Abstract: A hydroponic cultivation system includes a plurality of seedbeds, a hanging part, and a transport mechanism. A plurality of seedlings of a plant to be cultivated is transplanted to side surfaces of the plurality of seedbeds. The hanging part hangs each of the plurality of seedbeds while the plurality of seedbeds is arranged in a predetermined horizontal direction from a planting side of the seedlings to a harvesting side of the seedlings. The transport mechanism transports the plurality of seedbeds in the predetermined horizontal direction while widening spaces between the seedbeds in the predetermined horizontal direction in a stepwise or continuous manner.

Abstract: A hydroponic system (1) is provided with a light-collecting apparatus (3) having a pair of reflecting plates (31a) that are vertically arranged in parallel with a culture surface (23) of a culture panel (21) of a hydroponic unit (2). During a process in which natural light taken from a light-collecting opening (30) propagates while repeatedly reflected by opposing reflecting surfaces of a reflecting plates (31a), by allowing seedlings p that are transplanted into the culture panel (21) to be irradiated with the light through a light-emitting hole (32) bored in the reflecting plate (31a), a culture object can be grown efficiently at a low cost by taking natural light from the outside.

Abstract: [Object] To provide a hydroponic cultivation system that is capable of transporting a seedbed with a simple mechanism and has excellent durability. [Solving Means] A hydroponic cultivation system includes a plurality of seedbeds, a hanging part, and a transport mechanism. A plurality of seedlings of a plant to be cultivated are transplanted to side surfaces of the plurality of seedbeds. The hanging part hangs each of the plurality of seedbeds while the plurality of seedbeds are arranged in a predetermined horizontal direction from a planting side of the seedlings to a harvesting side of the seedlings. The transport mechanism transports the plurality of seedbeds in the predetermined horizontal direction while widening spaces between the seedbeds in the predetermined horizontal direction in a stepwise or continuous manner.

Abstract: [Object] To suppress the variations in the growth of cultivation products to perform stable production, and reduce the power cost for applying artificial light. [Solving Means] A hydroponic cultivation system includes a hydroponic cultivation unit, a daylighting apparatus, an artificial light application apparatus, a daylighting sensor, and a control apparatus. The hydroponic cultivation unit includes a seedbed, a seedling of a plant to be cultivated being transplanted to the seedbed. The daylighting apparatus takes natural light through a daylighting port into a light emitting surface facing the seedbed, and emits the light from the light emitting surface toward the seedling. The artificial light application apparatus applies artificial light to the seedling. The daylighting sensor is provided at a position apart from the seedbed, and detects a light amount of the natural light emitted from the light emitting surface.

Abstract: A hydroponic system (1) is provided with a light-collecting apparatus (3) having a pair of reflecting plates (31a) that are vertically arranged in parallel with a culture surface (23) of a culture panel (21) of a hydroponic unit (2). During a process in which natural light taken from a light-collecting opening (30) propagates while repeatedly reflected by opposing reflecting surfaces of a reflecting plates (31a), by allowing seedlings p that are transplanted into the culture panel (21) to be irradiated with the light through a light-emitting hole (32) bored in the reflecting plate (31a), a culture object can be grown efficiently at a low cost by taking natural light from the outside.

Abstract: A subject of the present invention is to provide for a shadow mask material for a color picture tube with excellent tensile strength and excellent high temperature creep strength, a shadow mask made of the shadow mask material and a color picture tube with the shadow mask. Material for a shadow mask is made from low carbon steel containing manganese of equal or more than 0.60 wt % and aluminum of 0.002 to 0.12 wt %. A shadow mask is made of the material and the shadow mask is installed in a picture image tube.

Abstract: The present invention aims at providing a sophisticated segregation reducing technique which a conventional technique cannot achieve by finding the relationship between the casting structure and the segregation of components at the time of solidification and the heat treatment conditions. That is, the present invention aims at providing material for shadow masks which exhibits excellent quality with respect to streaks. A material for a shadow mask of the present invention is formed of a casting slab for preparing the shadow mask which comprises an Ni—Fe alloy containing 30 to 45% of Ni. The casting slab has a cast structure comprising a columnar crystal and/or a chill crystal in an amount of 99% or more. In particular, it is preferred that the casting slab contains no equiaxed crystal.

Abstract: A subject of the present invention is to provide for a shadow mask material for a color picture tube with excellent tensile strength and excellent high temperature creep strength, a shadow mask made of the shadow mask material and a color picture tube with the shadow mask. Material for a shadow mask is made from low carbon steel containing manganese of equal or more than 0.60 wt % and aluminum of 0.002 to 0.12 wt %. A shadow mask is made of the material and the shadow mask is installed in a picture image tube.