Abstract: The preferences of users using various contents are properly estimated. A system according to one embodiment includes a service control unit for controlling a whole service for providing digital contents, an information storage device, a determination unit for determining a user satisfying a predetermined condition concerning a usage history of musical pieces of the same artist to be a fan of that artist, a user information updating unit for storing a determination result in the information storage device, a posting accepting unit for accepting a post from a terminal device and storing the post in the information storage device, a feed information transmitting unit for extracting and transmitting feed information, and a recommended user information transmitting unit for choosing recommended users from other users determined to be fans of an artist of whom the user has been determined as a fan and transmitting information about the recommended users.

Abstract: An image forming apparatus includes an image bearing member having a photosensitive layer and a sub-surface layer having a charge transportability, overlying the photosensitive layer wherein the sub-surface layer is formed of a cured material formed of a radical polymerizable monomer having three or more functional groups with no charge transport structure and a radical polymerizable compound having a charge transport structure, wherein the arithmetical mean roughness WRa of about each of frequency components of HMH, HML, and HLH obtained by wavelet conversion of values measured by a surface texture and the contour form measuring device ranges from 0.0002 ?m to 0.005 ?m and WRa (LLH) is 0.05 ?m or less, wherein the sub-surface layer contains at least one of a particular oxazole compound or a particular diamine compound.

Abstract: An N-phenyl-diphenylisoindole derivative having the following formula (1): wherein each of R1 and R2 represents a hydrogen atom, a substituted or an unsubstituted alkyl group, a substituted or an unsubstituted alkoxy group, a substituted or an unsubstituted phenyl group, or a substituted or an unsubstituted phenoxy group; R3 represents a hydrogen atom, a substituted or an unsubstituted alkyl group, a substituted or an unsubstituted alkoxy group, a substituted or an unsubstituted phenyl group, a substituted or an unsubstituted phenoxy group, or has the following formula (2): wherein each of R4 and R5 represents a substituted or an unsubstituted alkyl group, or a substituted or an unsubstituted phenyl group; 1 represents an integer of from 1 to 4; and each of m and n represents an integer of from 1 to 5.

Abstract: An electrophotographic photoconductor including: an electrically conductive substrate; and at least a photoconductive layer thereon, wherein the photoconductive layer contains a diazapentadiene derivative represented by general formula (1): where “X” represents general formula (a), (b) or (c); “R1” and “R2” each represent substituted or unsubstituted alkyl group or aromatic hydrocarbon group, and may be the same or different; “R1” and “R2” may be joined together via “Y” to form a ring; “Y” represents single bond, oxygen atom, —CH2CH2—, or —CH?CH—, where “R3” represents substituted or unsubstituted alkyl group, aromatic hydrocarbon group, alkoxy group, alkoxycarbonyl group, or halogen group; “R4” represents substituted or unsubstituted alkyl or aromatic hydrocarbon group; “n” represents integer ranging from 0 to 4; and when “n” is integer of 2 to 4, “R3” may be the same or different.

Abstract: To provide an amine compound, represented by General Formula (I) below: [In General Formula (I), R1 and R2 represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon group, which may be identical or different; m and n are an integer of 1 or 0; Ar1 represents a substituted or unsubstituted aromatic hydrocarbon group; Ar2 and Ar3 represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aromatic hydrocarbon group; and Ar1 and Ar2 or Ar2 and Ar3 may bind to each other to form a substituted or unsubstituted heterocyclic group including a nitrogen atom.

Abstract: An image forming apparatus including at least an image bearing member having a substrate having a photosensitive layer thereon, the image bearing member to bear a latent electrostatic image on a surface thereof, a charging device to the surface of the image bearing member, an irradiation device to irradiate the surface of the image bearing member with light to form a latent electrostatic image thereon, a development device to develop the latent electrostatic with toner to obtain a developed image, a transfer device to transfer the developed image to a recording medium, and a cleaning device to clean the surface of the image bearing member, wherein the photosensitive layer includes naphthalene tetracarbonic acid diimide derivative as a charge transport material represented by the following Chemical Structure (1): In the Chemical Structure (1), Z represents a group represented by the following Chemical Formula (1): or the following Chemical Formula (2): —R9??Chemical Formula (2).

Abstract: An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer overlying the conductive substrate. The photosensitive layer comprises a phthalimide isoindole derivative having a specific chemical formula.

Abstract: An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer located overlying the conductive substrate. The photosensitive layer comprises a specific diamine compound.

Abstract: An electrophotographic photoconductor including: an electrically conductive substrate; and at least a photoconductive layer thereon, wherein the photoconductive layer contains a diazapentadiene derivative represented by general formula (1): where “X” represents general formula (a), (b) or (c); “R1” and “R2” each represent substituted or unsubstituted alkyl group or aromatic hydrocarbon group, and may be the same or different; “R1” and “R2” may be joined together via “Y” to form a ring; “Y” represents single bond, oxygen atom, —CH2CH2—, or —CH?CH—, where “R3” represents substituted or unsubstituted alkyl group, aromatic hydrocarbon group, alkoxy group, alkoxycarbonyl group, or halogen group; “R4” represents substituted or unsubstituted alkyl or aromatic hydrocarbon group; “n” represents integer ranging from 0 to 4; and when “n” is integer of 2 to 4, “R3” may be the same or different.

