Abstract: A modular circuit board that can quickly replace and assemble a port, comprises a first circuit board, at least one second circuit board connected to the first circuit board, at least one connecting post disposed between the first and second circuit boards, and at least one connecting component electrically connected to the first circuit board and the second circuit board; if the modular circuit board needs to replace different ports, it is only need to disassemble the connection post and replace the second circuit board of the second signal port, which not only can reduce the cost of production, and replacement and assembly is more convenient.

Abstract: A key structure including a bottom portion, a keycap, an elastic element and a positioning unit is provided. The keycap includes a plurality of fixing portions. The elastic element is configured between the bottom portion and the keycap. The positioning unit is fixed on the bottom portion and is assembled with the fixing portions. The keycap moves relative to the bottom portion via the positioning unit.

Abstract: A photocatalytic metal deposition process and a resulting nanocomposite are described. The nanocomposite includes an electrically conducting carbonaceous material, a photoactive metal oxide and a metal. Metals for deposition include noble metals, metal alloys and other transition metals in which the metal is laid down precisely and in a predetermined fashion on one or more surfaces of a composite. Deposition provides a high performance electrocatalyst for a number of suitable applications.

Abstract: A bathroom organizer for organizing various bathroom items including toilet tissue may include a vertical back wall, and a roll support frame connected to the vertical back wall. The roll support frame may include a guide device which extends inwards from the roll support frame and includes a concave portion to dispense toilet tissues. The guide device may include a first convex portion to allow a user to place a roll of toilet tissue into the roll support frame, and the guide device may include a second convex portion to position the roll of toilet tissue in a position to dispense the toilet tissue. The vertical back wall may cooperate with an inward sloping front wall to define a truncated V shaped magazine rack, and the bathroom organizer may include a first bottom wall to cooperate with the vertical back wall and the front wall to form a bottom for the magazine rack.

Abstract: A handle for measuring wheel includes a supporting section having a wheel support provided at a lower end thereof; a telescoping section movably connected to a first side of the supporting section, and having a plurality of longitudinally spaced locating holes; a locating unit provided on the supporting section at a predetermined position thereof, and including an elastic portion attached to an opposite second side of the supporting section, a pull tab outward extended from an outer side of the elastic portion, and a stopper located opposite to the pull tab to normally releasably engage with one of the locating holes on the telescoping section; and a wheel rotatably mounted to the wheel support. When the pull tab is pulled to disengage the stopper from the locating hole, the telescoping section may be freely slid to a desired height relative to the supporting section.

Abstract: A photocatalytic metal deposition process and a resulting nanocomposite are described. The nanocomposite includes an electrically conducting carbonaceous material, a photoactive metal oxide and a metal. Metals for deposition include noble metals, metal alloys and other transition metals in which the metal is laid down precisely and in a predetermined fashion on one or more surfaces of a composite. Deposition provides a high performance electrocatalyst for a number of suitable applications.

Abstract: A protractor for teaching aid includes a semicircular disk being provided along a curved section with angle marks and along a straight edge with length marks to form a main body of the protractor, and at a center with a locating hole or a locating bar; and at least one indicating strip being provided at two ends at one side with a short bar each, with a receiving hole correspondingly formed behind each short bar, and on one surface along a centerline with a central marker. The indicating strips may be rotatably connected at the short bars or the receiving holes to the locating hole or the locating bar, respectively, or rotatably connected end to end to form a polygon, so that the protractor has not only the function of measuring an angle, but also many other teaching functions.

Abstract: A connecting structure for T-square including a raised connecting section provided at an upper middle position of a crosspiece of the T-square, and a recessed fixing section correspondingly provided at a lower front end of a straight rule of the T-square for detachably receiving the raised connecting section therein. Therefore, the crosspiece and the straight rule of the T-square may be easily assembled to and disassembled from each other. And, the disassembled T-square may be conveniently carried or stored.