Abstract: An aerial vehicle takeoff and landing system, an aerial vehicle takeoff and landing apparatus, and an aerial vehicle capable of reducing the influence of the ground effect and capable of taking off and landing smoothly even in a comparatively small and limited space. A pair of rails are arranged side by side with a gap therebetween, and are arranged with a space in an extension direction on at least an under side and one end side. An aerial vehicle has a suspension portion provided at an upper portion thereof so as to be inserted between the rails from the one end side. With the suspension portion is inserted between the rails, the aerial vehicle can be suspended at a predetermined landing position of the rails, and the aerial vehicle suspended at the landing position can take off.

Abstract: Movement data of a plurality of positions on an observation object performing a predetermined movement action is acquired, feature data is generated by performing frequency analysis on the movement data, a transition sequence of a primitive action is extracted by segmenting the feature data, and based on the transition sequence and an action model obtained by learning a transition sequence of a primitive action obtained by segmenting a movement state of a training object performing a movement action, an occurrence rate of the primitive action in the predetermined movement action is analyzed to extract a pattern of the primitive action, thereby predicting an end timing of the predetermined movement action.

Abstract: A passive guidance mechanism enables smooth guiding to a desired position; and a flying object landing system enables smooth guiding to and landing at a desired position. A pair of guide rails are arranged side by side with a space therebetween, and are provided so that the space increases toward one set of tips of the guide rails. One guide rail is supported so as to be rotatable about a first shaft extending in a direction perpendicular to a plane including the guide rails, at or near the tip of the guide rail. The other guide rail is supported so as to be rotatable about a second shaft extending in a direction perpendicular to the plane including the guide rails, at or near the tip of the guide rail.

Abstract: An aerial vehicle takeoff and landing system, an aerial vehicle takeoff and landing apparatus, and an aerial vehicle capable of reducing the influence of the ground effect and capable of taking off and landing smoothly even in a comparatively small and limited space. A pair of rails are arranged side by side with a gap therebetween, and are arranged with a space in an extension direction on at least an under side and one end side. An aerial vehicle has a suspension portion provided at an upper portion thereof so as to be inserted between the rails from the one end side. With the suspension portion is inserted between the rails, the aerial vehicle can be suspended at a predetermined landing position of the rails, and the aerial vehicle suspended at the landing position can take off.

Abstract: An image pickup lens includes a first lens having a positive meniscus shape convex toward an object side, a second lens disposed on an image side of the first lens and has a meniscus shape convex toward the image side, and an aperture stop disposed on the object side of the image side surface of the first lens, and satisfies conditional expressions given below, in which f is a focal length of the entire system, R2 is a paraxial radius of curvature of the object side of the first lens, R3 is a paraxial radius of curvature of the image surface of the first lens, and DD is a distance on the optical axis between the first and second lenses: 0.45<R2/R3<0.66; and 0.05<DD/f?0.117.

Abstract: An image pickup lens includes a first lens having a positive meniscus shape convex toward an object side, a second lens disposed on an image side of the first lens and has a meniscus shape convex toward the image side, and an aperture stop disposed on the object side of the image side surface of the first lens, and satisfies conditional expressions given below, in which f is a focal length of the entire system, f1 is a focal length of the first lens, f2 is a focal length of the second lens, R5 is a paraxial radius of curvature of the object side surface of the second lens, and R6 is a paraxial radius of curvature of the image side surface of the second lens. 1.00<f1/f<1.50 1.1<f2/f1<3.9 2.0<(R5+R6)/(R5?R6)<5.

Abstract: On condition that a first lens group adopts at least one plastic lens; a second lens group adopts at least any two adjacent plastic lenses; the first lens group monotonously moves from an object side to an image plane side in a zooming; the second lens group monotonously moves from the image plane side to the object side; wherein fw/fpi represents a ratio of refractive power of the entire system achieved at a wide angle end to refractive power of the respective lenses; P1 represents a total of fw/fpi of the plastic lenses of the first lens group; and P2 represents a total of fw/fpi of the plastic lenses of the second lens group, the following conditional expressions ?0.22<P1<?0.01 and ?0.15<P2<?0.03, are both fulfilled.

