Abstract: Various embodiments provide a position indicator including a retaining mechanism that can fix a core body securely and which can electrically transmit a signal from an internal circuit to the core body reliably. The position indicator includes a core body having conductivity, a conductive elastic member including a holding portion for holding and fixing the core body, a core body holder having conductivity and fitted with the conductive elastic member to retain the core body fitted in the conductive elastic member, a signal transmitter, and an electric connecting member for establishing an electric connection between the core body holder and the signal transmitter. The core body is detachably fitted into the conductive elastic member. A signal from the signal transmitter is transmitted from the core body through the electric connecting member, the core body holder, and the conductive elastic member.

Abstract: A position pointer has a tubular housing having a first opening portion at one longitudinal end. A rod-shaped core body is arranged in the housing with a first end of the core body opposed to the first opening portion. A writing pressure detection circuit is arranged in the housing, which, in operation, detects a writing pressure based on movement of the core body. A signal transmitter is arranged in the housing, which, in operation, transmits a signal. The position pointer includes an elastic block of material sized and shaped to form a seal with an inner surface of the housing and positioned near the first end of the core body.

Abstract: Various embodiments provide a position indicator including a retaining mechanism that can fix a core body securely and which can electrically transmit a signal from an internal circuit to the core body reliably. The position indicator includes a core body having conductivity, a conductive elastic member including a holding portion for holding and fixing the core body, a core body holder having conductivity and fitted with the conductive elastic member to retain the core body fitted in the conductive elastic member, a signal transmitter, and an electric connecting member for establishing an electric connection between the core body holder and the signal transmitter. The core body is detachably fitted into the conductive elastic member. A signal from the signal transmitter is transmitted from the core body through the electric connecting member, the core body holder, and the conductive elastic member.

Abstract: A position pointer has a tubular housing having a first opening portion at one longitudinal end. A rod-shaped core body is arranged in the housing with a first end of the core body opposed to the first opening portion. A writing pressure detection circuit is arranged in the housing, which, in operation, detects a writing pressure based on movement of the core body. A signal transmitter is arranged in the housing, which, in operation, transmits a signal. The position pointer includes an elastic block of material sized and shaped to form a seal with an inner surface of the housing and positioned near the first end of the core body.

Abstract: A position indicator comprises a case having a housing portion and an opening; a rod with a substantially bar-like body and an end and housed in the housing portion such that the end of the rod protrudes outside the case through the opening; and a sealing member attached to the opening and having an aperture into which the rod is inserted such that a gap between the aperture and the rod is sealed. A position detecting system comprises a position detecting device having a plurality of superimposed coils, a processing unit; and a position indicator. When the indicator approaches the position detecting device, a signal is induced by one of the coils, and the processing unit determines a position of the indicator based on the signal and a coordinate of the coil that induced the signal.

Abstract: To provide an inexpensive wastewater treatment method which facilitates downsizing of tanks and requires less withdrawal of an excessive sludge, the use is made of an aeration tank 1 in which wastewater is contacted with a particulate carrier under an aerobic condition, and a total oxidization tank 3 in which the volume of a sludge generated in the aeration tank 1 is reduced under an aerobic condition, a coefficient of self-oxidization of the sludge flowing into the total oxidization tank 3 is set to 0.05 (per day), and the method includes a step of adding a coagulant to the total oxidization tank 3 for the purpose of improving the solid-liquid separating characteristic of the sludge within the total oxidization tank.

Abstract: To provide an inexpensive wastewater treatment method which facilitates downsizing of tanks and requires less withdrawal of an excessive sludge, the use is made of an aeration tank 1 in which wastewater is contacted with a particulate carrier under an aerobic condition, and a total oxidization tank 3 in which the volume of a sludge generated in the aeration tank 1 is reduced under an aerobic condition, a coefficient of self-oxidization of the sludge flowing into the total oxidization tank 3 is set to 0.05 (per day), and the method includes a step of adding a coagulant to the total oxidization tank 3 for the purpose of improving the solid-liquid separating characteristic of the sludge within the total oxidization tank.

