Abstract: A pedalling vehicle includes a main body, two control handles, two drive links, and a transmission link. The main body includes a front frame a front wheel, a rear frame, two rotation devices, two rear wheels, two cranks, and two connecting members. The rotation devices are connected by the transmission link through connection of the connecting members so that the rotation devices are rotatable synchronously and the rear wheels are movable with the rotation devices synchronously. Thus, the two rear wheels are turned synchronously by connection of the transmission link so as to turn and change the travel direction of the pedalling vehicle exactly.

Abstract: A display unit which is electronically connected to a body to display data, and has an antenna electronically connected thereto for transferring data. The body has a first element, a second element, an index unit and an intermediate element. The second element is coupled to the first element along a first axis, and the index unit is coupled to the second element along a second axis through the intermediate element and electronically connected to the display unit. The index unit is electronically connected to the display unit and provides a first index port and a second index port, allowing different function modes, respectively.

Abstract: A pedalling vehicle includes a main body, two control handles, two drive links, and a transmission link. The main body includes a front frame a front wheel, a rear frame, two rotation devices, two rear wheels, two cranks, and two connecting members. The rotation devices are connected by the transmission link through connection of the connecting members so that the rotation devices are rotatable synchronously and the rear wheels are movable with the rotation devices synchronously. Thus, the two rear wheels are turned synchronously by connection of the transmission link so as to turn and change the travel direction of the pedalling vehicle exactly.

Abstract: A furan-containing compound of formula (I): Ar is aryl, heteroaryl, or oligoaryl; A is furyl; B is aryl or heteroaryl; R1 is hydrogen, alkenyl, alkynyl, aryl, heteroaryl, cyclyl, heterocyclyl, or oligoaryl; and R2 is hydrogen, alkyl, alkenyl, alkynyl, aryl, heteroaryl, cyclyl, or heterocyclyl. The compound is useful as a hole transporting material in an organic light emitting diode device.

Abstract: The present invention is to provide a compact and easy-to-use hand-held communication electronic apparatus, which comprises a main housing having a display screen and control keys on the surface thereof, a first sliding keypad being combined with the main housing by means of a first rail, so that the first sliding keypad not only can be stored behind and parallel to the main housing, but also can be slid out from the bottom of the main housing; a second sliding keypad is combined with the first sliding keypad by means of a second rail, so that the second sliding keypad not only can be stored behind and parallel to the first sliding keypad, but also can be slid out from the side of the main housing.

Abstract: A display unit. Electronically connected to a body to display data, the unit has an antenna electronically connected thereto for transferring data. The body has a first element, a second element, an index unit and an intermediate element. The second element is coupled to the first element along a first axis, and the index unit is coupled to the second element along a second axis through the intermediate element and electronically connected to the display unit. The index unit is electronically connected to the display unit and provides a first index port and a second index port, allowing different function modes, respectively.

Abstract: A furan-containing compound of formula (I): 1

Abstract: A structure of the cassette with a card connector is disclosed. The cassette comprises a chassis, an upper metallic board, a lid, and a bottom metallic board. The upper metallic board is detachably mounted onto the top of the chassis by engaging a plurality of fitting elements of the upper metallic board with the receiving cavities and slots of the chassis. The slot of the lid is slid into the groove of the chassis, until the protruded shafts of the lid fits into the corresponding receiving cavities on the chassis, and a front part of the lid stacks on a distal plate of the upper metallic board for securely coupling the upper metallic board onto the chassis. Thus, the present invention not only allows the repair, or replacement of parts of the PCB, or the replacement of the PCB, but also reuse of the parts of the cassette.

Abstract: An interference apparatus is disclosed wherein the high-visibility quadrature interference signals are obtained by making a pair of polarization beamsplitter, a 45-degree oriented quarter-waveplate and four light-beam detected photodiodes. A three-dimensional interference optical configuration is made. The test-surface light beam and reference light beams are traveled on this optical configuration. The test-surface light beam and reference light beams have orthogonally linearly polarization state with each other. After they pass through the quarter-waveplate, one right circularly polarized light beam and one left circularly polarized light beam are produced. The vector sum of these two circularly polarized light beams is again a linearly polarized light beam which is then divided into two light beams by a non-polarization beamsplitter.