Abstract: On condition that a first lens group adopts at least one plastic lens; a second lens group adopts at least any two adjacent plastic lenses; the first lens group monotonously moves from an object side to an image plane side in a zooming; the second lens group monotonously moves from the image plane side to the object side; wherein fw/fpi represents a ratio of refractive power of the entire system achieved at a wide angle end to refractive power of the respective lenses; P1 represents a total of fw/fpi of the plastic lenses of the first lens group; and P2 represents a total of fw/fpi of the plastic lenses of the second lens group, conditional expressions (1) and (2) provided below are fulfilled. ?0.22<P1<?0.01??(1) ?0.15<P2<?0.

Abstract: To provide a lens system advantageous for downsizing a moving group and suitable for large aperture ratio formation and ultra telescopic formation while maintaining an excellent optical function from a long distance to a close range. A first lens group having a positive refracting power, a second lens group having a negative refracting power, a third lens group having a positive refracting power, and a fourth lens group having a negative refracting power are provided in order from an object side. The first lens group includes a first sub group and a second sub group. The second sub group is provided with a refracting power stronger than that of the first sub group and a following condition equation is satisfied. 1.5<f1a/f1b<2.2??(1) where, f1a denotes a focal length of the first sub group and f1b denotes a focal length of the second sub group.

Abstract: To provide a lens system advantageous for downsizing a moving group and suitable for large aperture ratio formation and ultra telescopic formation while maintaining an excellent optical function from a long distance to a close range. A first lens group having a positive refracting power, a second lens group having a negative refracting power, a third lens group having a positive refracting power, and a fourth lens group having a negative refracting power are provided in order from an object side. The first lens group includes a first sub group and a second sub group. The second sub group is provided with a refracting power stronger than that of the first sub group and a following condition equation is satisfied. 1.5<f1a/f1b<2.2 ??(1) where, f1a denotes a focal length of the first sub group and f1b denotes a focal length of the second sub group.

Abstract: A zoom lens is provided and has: a first lens of a negative lens; a second lens of a positive lens; an aperture stop; a third lens of a negative lens; and a fourth lens of a positive lens in this order from an object side of the zoom lens. A zooming operation of the zoom lens is performed by varying mutual distances among the first to fourth lenses, and the zoom lens satisfies specific conditional expressions.

Abstract: A zoom lens is provided and has: a first lens of a negative lens; a second lens of a positive lens; an aperture stop; a third lens of a negative lens; and a fourth lens of a positive lens in this order from an object side of the zoom lens. A zooming operation of the zoom lens is performed by varying mutual distances among the first to fourth lenses, and the zoom lens satisfies specific conditional expressions.

Abstract: Medicines for the prevention and treatment of neurodegenerative diseases such as Alzheimer's disease and schizophrenia of mammals (including human beings) through the retardation or inhibition of neurodegeneration due to hypofunction of glutamic acid receptor and which contain as an active ingredient 5-substituted-3-oxadiazolyl-1,6-naphthyridin-2(1H)-one derivatives of the formula (I): wherein Het is oxadiazolyl; R1 is hydrogen, lower alkyl, cyclo-lower alkyl, lower alkenyl, lower alkoxy, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, etc.; and R2 is hydrogen, lower alkyl, cyclo-lower alkyl, substituted or unsubstituted aryl, etc., or physiologically acceptable acid addition salts thereof.

