Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Tomoyasu Takaoka

Yasuhiro Hashimoto

Daisuke Ino

Atsushi Nakamura

Shigeru Furumiya

Rie Kojima

Naoyasu Miyagawa

Takashi Nishihara

Masahiro Iseki

Tetsuya Akiyama

Hirofumi Fujita

Yoshitaka Sakaue

Yuko Maruo

A method for controlling a liquid treatment apparatus of the present disclosure includes: (i) providing the liquid treatment apparatus; (ii) treating a polluted liquid in a photocatalytic reaction tank by a photocatalytic reaction to produce a treated liquid; (iii) introducing a liquid mixture into a separation tank from the photocatalytic reaction tank through a feed passage by a circulation pump; (iv) introducing a filtrate to an outside of the separation tank through an extraction passage while filtering the liquid mixture introduced into the separation tank by a filtration membrane, and feeding the liquid mixture to the photocatalytic reaction tank through an overflow passage; and (v) making a flow rate of the liquid mixture measured by a liquid mixture flow meter higher than a flow rate of the filtrate measured by a filtrate flow meter by controlling the circulation pump by a controller.

Liquid treatment method and apparatus

A water treatment method includes: calculating a total amount of ions contained in a total amount of an aqueous solution introduced into a first tank; when the calculated total amount of ions is greater than a first threshold value, introducing part of slurry in the first tank into a second tank; introducing, with an introducing unit, one of a marker molecule and a stain into the second tank; irradiating, from a second light source, the second tank with visible light; detecting, with a detector, first intensity of the visible light having transmitted through the second tank; and outputting, when the activity of photocatalytic particles calculated based on the first intensity is equal to or smaller than a second threshold value, information prompting replacement of the photocatalytic particles, an instruction of recovering the activity of the photocatalytic particles, or information indicative of deterioration of the photocatalytic particles.

Water treatment method and water treatment apparatus

A water treatment method includes: introducing an aqueous solution containing impurities into a first tank; irradiating, from a light source, photocatalytic particles with ultraviolet light, to turn the aqueous solution introduced into the first tank into primary post-treatment water with which the impurities have been treated; reducing pressure in a first chamber by a filtering pump to filter the primary post-treatment water with a filtering membrane, the filtering separating the primary post-treatment water into the photocatalytic particles stopped at the filtering membrane and secondary post-treatment water that passes through the filtering membrane and does not contain the photocatalytic particles; measuring concentration of photocatalytic particles in the first tank; measuring the difference in pressure between the first chamber and the second chamber; and when the concentration of the photocatalytic particles is equal to or smaller than the first threshold value and the difference in pressure between the first chamber and the second chamber is greater than the second threshold value, supplying air to the filtering membrane by operating a compressor.

Water treatment method, water treatment apparatus, and non-transitory computer-readable recording medium storing program

When the power of the write pulse is taken as the peak power and the power of the bottom pulse is taken as the bottom power, the power setting device () sets the power of each pulse in the recording pulse train such that the peak power PwN of the Nth information layer which is closest to the light entry surface of the optical recording medium (), the bottom power PbN of the Nth information layer, the peak power PwM of the Mth information layer (where M is an integer such that N&#x3e;M&#x2267;1), and the bottom power PbM of the Mth information layer satisfy the following formula:

Optical information recording device, optical information recording method and optical information recording medium

A recording wavelength generator selects control parameters of a recording pulse sequence, based on combinations of mark length, a first space length of a first space immediately before the mark, and a second space length of a second space immediately after the mark. A laser drive circuit records the marks by the recording pulse sequence. The first and second space lengths are classified into m and n types, respectively. An absolute value of a difference between two predetermined control parameters from among (m&#xd7;n) control parameters selected during recording on a second information layer located on an incidence side of the laser beam with respect to a predetermined first information layer from among N information layers is equal to or greater than an absolute value of a difference between two predetermined control parameters from among the (m&#xd7;n) control parameters selected during recording on the first information layer.

Optical information recording method, optical information recording device, optical information reproduction method, optical information reproduction device, and optical information recording medium

In an information recording medium that has an information layer which includes a recording layer capable of undergoing phase transition, the recording layer is formed from a material that contains Sb and S, and has composition represented by the formula (1): SbS(atomic %) where suffix x represents the proportion in atomic % that satisfies a relationship of 50&#x2266;x&#x2266;98.

Information recording medium, process for producing the information recording medium, sputtering target and film forming apparatus

An information recording medium, comprising N number (N is an integer fulfilling N&#x2267;3) of information layers on which information is recordable, and allowing information to be recorded on each of the information layers and allowing information recorded on each of the information layers to be reproduced by being irradiated with laser light. The N number of information layers include an N'th information layer, an (N&#x2212;1)th information layer, an (N&#x2212;2)th information layer, . . . a second information layer and a first information layer sequentially located from a laser light incidence side. A reflectance of the N'th information layer is R, and a reflectance of an M'th information layer (M refers to every integer fulfilling N&#x3e;M&#x2267;1) is R. The laser light used to irradiate the N'th information layer for reproducing information recorded on the N'th information layer has an upper limit reproduction power Pr, and the laser light used to irradiate the M'th information layer for reproducing information recorded on the M'th information layer has an upper limit reproduction power Pr. The following expressions (1) and (2) are concurrently fulfilled:R&#x3e;R&#x2003;&#x2003;(1)Pr&#x3c;Pr&#x2003;&#x2003;(2).

Information recording medium, recording apparatus, reproducing apparatus and reproducing method

An information recording medium of the present invention includes N information layers on a substrate (), where N is an integer of 2 or more. Information is recorded/reproduced by irradiating each of the information layers () with a laser beam (). When the N information layers are referred to as a first information layer to an N-th information layer sequentially from the opposite side to a laser beam incident side, the L-th information layer included in the N information layers includes at least a recording layer () capable of undergoing a phase change through laser beam irradiation, a reflective layer (), and a transmittance adjusting layer () in this order from the laser beam incident side, where L is an integer satisfying 2&#x2266;L&#x2266;N. The transmittance adjusting layer () contains Nb, oxygen (O), and at least one element M selected from Ti, Zr, Hf, Y, Cr, Zn, Ga, Co, Bi, In, Ta, and Ce. In the transmittance adjusting layer (), the content of Nb is at least 2.9 atom %.

Growing community of inventors

Osaka, Japan

Tomoyasu Takaoka