Abstract: A material decomposition apparatus for performing decomposition of a material in an object. The apparatus includes a data storage section for storing correction data preliminarily generated by decomposing one of three or more materials into the other two materials, a data input section to which radiation data of the object is inputted, the radiation data being divided into a plurality of energy levels, and a decomposition processing section for repeatedly performing two-material decomposition for decomposition of the other two materials of the three or more materials using the radiation data at different energy levels and the correction data to perform decomposition of the inside of the object into the three or more materials.

Abstract: A printed wiring board includes one or more substrates, the one or more substrates including at least a first substrate, the first substrate being formed with a pad and a ground layer at any one of main surfaces of the first substrate, the pad being to be electrically connected to a connector as another component, the ground layer being formed to surround the pad from a circumference of the pad and have an inner edge at a location separated from an outer edge of the pad with a predetermined distance, the ground layer being to be grounded to a ground contact.

Abstract: A printed wiring board includes one or more substrates, the one or more substrates including at least a first substrate, the first substrate being formed with a pad and a ground layer at any one of main surfaces of the first substrate, the pad being to be electrically connected to a connector as another component, the ground layer being formed to surround the pad from a circumference of the pad and have an inner edge at a location separated from an outer edge of the pad with a predetermined distance, the ground layer being to be grounded to a ground contact.

Abstract: A storage management system (10) is a system for connecting a client terminal (30) to a storage apparatus (111) via a communication network. The storage management system (10) includes: a communication unit (21) that receives a reservation request from the client terminal (30); a reservation management unit (221) that reserves a right of use and a time slot of use of the remaining capability of the storage capability in the storage apparatus (111) in accordance with the reservation request, and manages reservation information indicating the result of the reservation; and a ticket issuance unit (222) that issues a reservation ticket showing the reservation information to the client terminal (30), and transmits the reservation ticket to the client terminal (30). The ticket issuance unit (222) issues the reservation ticket only when the remaining capability is confirmed.

Abstract: The plug connector includes contacts and a block. The contacts are arranged on both sides of the block, and the block is formed at longitudinal ends with projection walls. The receptacle connector includes contacts and a housing. The contacts are arranged on both sides of the block to be opposite to each other in the width direction, and the housing is provided with engaging protrusions engaging the anchoring recess. The housing is further provided between the contacts longitudinally arranged with side walls A higher than upper surfaces of elastic portions of the contacts and with side walls B continuous with the side walls A and higher than upper surfaces of contact portions of the contacts. The plug contacts and the receptacle contacts are brought into contact with each other only after the plug connector and the receptacle connector have been completely fitted with each other.

Abstract: The invention provides an electrical connector achieving a reduced overall height and being capable of preventing an oblique fitting of a plug and a receptacle connector. The plug connector 20 includes contacts 24 and a block 22. The contacts are arranged on both sides of the block to be opposite to each other in the width direction, and the block 22 is formed at longitudinal ends with projection walls 32 higher than upper surfaces 38 of the contacts 24 and provided between the opposite contacts 24 with anchoring recess 34 engaging receptacle connector 50. The receptacle connector 50 includes contacts 54 and a housing 52. The contacts 54 are arranged on both sides of the block to be opposite to each other in the width direction, and the housing 52 is provided with engaging protrusions 64 engaging the anchoring recess 34 and at longitudinal ends with protrusion walls 68 higher than upper surfaces 70 of elastic portions of the contacts 54 and engaging grooves 66 for receiving the projection walls 32.

Abstract: A storage management system (10) is a system for connecting a client terminal (30) to a storage apparatus (111) via a communication network. The storage management system (10) includes: a communication unit (21) that receives a reservation request from the client terminal (30); a reservation management unit (221) that reserves a right of use and a time slot of use of the remaining capability of the storage capability in the storage apparatus (111) in accordance with the reservation request, and manages reservation information indicating the result of the reservation; and a ticket issuance unit (222) that issues a reservation ticket showing the reservation information to the client terminal (30), and transmits the reservation ticket to the client terminal (30). The ticket issuance unit (222) issues the reservation ticket only when the remaining capability is confirmed.

Abstract: A connector includes contacts and an insulator. Each contact includes a contact portion, a first fixed portion, an elastic portion substantially in the form of a crank, a second fixed portion and a connection portion. The insulator includes a fixation block to which the second fixed portions are fixed, and a movable housing to which the first fixed portions are fixed. The movable housing is fixed only to the contacts and held by the elastic portions in a floating condition away from the bottom surface of the fixation block. The fixation block has a wall for preventing short circuit when the connector is being mounted on a substrate. A floating amount of more than 0.7 mm can be achieved with a simple construction without causing short circuit with a substrate when the connector is being fitted with a mating connector and without causing any failed connection.

