Abstract: A developer includes a toner containing toner particles and a carrier containing carrier particles. The toner particles each include a toner mother particle and external additive particles attached to a surface of the toner mother particle. The external additive particles include first silica particles and spacer particles. The first silica particles have a number average primary particle diameter of at least 10 nm and no greater than 30 nm. The spacer particles have a number average primary particle diameter of at least 32 nm and no greater than 145 nm. The spacer particles in the toner particles have a coverage ratio of at least 2.0% by area and no greater than 40.0% by area. The carrier particles each include a carrier mother particle and strontium titanate particles attached to a surface of the carrier mother particle.

Abstract: Toner particles in a developer include first strontium titanate particles attached to the surface of each toner mother particle thereof. The first strontium titanate particles have a content ratio of 0.3 to 0.9 parts by mass to 100.0 parts by mass of the toner mother particles. In the developer, coat layers of carrier mother particles of first carrier particles contain barium titanate particles and a coating resin including silicone resin. The barium titanate particles have a content ratio of 2 to 47 parts by mass to 100 parts by mass of the coating resin. Second strontium titanate particles attached to the surfaces of the carrier mother particles have a diameter of 15 to 85 nm.

Abstract: A developer set includes a first developer and a second developer. The first developer contains a first toner containing first toner particles and a first carrier containing first carrier particles. The second developer contains a second toner containing second toner particles and a second carrier containing second carrier particles. The first toner particles and the second toner particles each include a toner mother particle and external additive particles attached to the surface of the toner mother particle. The external additive particles include spacer particles. The spacer particles have a number average primary particle diameter of at least 32 nm and no greater than 145 nm. The first carrier particles each include a first carrier mother particle and strontium titanate particles attached to the surface of the first carrier mother particle.

Abstract: A schedule creation assisting device 100 includes: a storage unit that stores information on a total working time length in a specified period of each of workers who work in cooperation in a specified operation, a number of the workers necessary at each timing during the period, and a constraint condition regarding allocation of the workers to the operation; and a computation unit 104 that computes an Ising model in which, regarding an objective function including, as terms, the total working time length in the period, the number of necessary workers, and a constraint condition function that is minimized when the constraint condition is satisfied, whether each of the workers is to attend at work is set as a spin, and a sensitivity between variables of the constraint condition function is set as an intensity of interaction between the spins, and that outputs a schedule in which whether each of the workers is to attend at work at the each timing during the specified period is specified based on the result.

Abstract: A portfolio creation assistance device 100 includes: a calculation unit 104 configured to calculate a predetermined formula as an Ising model based on attribute information on each of financial instruments and information on an expected loss in each of the financial instruments associated with scenarios of event occurrence, the predetermined formula describing expected revenues and expected losses associated with the event occurrence corresponding to each of predetermined scenario groups when the predetermined scenario group is adopted to a portfolio formed by combining the financial instruments at predetermined ownership ratios. The calculation unit 104 is configured to output to a predetermined device information on the ownership ratios at which profitability obtained from the expected revenues and the expected losses as a result of the calculation is high.

Abstract: A carrier includes carrier particles. The carrier particles include first carrier particles and second carrier particles. The first carrier particles each include a first carrier core and a first coat layer covering a surface of the first carrier core. The second carrier particles each include a second carrier core and a second coat layer covering a surface of the second carrier core. The first coat layers contain no fatty acid metal salt. The second coat layer contains a coat layer binder resin and a fatty acid metal salt. The second coat layers contain the fatty acid metal salt in a proportion of from 85 mass % to 95 mass % relative to a total mass of the second coat layers. The second carrier particles are contained in a proportion of from 7 mass % to 15 mass % relative to a total mass of the first carrier particles and the second carrier particles.

Abstract: A carrier includes carrier particles. The carrier particles include first carrier particles and second carrier particles. The first carrier particles each include a first carrier core and a first coat layer covering a surface of the first carrier core. The second carrier particles each include a second carrier core and a second coat layer covering a surface of the second carrier core. The first coat layers contain no fatty acid metal salt. The second coat layer contains a coat layer binder resin and a fatty acid metal salt. The second coat layers contain the fatty acid metal salt in a proportion of from 85 mass % to 95 mass % relative to a total mass of the second coat layers. The second carrier particles are contained in a proportion of from 7 mass % to 15 mass % relative to a total mass of the first carrier particles and the second carrier particles.

Abstract: A capsule toner for developing an electrostatic charge image includes a plurality of toner particles. Each of the toner particles includes a core and a shell layer disposed over a surface of the core. The cores have a zeta potential at pH 4 of less than 0 V, and the toner particles have a zeta potential at pH 4 of greater than 0 V. The shell layers have a hardness of at least 1 N/m2 and less than 3 N/m2. The shell layers have a thickness of no greater than 20 nm. The toner particles have a roundness of at least 0.965 and less than 0.975.

Abstract: An electrostatic charge image developing toner contains a plurality of toner particles. Each of the toner particles includes a toner core containing a binder resin and a shell layer coating the toner core. The shell layers contain a thermosetting resin. The toner cores have a negative zeta potential in an aqueous medium adjusted to pH 4. The toner particles have a positive zeta potential in an aqueous medium adjusted to pH 4. The shell layers have a film thickness of 1 nm or more and 20 nm or less.

Abstract: A capsule toner for developing an electrostatic charge image includes a plurality of toner particles. Each of the toner particles includes a core and a shell layer disposed over a surface of the core. The cores have a zeta potential at pH 4 of less than 0 V, and the toner particles have a zeta potential at pH 4 of greater than 0 V. The shell layers have a hardness of at least 1 N/m2 and less than 3 N/m2. The shell layers have a thickness of no greater than 20 nm. The toner particles have a roundness of at least 0.965 and less than 0.975.

Abstract: An electrostatic charge image developing toner contains a plurality of toner particles. Each of the toner particles includes a toner core containing a binder resin and a shell layer coating the toner core. The shell layers contain a thermosetting resin. The toner cores have a negative zeta potential in an aqueous medium adjusted to pH 4. The toner particles have a positive zeta potential in an aqueous medium adjusted to pH 4. The shell layers have a film thickness of 1 nm or more and 20 nm or less.

Abstract: A light emitting transistor of the present invention has a light emitting layer, both a source electrode and a drain electrode both of which are connected with the light emitting layer electrically, an insulation layer arranged on the light emitting layer, a gate electrode arranged on the insulation layer. The light emitting layer is made from an organic semiconductor material. The light emitting transistor has also a periodic structure and the gate electrode to which an AC voltage is applied. And the emission intensity can be high, and width of the emission spectrum can be reduced. In addition, it is easy to control the amplitude of the emitting light and the width of emission spectrum reproducibly.