Abstract: A hydroxygallium porphyrazine derivative mixture including: a plurality of different hydroxygallium porphyrazine derivatives each represented by the following General Formula (A-2): where A1, A2, A3, A4, B1, B2, B3 and B4 each independently represent a nitrogen atom or a carbon atom bonded to hydrogen, with the proviso that both of A1 and B1 are carbon atoms each bonded to hydrogen or only one of A1 and B1 is a nitrogen atom, both of A2 and B2 are carbon atoms each bonded to hydrogen or only one of A2 and B2 is a nitrogen atom, both of A3 and B3 are carbon atoms each bonded to hydrogen or only one of A3 and B3 is a nitrogen atom, and both of A4 and B4 are carbon atoms each bonded to hydrogen or only one of A4 and B4 is a nitrogen atom.

Abstract: The present invention provides a naphthalenetetracarboxylic acid diimide derivative represented by the following general formula (1): wherein R1 and R2, which are identical or different, each represent a substituted or non-substituted alkyl group or a substituted or non-substituted aromatic hydrocarbon group; R3 represents an alkyl group having 1 to 8 carbon atoms or an aromatic hydrocarbon group; R4, R5, R6 and R7, which are identical or different, each represent a hydrogen atom, a substituted or non-substituted alkyl group, or a substituted or non-substituted aromatic hydrocarbon group; and R1 and R2 may be linked to form a substituted or non-substituted heterocyclic group including a nitrogen atom; with compounds where all of R1, R2 and R3 are a methyl group, and compounds where both of R1 and R2 are a methyl group and R3 is a 1-octyl group being excluded.

Abstract: An electrophotographic photoreceptor is provided that contains a conductive substrate, an undercoat layer, a charge generation layer, and a charge transport layer, wherein the under coat layer contains a binder resin and multiple inorganic pigments each having different average primary particle diameters in a total amount of from 75 to 86% by weight, the charge generation layer contains a binder resin and a titanyl phthalocyanine pigment having a specific X-ray diffraction spectrum in an amount of from 70 to 85% by weight, the charge transport layer comprises a specific distyryl compound, and the following formulae (2-1) to (2-3) are satisfied: 0.2?(D(F2)/D(G))?0.5??(2-1) 0.2?D(F1)??(2-2) D(F2)?D(F1)??(2-3) wherein D(F1) (?m) and D(F2) (?m) represent average primary particle diameters of the largest and smallest inorganic pigments, respectively, and D(G) (?m) represents an average primary particle diameter of the titanyl phthalocyanine pigment.

Abstract: An N-phenyl-diphenylisoindole derivative having the following formula (I): wherein each of R1 and R2 represents a hydrogen atom, a substituted or an unsubstituted alkyl group, a substituted or an unsubstituted alkoxy group, a substituted or an unsubstituted phenyl group, or a substituted or an unsubstituted phenoxy group; R3 represents a hydrogen atom, a substituted or an unsubstituted alkyl group, a substituted or an unsubstituted alkoxy group, a substituted or an unsubstituted phenyl group, a substituted or an unsubstituted phenoxy group, or has the following formula (2): wherein each of R4 and R5 represents a substituted or an unsubstituted alkyl group, or a substituted or an unsubstituted phenyl group; 1 represents an integer of from 1 to 4; and each of m and n represents an integer of from 1 to 5.

Abstract: An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer located overlying the conductive substrate which includes a naphthalenetetracarboxylic acid diimide derivative having a specific formula; and an image forming apparatus and a process cartridge using the electrophotographic photoreceptor are provided.

Abstract: An image bearing member including an electroconductive substrate, and a photosensitive layer provided overlying the electroconductive substrate, the photosensitive layer containing at least one charge transport materials selected from the group consisting of a naphthalene tetracarboxylic acid diimide-isoindol derivative represented by the following chemical structure 1, a naphthalimide-isoindol derivative represented by the following chemical structure 2, and a triphenyl amine-isoindol derivative represented by the following chemical structure 3, where R1 and R2 independently represent a hydrogen atom, a substituted or non-substituted alkyl group, an alkoxy group, a substituted or non-substituted aromatic hydrocarbon group, a halogen atom, and a nitro group, k represents an integer of 1 to 4, and l represents an integer of from 1 to 5 and R3 represents a substituted or non-substituted alkyl group, a substituted or non-substituted cycloalkyl group, and a substituted or non-substituted aromatic hydrocarbo

Abstract: An electrophotographic photoreceptor, including an electroconductive substrate; and a photosensitive layer, located overlying the electroconductive substrate, wherein an outermost layer of the electrophotographic photoreceptor includes an amine compound and a charge transport material, and wherein the amine compound includes an amine site having an electrostatic potential with a dimensionless unit not greater than ?0.27.

Abstract: An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer overlying the conductive substrate. The photosensitive layer comprises a phthalimide isoindole derivative having a specific chemical formula.

Abstract: An electrophotographic photoreceptor is provided, including an electroconductive substrate and a photosensitive layer located overlying the electroconductive substrate, wherein an outermost layer of the electrophotographic photoreceptor includes a resin including a graft copolymer in which a monomer having a polar group is graft polymerized to a polycarbonate resin, a polyarylate resin, or a copolymer thereof, and a filler; along with an image forming apparatus and a process cartridge using the electrophotographic photoreceptor.

Abstract: A method for preparing a photoreceptor including forming a photosensitive layer overlying an electroconductive substrate; coating a liquid including a radically polymerizable compound to form a protective layer; irradiating the protective layer with light to crosslink the protective layer; and then contacting the protective layer with a fluid, which is selected from the group consisting of supercritical fluids and subcritical fluids and which includes a charge transport material. A photoreceptor prepared by the method. An image forming method, an image forming apparatus and a process cartridge using the photoreceptor.

Abstract: The present invention provides an electrophotographic photoconductor capable of reducing latent electrostatic image stability defects caused by adhesion/adsorption of an electric discharge product formed by a charger in an image forming process, degradation of charge transportability and cleaning defects caused when removing a residual toner.