Abstract: A mining riser pipe is extended from above water toward a water bottom containing water bottom resources, and a lower portion of an insertion pipe connected to a lower portion of the mining riser pipe is inserted into the water bottom. A liquid is supplied into the insertion pipe and a rotation shaft extends axially inside both of pipes is rotated to rotate stirring blades attached to a lower portion of the rotation shaft inside the insertion pipe, thereby drilling and dissolving mud S inside the insertion pipe into a slurry form is raised to an upper portion of the insertion pipe by a stirring flow generated by the rotation of the stirring blades, and the raised mud is lifted above the water through the mining riser pipe by lifting force.

Abstract: A mining riser pipe is extended toward a water bottom, and a lower portion of an insertion pipe connected to a lower portion of the mining riser pipe is inserted into the water bottom. A liquid is supplied into the insertion pipe, and a rotation shaft extends inside both pipes and stirring blades attached to a lower portion of the rotation shaft are rotated inside the insertion pipe, thereby drilling and dissolving mud inside the insertion pipe into a slurry. Then, the mud S is raised to an upper portion of the insertion pipe by a stirring flow generated by the stirring blades, and the raised mud slurry is lifted above the water through the mining riser pipe 2, and a rotation speed of the stirring blades is lower in an initial process at an early stage of the drilling than in a subsequent process.

Abstract: A triazine ring-containing polymer including a structural unit represented by General Formula 1: *-[A-B-]-*??General Formula 1 wherein, in General Formula 1, A is represented by General Formula 2, B is represented by General Formula 3, and * indicates a point linked to another group or structural unit: wherein, in General Formula 2 and General Formula 3, L, R1 to R6, m1, n1, and * are the same as defined in the detailed description.

Abstract: A triazine ring-containing polymer having a high refractive index and a low birefringence, and being capable of being subjected to injection molding, wherein the polymer having a repeating unit of *-[A-B-]-*, including a structural unit A derived from a triazinedithiol compound, and a structural unit B including an aromatic hydrocarbon group; and a thermoplastic resin, a thermoplastic article, and an optical part including the polymer.

Abstract: Disclosed are a triazine ring-containing polymer having a repeating unit that comprises a structural unit derived from a triazinedithiol compound, the triazine ring-containing polymer having a yellowness index of less than 3 and comprising terminal SH groups, wherein at least a portion of the SH groups are capped with a hydrocarbon group, and a number of the SH groups in the triazine ring-containing polymer is less than about 1×1018 per gram of the polymer, and a thermoplastic article and optical part including the polymer.

Abstract: A polishing slurry including a hydrophilic nanocarbon particle having a nitrogen-containing functional group, and a weight ratio of a nitrogen element relative to a carbon element of the hydrophilic nanocarbon particle, the weight ratio expressed as N/C×100% is greater than or equal to about 5 wt %, and a method of manufacturing a semiconductor device using the polishing slurry.

Abstract: Provided are a condensed cyclic compound represented by Formula 1, an organic light-emitting device including the condensed cyclic compound, and an electronic apparatus including the organic light-emitting device: wherein, in Formula 1, the substituents may be understood by referring to the detailed description.

Abstract: Provided are a condensed cyclic compound represented by Formula 1 and an organic electroluminescent device including the cyclic compound: wherein, the substituents in Formula 1 are the same as described in the detailed description.

Abstract: Provided are a heterocyclic compound, an organic light-emitting device including the heterocyclic compound, and an electronic apparatus including the organic light-emitting device, the heterocyclic compound including: a group represented by Formula 1; a group represented by Formula 2; and one to four groups each independently represented by Formula 3 or 4: The substituents in Formulae 1 to 4 are the same as described in the detailed description.

Abstract: Provided are a heterocyclic compound represented by Formula 1, an organic light-emitting device including the same, and an electronic apparatus including the organic light-emitting device: The substituents in Formula 1 are the same as described in the detailed description.

Abstract: Provided are a condensed cyclic compound represented by Formula 1, an organic light-emitting device including the condensed cyclic compound, and an electronic apparatus including the light-emitting device: wherein details of Formula 1 are the same as described in the present specification.

Abstract: Provided are a condensed cyclic compound represented by Formula 1-1 or 1-2, an organic light-emitting device including the condensed cyclic compound, and an electronic apparatus including the organic light-emitting device: wherein Formulae 1-1 and 1-2 are the same as described in the present specification.

Abstract: The present disclosure relates to a nitrogen-containing condensed cyclic compound having a particular structure and satisfying a particular condition. The present disclosure also relates to a fluorescence emitter that includes the nitrogen-containing condensed cyclic compound having a particular structure and is used together with a phosphorescent complex. In addition, the present disclosure relates to a material for the organic electroluminescent device, including the nitrogen-containing condensed cyclic compound having a particular structure and a phosphorescent complex. Moreover, the present disclosure relates to an organic electroluminescent device including the nitrogen-containing condensed cyclic compound, the fluorescence emitter, and the material for an organic electroluminescent device.

Abstract: Provided are a heterocyclic compound represented by Formula 1 and Formula 2, an organic light-emitting device including the heterocyclic compound, and an electronic apparatus including the organic light-emitting device: wherein, in Formula 1 and Formula 2, the substituents may be understood by referring to the detailed description.

Abstract: A polishing slurry including a hydrophilic nanocarbon particle having a nitrogen-containing functional group, and a weight ratio of a nitrogen element relative to a carbon element of the hydrophilic nanocarbon particle, the weight ratio expressed as N/C×100% is greater than or equal to about 5 wt %, and a method of manufacturing a semiconductor device using the polishing slurry.

Abstract: A polishing slurry including a hydrophilic nanocarbon particle having a nitrogen-containing functional group, and a weight ratio of a nitrogen element relative to a carbon element of the hydrophilic nanocarbon particle, the weight ratio expressed as N/C×100% is greater than or equal to about 5 wt %, and a method of manufacturing a semiconductor device using the polishing slurry.

Abstract: A triazine ring-containing polymer having a high refractive index and a low birefringence, and being capable of being subjected to injection molding, wherein the polymer having a repeating unit of *-[A-B-]-*, including a structural unit A derived from a triazinedithiol compound, and a structural unit B including an aromatic hydrocarbon group; and a thermoplastic resin, a thermoplastic article, and an optical part including the polymer.

Abstract: Disclosed are a triazine ring-containing polymer having a repeating unit that comprises a structural unit derived from a triazinedithiol compound, the triazine ring-containing polymer having a yellowness index of less than 3 and comprising terminal SH groups, wherein at least a portion of the SH groups are capped with a hydrocarbon group, and a number of the SH groups in the triazine ring-containing polymer is less than about 1×1018 per gram of the polymer, and a thermoplastic article and optical part including the polymer.

Abstract: A polishing slurry including a composite including a hydrophilic fullerene and an ionic compound, a method of manufacturing the same, and a method of manufacturing a semiconductor device.

Abstract: A triazine ring-containing polymer including a structural unit represented by General Formula 1: *-[A-B-]-*??General Formula 1 wherein, in General Formula 1, A is represented by General Formula 2, B is represented by General Formula 3, and * indicates a point linked to another group or structural unit: wherein, in General Formula 2 and General Formula 3, L, R1 to R6, m1, n1, and * are the same as defined in the detailed description.