and in particular, to a fuel bundle that provides control of the reactivity upon coolant voiding in a reactor such as a CANDU type nuclear reactor. The geometry of the fuel bundle reduces the coolant mean chord length. A centrally disposed neutron scattering material is surrounded by an annular region in which fuel pins are arrang...

The battery pack which can be attached independent of orientation houses rechargeable batteries within its case and has positive and negative (+ -) charge-discharge terminals at one end of the case. The charge-discharge terminals are arranged to connect to electrical apparatus without regard to the orientation of the front or back of the case. The + - charge-discharge terminals are sheet metal ben...

The present application discloses a method of facilitating the inspection of hydroelectric runner blades mounted within a water passage comprising the step lowering a portable inspection platform down into the water passage to a position adjacent to and below the blades of the runner. The platform is configured to hold at least one person and to pass between the blades of the runner. The present a...

The conveyor plate (1) has a coupling component provided for connecting the conveyor to a drive chain (6). Adjacent plates partly overlap one another. The plate on its upper side has at least one area (8), the upper limiting surface of which is at a different height level than the adjoining parts of the plate.

In a sync detector, a baseband signal is segmented into a plurality of successive bit sequences so that the bits of each sequence are shifted by one bit position with respect to the bits of adjacent sequences. On a bit-by-bit basis, mismatches are detected between each input bit sequence and a predetermined bit sequence and the detected mismatches are counted to produce a mismatch count. A first c...

A vehicle tracking method and system using the cellular network infrastructure is disclosed. A cellular transceiver which is installed in a vehicle that requires tracking, operates on a continuous standby mode to remain constantly accessible to the cellular security provider. The cellular transceiver is turned to an active mode when tracking of the vehicle is initiated. The general location of the...