Abstract: An optical attenuator with increased dynamic range and reduced temperature-dependence over the dynamic range. The optical attenuator has a Faraday rotational angle variable device which applies an external magnetic field to light polarized by a garnet crystal, and a polarizer and an analyzer disposed at the front and rear of the optical axis of the device. There is an angle x formed between the plane of polarization of the light incident to the garnet crystal and the magnetic field orthogonal to the optical axis, where an angle y is formed between the polarizer and the analyzer, and the angle x is set to satisfy {(?z/2)+90×n}?12<x<{(?z/2)+90×n}+12 (n=0, 1, 2 or 3), where z=y±90; z is the angle of rotation of the plane of polarization caused by the Faraday rotational angle variable device.

Abstract: A connector includes contacts and an insulator. Each contact includes a contact portion, a first fixed portion, an elastic portion substantially in the form of a crank, a second fixed portion and a connection portion. The insulator includes a fixation block to which the second fixed portions are fixed, and a movable housing to which the first fixed portions are fixed. The movable housing is fixed only to the contacts and held by the elastic portions in a floating condition away from the bottom surface of the fixation block. The fixation block has a wall for preventing short circuit when the connector is being mounted on a substrate. A floating amount of more than 0.7 mm can be achieved with a simple construction without causing short circuit with a substrate when the connector is being fitted with a mating connector and without causing any failed connection.

Abstract: A reflection-type variable optical attenuator comprises: a main attenuator unit including a first birefringent crystal plate, a Faraday rotational angle varying unit, and a second birefringent crystal plate arranged in this order; an input port and an output port that are arranged on a side of one end of the main attenuator unit; and a two-point reflection-type optical path varying reflector that is arranged on a side of the other end of the main attenuator unit. Light that comes in from the input port makes a round trip in the main attenuator unit and goes out through the output port.

Abstract: Optical devices including a Faraday rotation devices improved in wavelength and temperature characteristics and an optical attenuator reduced in wavelength dependence and temperature-dependent loss. The Faraday rotation device has permanent magnets magnetized in an axial direction of through-holes, and Faraday elements having a same Faraday rotation direction with respect to a same magnetization direction. The permanent magnets are directed in the same magnetization direction along an optical path, where part of the Faraday elements are accommodated in the through-hole of the permanent magnet, and the remaining Faraday elements are arranged between the magnets, whereby the Faraday elements are to be applied by magnetic fields in opposite directions. For a device variable in Faraday rotation angle, an electromagnet is provided. An input fiber collimator and polarizer are provided on an input side of with the Faraday elements while an analyzer and output fiber collimator are on an output side.

Abstract: Optical devices including a Faraday rotation devices improved in wavelength and temperature characteristics and an optical attenuator reduced in wavelength dependence and temperature-dependent loss. The Faraday rotation device has permanent magnets magnetized in an axial direction of through-holes, and Faraday elements having a same Faraday rotation direction with respect to a same magnetization direction. The permanent magnets are directed in the same magnetization direction along an optical path, where part of the Faraday elements are accommodated in the through-hole of the permanent magnet, and the remaining Faraday elements are arranged between the magnets, whereby the Faraday elements are to be applied by magnetic fields in opposite directions. For a device variable in Faraday rotation angle, an electromagnet is provided. An input fiber collimator and polarizer are provided on an input side of with the Faraday elements while an analyzer and output fiber collimator are on an output side.

Abstract: Optical devices including a Faraday rotation devices improved in wavelength and temperature characteristics and an optical attenuator reduced in wavelength dependence and temperature-dependent loss. The Faraday rotation device has permanent magnets magnetized in an axial direction of through-holes, and Faraday elements having a same Faraday rotation direction with respect to a same magnetization direction. The permanent magnets are directed in the same magnetization direction along an optical path, where part of the Faraday elements are accommodated in the through-hole of the permanent magnet, and the remaining Faraday elements are arranged between the magnets, whereby the Faraday elements are to be applied by magnetic fields in opposite directions. For a device variable in Faraday rotation angle, an electromagnet is provided. An input fiber collimator and polarizer are provided on an input side of with the Faraday elements while an analyzer and output fiber collimator are on an output side.

Abstract: A variable optical attenuator is disclosed which comprises a plane-parallel birefringent element for separation/synthesis which separates light beams having orthogonal polarization directions on the same optical path, the birefringent element synthesizing light beams on different optical paths; a light converging lens disposed adjacent to the birefringent element for separation/synthesis; a reflecting mirror disposed at a focal point of the lens opposite to the birefringent element for separation/synthesis with respect to the lens; a variable polarization rotating device; and an input port and an output port which are disposed at the end of the birefringent element for separation/synthesis; the variable polarization rotating device being disposed at any position between the birefringent element for separation/synthesis and the reflecting mirror, the variable polarization rotating device controlling the rotational angle of the polarization direction of incident light beams from the input port, to thereby contr