The present invention provides a polyvinyl alcohol powder which comprises a pore having an average diameter of 0.1 to 10 .mu.m in the range of 0.05 to 0.4 cc/g. Since the PVA powder of the present invention has an excellent solubility in water, an aqueous solution thereof can easily be prepared industrially. Since the PVA powder of the present invention has a low content of an organic volatile com...

The invention relates to a laparoscopic instrument for looping hollow vessels and for applying endoligatures in the abdominal cavity. The instrument has an instrument tube (4), which can be introduced through a trocar cannula into the abdominal cavity. Within the instrument tube (4) is provided a spiral spring element (8), which is kept there in the unrolled state and can be slid out of the front ...

A DS-CDMA transmission method capable of improving the accuracy of channel estimation using pilot symbols by eliminating cross-correlation between pilot symbols inserted into code channels in CDMA multiplexing carrying out fast signal transmission. In each frame assembler, the pilot symbols, which are used for channel estimation for coherent detection, are inserted into coded information data on c...

A process for monoalkylating diphenylamine using a clay catalyst is disclosed which results in a reaction product having substantial amounts of desirable monoalkylated diphenylamine and minimal amounts of less desirable disubstituted diphenylamine and unsubstituted diphenylamine. The disclosed process uses clay catalysts which favor monoalkylation over dialkylation and specific conditions such as ...

This invention shows a method for improving water-proofing property of water-setting inorganic compositions such as plaster. The modifier is prepared by emulsifying (A) a copolymer of a vinyl monomer and unsaturated dicaboxylic acid (or anhydride) having an acid number of 200 - 400 mg KOH/g (SMA 2000 or 3000) and (B) organopolysiloxane or its derivatives into water by use of alkali compounds, wher...

A DS-CDMA transmission method capable of improving the accuracy of channel estimation using pilot symbols by eliminating cross-correlation between pilot symbols inserted into code channels in CDMA multiplexing carrying out fast signal transmission. In each frame assembler, the pilot symbols, which are used for channel estimation for coherent detection, are inserted into coded information data on c...

Absorbent articles such as disposable diapers, incontinent briefs, diaper holders, training pants, and the like, that provide dynamic fit about the wearer by the use of elasticized hip panels. Such absorbent articles comprise a liquid pervious topsheet; a liquid impervious backsheet; an absorbent core disposed between the topsheet and the backsheet; elasticized side panels positioned in the side p...

An absorbent article having a liquid permeable topsheet, a liquid impermeable backsheet and a liquid absorbent pad for absorbing a liquid exuded from the human body positioned there between, and having an elasticized side flap and an extended wing along each side edge of the absorbent article. The side flap has a loop member formed from either the topsheet or the backsheet, or an optional secondar...

The present invention provides a disposable diaper having a fully elasticized waist opening with an improved fit of the diaper on the waist. A disposable pull-on diaper having a waist opening (13) and leg openings (14), includes an absorbent chassis (20) divided into halves by a longitudinal centerline, and elastic panels (30) which have a waist opening edge (16) and an opposing leg opening edge (...

A four-cycle engine mounted on a small planing watercraft is disclosed, in which an oil tank is integrally formed with the side walls of a cylinder head, a cylinder block, a crank case, or an oil pan of the engine body.An oil receptacle is arranged on the bottom of the engine body and communicates with an internal space of the crank case. The engine body includes an oil passage for transporting th...

A digital receive filter comprises first and second filter parts with a down sampler between them. Each filter part is formed by a plurality of cascaded filter s tages each comprising a second order finite impulse response digital filter having symm etrical coefficients which in most cases are integer powers of two, and in other cas es are zero or a sum of integer powers of two. The filter stages...

A flexible communications systems provides users with additional communication channels without requiring additional transmitters or receivers by using variable rate Walsh coding. Additionally, the assignment of these additional communication channels is easily managed at the base station by monitoring data backlog and receiver error rates.

This is a catheter section having a number of radially placed holes through the catheter section wall and a catheter assembly including that section. That c atheter assembly may be used in accessing and treating a tissue target within the bo dy, typically one which is accessible through the vascular system. Central to th e catheter section is the presence of a braided metallic reinforcing member, ...

Bed base comprising a core (1) consisting of a large number of spring units (2), each of which comprises a spring coil (3) enveloped by a textile cover (4), which textile covers are connected to each other and thus hold the springs in an upright position. A layer (6) of a stiff elastic material is arranged to support the spring core (1) in such a manner that when a spring (3) is depressed, its end...

Bed base comprising a core (1) consisting of a large number of spring units (2), each of which comprises a spring coil (3) enveloped by a textile cover (4), which textile covers are connected to each other and thus hold the springs in an upright position. A layer (6) of a stiff elastic material is arranged to support the spring core (1) in such a manner that when a spring (3) is depressed, its end...

Patin du type à roulettes ou à roues en ligne comportant une chaussure (2) apte à être associée à une platine supérieure (4) d'un châssis (5) sur lequel sont disposées les roues de patinage (6) et disposant d'un bloc de freinage (7) solidaire d'une partie arrière du châssis (5) et susceptible d'entrer en contact par frottement avec le sol par soulèvement avant du patin, caractérisé en ce que le ch...

A medical device having a surface graft matrix comprising carboxyl-functional groups located on the device, the surface graft matrix comprising an outer portion; and one or more biomolecules covalently coupled to the surface graft matrix, wherein a majority of the biomolecules are located in the outer portion of the surface graft matrix. The surface graft matrix can also be loaded with a pharmaceu...

A method and apparatus for friction stir welding that produces a weld of significantly reduced surface roughness at significantly higher welding rates, in materials that are difficult to weld, such as non-extrudable aluminum alloys. The method includes cooling the stir welding tool during the welding process, thereby reducing the tendency of softened metal to adhere to the rotating pin and shoulde...

An improvement to a friction stir welding tool having a rotating member, the improvement including an attachable cutting tool (30) having one or more radial cutting edges (32). A first embodiment of a cutting tool including one or more cutting inserts (42), each cutting insert having a lower end cutting edge; a like number of insert-engaging grooves (44); a collar (46) sized to closely engage arou...

An ion source embodying the present invention is for use in an ion implanter. The ion source comprises a gas confinement chamber having conductive chamber walls that bound a gas ionization zone. The gas confinement chamber includes an exit opening to allow ions to exit the chamber. A base positions the gas confinement chamber relative to structure for forming an ion beam from ions exiting the gas ...