Abstract: A vehicle loads at least one of a plurality of upper units having space to store a person or an object on an under unit including a drive mechanism that rotates wheels in the vehicle. The vehicle includes an under unit including a drive mechanism that rotates wheels and the at least one of the plurality of upper units loaded on the under unit. The under unit includes a loading unit, on which the at least one of the plurality of upper units as described above can be loaded. Each of the plurality of upper units includes a joint that joins to a different upper unit that is adjacently loaded.

Abstract: An ink includes water, a coloring material, an organic solvent having a solubility parameter of from 8.0 to 13.0, an urethane resin particle and a metal ion, wherein the organic solvent having the solubility parameter of from 8.0 to 13.0 has a proportion of from 10.0% by mass to 30.0% by mass to the ink, where the metal ion is at least one selected from an alkali metal ion and an alkaline earth metal ion, where the metal ion has a proportion of from 4000 mg/L to 8000 mg/L to the ink.

Abstract: An ink includes water, a coloring material, an organic solvent having a solubility parameter of from 8.0 to 13.0, an urethane resin particle and a metal ion, wherein the organic solvent having the solubility parameter of from 8.0 to 13.0 has a proportion of from 10.0% by mass to 30.0% by mass to the ink, where the metal ion is at least one selected from an alkali metal ion and an alkaline earth metal ion, where the metal ion has a proportion of from 4000 mg/L to 8000 mg/L to the ink.

Abstract: An active-energy-ray-curable composition, a cured material of the active-energy-ray-curable composition satisfying a critical load of 5.0 g or more but 25.0 g or less, the critical load being obtained by a continuous loading test method using a variable normal load friction and wear measurement device, the cured material having an average thickness of 10 ?m and being formed by coating the active-energy-ray-curable composition on a substrate and by irradiating and curing the active-energy-ray-curable composition with active energy rays having illuminance of 1.5 W/cm2 and an amount of irradiation of 200 mJ/cm2.

Abstract: An active-energy-ray-curable composition, a cured material of the active-energy-ray-curable composition satisfying a critical load of 5.0 g or more but 25.0 g or less, the critical load being obtained by a continuous loading test method using a variable normal load friction and wear measurement device, the cured material having an average thickness of 10 ?m and being formed by coating the active-energy-ray-curable composition on a substrate and by irradiating and curing the active-energy-ray-curable composition with active energy rays having illuminance of 1.5 W/cm2 and an amount of irradiation of 200 mJ/cm2.

Abstract: An aliphatic polyester having a number-average molecular weight of from 500,000 to 2,000,000 includes an ester bonding site and an amide bonding site. The content of the amide bonding site is from 1×10?3% to 1×10?1% by mol based on total weight of the ester bonding site and the amide bonding site.

Abstract: There is disclosed a method for producing a film with use of aerosol which is capable of forming a film of satisfactory quality at a high film formation rate. In the method, first, a carrier gas is mixed into a particle mixture which comprises raw fine particles comprising a brittle material as a main component and having a 50% average particle diameter of 0.010 ?m to 1.0 ?m on a volume basis, and auxiliary particles comprising a brittle material of the same type as or a different type from the brittle material of the raw fine particles as a main component and having a 50% average particle diameter of 3.0 ?m to 100 ?m on a volume basis, to form an aerosol. The aerosol is ejected onto the surface of a substrate to make the particle mixture come into collision with the substrate, so that the collision crushes or deforms the raw fine particles to form a film on the substrate.