Abstract: It is intended to quantitatively evaluate deterioration in brain function associated with a disease such as dementia, with a high degree of accuracy by a simplified method using signals acquired from a few sensors arranged on the scalp.

Abstract: A laser processing system is equipped with a processing laser beam irradiation device configured to irradiate a processing object with processing laser beam and perform ablation processing. The laser processing system is configured to obtain an ablation image of a processed portion of the processing object based on scattered light from the processed portion during processing of the processing object with the processing laser beam and to estimate an ablation volume by applying a learning result obtained by deep learning of a relationship between the ablation image and the ablation volume to the obtained ablation image.

Abstract: A solid-state laser system may include: a solid-state laser unit configured to output first pulsed laser light with a first wavelength and second pulsed laser light with a second wavelength; a first solid-state amplifier configured to receive the first pulsed laser light, and output third pulsed laser light with the first wavelength; a wavelength converter configured to receive the third pulsed laser light, and output harmonic light with a third wavelength; a second solid-state amplifier configured to receive the second pulsed laser light, and output fourth pulsed laser light with the second wavelength; a Raman laser unit configured to receive the fourth pulsed laser light, and output Stokes light with a fourth wavelength; and a wavelength conversion system configured to receive the harmonic light and the Stokes light, and output fifth pulsed laser light with a fifth wavelength converted in wavelength from the third wavelength and the fourth wavelength.

Abstract: A solid-state laser system may include: a solid-state laser unit configured to output first pulsed laser light with a first wavelength and second pulsed laser light with a second wavelength; a first solid-state amplifier configured to receive the first pulsed laser light, and output third pulsed laser light with the first wavelength; a wavelength converter configured to receive the third pulsed laser light, and output harmonic light with a third wavelength; a second solid-state amplifier configured to receive the second pulsed laser light, and output fourth pulsed laser light with the second wavelength; a Raman laser unit configured to receive the fourth pulsed laser light, and output Stokes light with a fourth wavelength; and a wavelength conversion system configured to receive the harmonic light and the Stokes light, and output fifth pulsed laser light with a fifth wavelength converted in wavelength from the third wavelength and the fourth wavelength.

Abstract: A spheroidal mirror reflectivity measuring apparatus for extreme ultraviolet light may include an extreme ultraviolet light source, an optical system, and a first photosensor. The extreme ultraviolet light source may be configured to output extreme ultraviolet light to a spheroidal mirror that includes a spheroidal reflection surface. The optical system may be configured to allow the extreme ultraviolet light to travel to the spheroidal reflection surface via a first focal position of the spheroidal mirror. The first photosensor may be provided at a second focal position of the spheroidal mirror, and may be configured to detect the extreme ultraviolet light that has passed through the first focal position and then has been reflected by the spheroidal reflection surface.

Abstract: A solid-state laser apparatus may include a first oscillator, a laser light generator, and a plurality of stages of fiber amplifiers. The first oscillator may be configured to output seed light. The laser light generator may be configured to output a pulsed laser light beam generated on a basis of the seed light. The plurality of stages of fiber amplifiers may be disposed in series in an optical path of the pulsed laser light beam, and may include a final stage fiber amplifier. The final stage fiber amplifier may be located in a final stage in the plurality of stages of fiber amplifiers, and may include a silica fiber doped with erbium and ytterbium. A value as a result of division of a cross-sectional area of the silica fiber by a fiber length of the silica fiber may be in a range from 0.7 nm to 1.64 nm both inclusive.

Abstract: [Problem] It is intended to quantitatively evaluate deterioration in brain function associated with a disease such as dementia, with a high degree of accuracy by a simplified method using signals acquired from a few sensors arranged on the scalp.

Abstract: The present invention provides a spectral apparatus for spectrally separating light including a predetermined wavelength, including a slit that the light enters, a first optical system configured to collimate the light from the slit, a transmissive type diffraction element configured to diffract the light from the first optical system, and a second optical system including a first mirror configured to reflect the light diffracted by the transmissive type diffraction element, and a second mirror configured to reflect the light reflected by the first mirror and diffracted by the transmissive type diffraction element, and configured to make the light reciprocally travel between the first mirror and the second mirror via the transmissive type diffraction element.