Abstract: A position indicator comprises a case having a housing portion and an opening; a rod with a substantially bar-like body and an end and housed in the housing portion such that the end of the rod protrudes outside the case through the opening; and a sealing member attached to the opening and having an aperture into which the rod is inserted such that a gap between the aperture and the rod is sealed. A position detecting system comprises a position detecting device having a plurality of superimposed coils, a processing unit; and a position indicator. When the indicator approaches the position detecting device, a signal is induced by one of the coils, and the processing unit determines a position of the indicator based on the signal and a coordinate of the coil that induced the signal.

Abstract: A method of wastewater treatment that reduced equipment cost and running cost and realizes high efficiency implementation and further tank miniaturization, and that reduces excess sludge withdrawal. There is provided a method of wastewater treatment with excess sludge withdrawal reduced, characterized in that there are installed an aeration tank wherein wastewater is brought into contact with carrier particles under aerobic conditions, a total oxidization tank and a sedimentation tank, and that operation is made while maintaining the BOD sludge load in the total oxidization tank at 0.08 kg-BOD/Kg-MLSS*day or smaller, and that a coagulant is charged in the complete oxidization tank in order to improve the setting in the sedimentation tank.

Abstract: A method of wastewater treatment that reduced equipment cost and running cost and realizes high efficiency implementation and further tank miniaturization, and that reduces excess sludge withdrawal. There is provided a method of wastewater treatment with excess sludge withdrawal reduced, characterized in that there are installed an aeration tank wherein wastewater is brought into contact with carrier particles under aerobic conditions, a total oxidization tank and a sedimentation tank, and that operation is made while maintaining the BOD sludge load in the total oxidization tank at 0.08 kg-BOD/Kg-MLSS*day or smaller, and that a coagulant is charged in the complete oxidization tank in order to improve the setting in the sedimentation tank.

Abstract: A method of treatment of waste water includes a sludge flocculating step of obtaining a supernatant liquid by flocculating within a flocculation tank 4 the sludge having been treated within an activated sludge aeration tank 3 where the waste water and an activated sludge are brought into contact with each other in an aerobic condition, a sludge concentration retaining step of retaining a concentration of a sludge within the activated sludge aeration tank 3 at a predetermined value by returning portion of a sludge within the flocculation tank 4 to the activated sludge aeration tank 3, an excessive sludge complete oxidation step of maintaining an excessive sludge, which is the sludge supplied from the flocculation tank 4, but exclusive of that portion of the sludge returned from the flocculation tank 4, in a complete oxidation state in which a speed of propagation of the sludge and a speed of self-oxidation of the sludge within the complete oxidation tank 5 are held in equilibrium with each other; and an excess

Abstract: Provided are an apparatus and a method for waste water treatment not generating excessive sludge, for which down-sized tanks are usable. The apparatus comprises an aeration tank where waste water to be treated is kept in contact with carrier particles in an aerobic condition, and a complete oxidation tank. In this, the liquid in the complete oxidation tank is filtered through a separation membrane and the resulting filtrate is discharged out of the system. The s-BOD sludge load to the complete oxidation tank is preferably at most 0.1 kg-BOD/kg-MLSS·day.

Abstract: In a crystallized glass article consisting of crystallized glass masses fusion bonded together and having a principal surface, said principal surface having a surface pattern determined by said masses in a surface layer including said principal surface, said small crystallized glass masses in said surface layer are mainly of flaky crystallized glass pieces, each being a relatively large flattened piece, said flaky pieces overlapping one another at random to make said principal surface rough, said crystallized glass masses in another layer adjacent to and fused to said surface layer being considerably smaller than said flaky pieces. The article is produced by preparing flaky pieces and the smaller masses both of a SiO.sub.2 --Al.sub.2 O.sub.

Abstract: A crystallized glass article with a colored surface pattern, which comprises a crystallized glass substrate having a surface and small glass masses having a color different from the substrate and dispersed and fusion-bonded in the surface to form the colored surface pattern. The crystallized glass article is produced by depositing and dispersing small glass masses with a color on a surface of a substrate of a crystallizable glass with a different color which can precipitate crystals therein with softening and deforming by heat-treating at a heat treating temperature higher than the softening point of the crystallizable glass, then heating the substrate together with the small glass masses at the heat treating temperature.