Abstract: A [5-chloro-6-phenyl-2-(4-trifluoromethylphenyl)-4-pyrimidinyl-amino]acetamide derivative of the formula (I): wherein R1 is a methyl group or a cyclopropyl group, and a pharmaceutical composition containing the same. Said compounds exhibit a potent anti-rheumatoid activity and show low toxicity, and hence, they are useful as an agent for prophylaxis or treatment of immuno inflammatory diseases such as rheumatoid diseases (e.g., rheumatoid arthritis, Behcet disease, ankylosing spondylitis, etc.) and autoimmune diseases (e.g., multiple sclerosis, systemic lupus erythematosus, Sjögren syndrome, etc.).

Abstract: Medicines for the prevention and treatment of neurodegenerative diseases such as Alzheimer's disease and schizophrenia of mammals (including human beings) through the retardation or inhibition of neurodegeneration due to hypofunction of glutamic acid receptor and which contain as an active ingredient 5-substituted-3-oxadiazolyl-1,6-naphthyridin-2(1H)-one derivatives of the formula (I): 1

Abstract: A standard photographic lens is disclosed that includes a front lens group, a diaphragm stop, and a rear lens group, in order from the object side. The front lens group is formed of a negative meniscus lens with its convex surface on the object side, and a positive meniscus lens with its convex surface on the object side. The rear lens group is formed of a third lens element of negative refractive power with a concave surface on the object side, a fourth lens element of positive refractive power with a convex surface on the image side, and a fifth lens element, of meniscus shape with its concave surface on the image side. Organic material is preferably used for the second and third lens elements. Various conditions are satisfied so as to provide a lens having a bright image with favorably corrected aberrations.

Abstract: A standard photographic lens is disclosed that includes a front lens group, a diaphragm stop, and a rear lens group, in order from the object side. The front lens group is formed of a negative meniscus lens with its convex surface on the object side, and a positive meniscus lens with its convex surface on the object side. The rear lens group is formed of a third lens element of negative refractive power with a concave surface on the object side, a fourth lens element of positive refractive power with a convex surface on the image side, and a fifth lens element, of meniscus shape with its concave surface on the image side. Organic material is preferably used for the second and third lens elements. Various conditions are satisfied so as to provide a lens having a bright image with favorably corrected aberrations.

Abstract: A Gaussian lens for photography includes, in order from the object side, a front lens group, a stop, and a rear lens group. The front lens group is formed of, in order from the object side, a first lens element and a second lens element, each of positive meniscus shape with their convex surfaces on the object side, and a third lens element that has a negative meniscus shape with its convex surface on the object side. The rear lens group is formed of, in order from the object side, a fourth lens element which has a negative meniscus shape with its concave surface on the object side, and fifth and sixth lens elements each of which is a positive meniscus lens with its convex surface on the image side. Each lens element surface is spaced from any adjacent lens elements so that no lens element surfaces are joined to form a combined lens.

Abstract: There is described a data-imprinting optical system for use with a camera which is composed of a single meniscus lens having a positive refracting power and a brightness aperture, which can be applied to a low-cost unsophisticated camera of manual advance type by satisfying predetermined conditional equations, and which enables miniaturization of and space-saving in a camera. Specifically, the data-imprinting optical system includes a single positive meniscus lens and a brightness aperture disposed on the part of a data display member. The positive meniscus lens is a plastic lens having an aspherical concave surface on the part thereof facing the data display member. An image of display information appearing on the data display member is projected on a film surface.

Abstract: A compact, real-image-type zoom finder having a high zoom ratio and high optical performance is provided. The finder is formed of an objective optical system and an erecting eyepiece. The objective optical system is formed of, in order from the object side, a first lens element having negative refractive power with a concave surface on the object side, a second lens element having positive refractive power, and a third lens element that is a positive meniscus lens with its convex surface on the object side. The erecting eyepiece is formed of an erecting prism having refractive surfaces integrally formed on the input end and output end of the erecting prism. The magnification of the finder is changed by moving the second lens element along the optical axis, and the third lens element is moved along the optical axis in order to adjust for what would otherwise be a shifting in image surface position with the change in magnification.