Abstract: The present invention provides a spectral apparatus for spectrally separating light including a predetermined wavelength, including a slit that the light enters, a first optical system configured to collimate the light from the slit, a transmissive type diffraction element configured to diffract the light from the first optical system, and a second optical system including a first mirror configured to reflect the light diffracted by the transmissive type diffraction element, and a second mirror configured to reflect the light reflected by the first mirror and diffracted by the transmissive type diffraction element, and configured to make the light reciprocally travel between the first mirror and the second mirror via the transmissive type diffraction element.

Abstract: A clock transfer device is designed to perform long-distance transfer of a reference clock, which is generated based on a high-precision frequency standard, toward a remote place. The clock transfer device includes a first mode-locked laser for generating a first optical pulse train having a first repetition frequency and a first wavelength, and a second mode-locked laser for generating a second optical pulse train having a second repetition frequency and a second wavelength. The first optical pulse train is introduced into a resonator of the second mode-locked laser via a wavelength multiplexing coupler so that the second repetition frequency is passively synchronized with the first repetition frequency; then, the second optical pulse train is transmitted via a single mode fiber.

Abstract: A clock transfer device is designed to perform long-distance transfer of a reference clock, which is generated based on a high-precision frequency standard, toward a remote place. The clock transfer device includes a first mode-locked laser for generating a first optical pulse train having a first repetition frequency and a first wavelength, and a second mode-locked laser for generating a second optical pulse train having a second repetition frequency and a second wavelength. The first optical pulse train is introduced into a resonator of the second mode-locked laser via a wavelength multiplexing coupler so that the second repetition frequency is passively synchronized with the first repetition frequency; then, the second optical pulse train is transmitted via a single mode fiber.

Abstract: A timing synchronization device of a pulsed laser is composed of a first laser gain medium having a first gain region, a second laser gain medium having a second gain region that is not included in the first gain region, and first and second resonators provided with the first and second laser gain media, respectively, and arranged so that two laser pulses occurring in the first and second resonators, respectively, overlap with each other in one of the first and second laser gain media. The second laser gain medium has an oscillation wavelength at which the first laser gain medium crystal cannot cause oscillation.

Abstract: A timing synchronization device of a pulsed laser is composed of a first laser gain medium having a first gain region, a second laser gain medium having a second gain region that is not included in the first gain region, and first and second resonators provided with the first and second laser gain media, respectively, and arranged so that two laser pulses occurring in the first and second resonators, respectively, overlap with each other in one of the first and second laser gain media. The second laser gain medium has an oscillation wavelength at which the first laser gain medium crystal cannot cause oscillation.

Abstract: A process for the preparation of a polypeptide of the formula ##STR1## wherein A' is Pro, Gly, Asp or Ser; B' is Gly, Asn or Ser; C is Gln, Glu or Asp; D is Asn, Glu or Asp; X' is a residue of amino acid other than Met; E is Gln, Lys or Arg, and Y' is a residue of homoserine or homoserine-lactone, as well as a recombinant DNA and expression plasmid for preparing the polypeptide.

Abstract: A pharmaceutical composition for stimulating peristaltic contraction in the intestinal canal which contains a pharmaceutically acceptable carrier or excipient and an effective amount of a polypeptide, or a salt thereof, having a pharmacological activity similar to motilin. The polypeptide has the formula B.sub.1 -Z.sub.1 -A.sub.1 -Z.sub.2 -B.sub.2 -Thr-B.sub.3 -A.sub.2 -Glu-Z.sub.3 -C-Arg-X'-Gln-Glu-Lys-Glu-Arg-D-Lys-Gly-E-Y, with Z.sub.1,Z.sub.2 and Z.sub.3 each being an amino acid residue having a hydrophobic side-chain, A.sub.1 and A.sub.2 each being an amino acid residue such as Pro, Gly, Asn and Ser, B.sub.1, B.sub.2 and B.sub.