Disclosed is a vehicle head lamp includes: a plurality of lamps arranged in parallel with each other and each including a light source that emits light irradiated to a forward and a heat sink that radiates heat generated from the light source; a blower; and a lamp housing configured to accommodate the plurality of lamps and the blower. Each of the plurality of lamps includes a first lamp disposed in a blowing direction where air is blown by the blower, and a second lamp disposed on a flow path of the air flowing through the first lamp. The blower includes an air suction space into which the air flowing through the second lamp is sucked.

Disclosed is a case structure for a rear combination lamp in an automobile in which a rear combination lamp case in a corner portion formed in a rear portion of a vehicle is formed in a corner case having a substantial triangle pyramid shape by a rear plate, a side plate and a planner plate, wherein the rear plate forms a case rear face on which a concave notch portion is formed in a substantial center, wherein the side plate forms an air communication side face which is formed so as to gradually become narrower width toward a rear thereof, and wherein the planner plate forms a concave air communication path in a center thereof so that a terminal end of the concave air communication path communicates with the concave notch portion of the rear plate.

A vehicle light guard for protecting from damage an exposed vehicle light mounted on a fender of a tractor or on a fender of a similar type of vehicle. The light guard includes a tubular-shaped housing. The housing is adapted for receipt around the tractor light. The housing has sufficient width and diameter to cover the tractor light. The housing includes a light cord slit opening and a housing post hole adapted for receiving a threaded post attached to the tractor light and an electrical cord connected to a tractor battery. The post hole is center on a bottom portion of the housing. The threaded post and electrical cord are attached to a bottom of the vehicle light. The light cord slit opening and the housing post hole eliminate the need to disconnect the threaded post from the electrical cord, when attaching the tubular-shaped housing around the tractor light.

A system effective to communicate a message between two devices. A first device may include a plaintext to monoid element module effective to receive a plaintext message and apply a first function to the plaintext message to produce a first monoid element. A monoid element evaluator module may be effective to receive and insert submonoid generators into a monoid expression to produce a second monoid element in response. An encryption device module may be effective to apply a second function to the first monoid element, the second monoid element, the monoid expression, and a third monoid element to produce an encrypted plaintext message. Decryption may be performed on the encrypted plaintext message knowing the private key which includes the first function, the second function, the third monoid element and the submonoid generators list.

Disclosed is a vehicle head lamp includes: a plurality of lamps arranged in parallel with each other and each including a light source that emits light irradiated to a forward and a heat sink that radiates heat generated from the light source; a blower; and a lamp housing configured to accommodate the plurality of lamps and the blower. Each of the plurality of lamps includes a first lamp disposed in a blowing direction where air is blown by the blower, and a second lamp disposed on a flow path of the air flowing through the first lamp. The blower includes an air suction space into which the air flowing through the second lamp is sucked.

A burden on an operation of an operator is reduced. A working machine includes a grid light that projects a grid light of a grid-shaped pattern, and a control unit that control the vehicle in accordance with deformation of the pattern of the grid light according to a shape of a projection spot.

A system effective to communicate a message between two devices. A first device may include a plaintext to monoid element module effective to receive a plaintext message and apply a first function to the plaintext message to produce a first monoid element. A monoid element evaluator module may be effective to receive and insert submonoid generators into a monoid expression to produce a second monoid element in response. An encryption device module may be effective to apply a second function to the first monoid element, the second monoid element, the monoid expression, and a third monoid element to produce an encrypted plaintext message. Decryption may be performed on the encrypted plaintext message knowing the private key which includes the first function, the second function, the third monoid element and the submonoid generators list.

An illumination structure for decoration includes a light-guiding member and a decorative member on a surface of the light-guiding member. The decorative member has a plurality of lighting parts configured to light in a dot form. A lens layer is between the light-guiding member and the decorative member and includes a plurality of convex lens parts, each of the convex lens parts facing at least one of the lighting parts. Each of the convex lens parts has a convex lens surface on a surface facing the light-guiding member, the convex lens surface being configured to curve and protrude toward the light-guiding member and focus light adjacent to the lighting parts.

A system effective to communicate a message between two devices. A first device may include a plaintext to monoid element module effective to receive a plaintext message and apply a first function to the plaintext message to produce a first monoid element. A monoid element evaluator module may be effective to receive and insert submonoid generators into a monoid expression to produce a second monoid element in response. An encryption device module may be effective to apply a second function to the first monoid element, the second monoid element, the monoid expression, and a third monoid element to produce an encrypted plaintext message. Decryption may be performed on the encrypted plaintext message knowing the private key which includes the first function, the second function, the third monoid element and the submonoid generators list.

In a motor vehicle having motor vehicle exterior lighting devices and an operator control device, the following lighting modes of the motor vehicle exterior lighting devices can be set: deactivated, parking light, daytime running light, forwarding lighting, and automatic mode in which the motor vehicle exterior lighting devices are operated by an automatic forward light controller. The operator control device further has a single monostable operator control element by which the lighting modes can be set; or the operator control device has a monostable operator control element by which the deactivated, parking light, daytime running light and forward lighting lighting modes can be set. The operator control device has a pushbutton key or a toggle lever by which the automatic mode can be set.