Abstract: Disclosed is an air conditioner that can operate in a general cooling mode in which indoor air is cooled by heat exchange with a first refrigerant in a main evaporator, or alternatively in a fast cooling mode in which the indoor air is primarily cooled by heat exchange in a midway heat exchanger which includes the main evaporator for the first refrigerant and a fast cooling condenser for a second refrigerant, and then re-cooled in a fast cooling evaporator for the second refrigerant. Accordingly, fast and agreeable air cooling can be achieved.

Abstract: A composite photocatalyst includes a semiconducting core and a nanoscale particle disposed on a surface of the semiconducting core, wherein the nanoscale particle is an electron carrier, and wherein the photocatalyst is sensitive to visible light irradiation.

Abstract: In an air conditioner, in a general cooling mode, an indoor air is cooled by heat exchange with a main evaporator of a first refrigerant, while in a rapid cooling mode, an indoor air is cooled by heat exchange with an intermediate heat exchanger consisting of a main evaporator of the first refrigerant and a rapid cooling condenser of a second refrigerant and then re-cooled in a rapid cooling evaporator of the second refrigerant, thereby performing a cool and pleasant cooling operation immediately whenever necessary.

Abstract: A flexible PCB is provided with surplus bends so that it can be readily bent according to the repetitive movement thereof, whereby wires formed in the flexible PCB can be prevented from being severed by the bending fatigue accumulated due to the movement. The flexible PCB for use in electronic equipment acts to transmit electrical signals between two rigid PCBs and acts as a structural bridge therebetween, the two rigid PCBs being spaced away from each other and being able to relatively move. The flexible PCB includes: a plurality of wires, each functioning as a passageway for electrical signals; and a soft material-based substrate body in which the wires are formed; and being provided with surplus bends at predetermined positions so as to allow the flexible PCB to resiliently move according to the relative movement of the rigid PCBs.

Abstract: A vertical organic thin film transistor is provided along with an organic light-emitting transistor, which is characterized in that an active layer is formed of a p-type organic semiconductor compound having a dielectric constant of 3.5 or more, and work function values of an anode and a cathode are different from each other. The vertical organic thin film transistor is advantageous because it exhibits excellent current-voltage properties due to a short channel length, and has simple fabrication processes. Also, in the vertical organic thin film transistor, current properties in response to the gate voltage are of an enhancement type. Therefore, the vertical organic thin film transistor may be fabricated into the organic light-emitting transistor through a simple process.

Abstract: A single button six-way sunroof switch includes a case; a knob base which has a coupling hole, hooks, and a hinge hole; a knob with coupling grooves, wherein the hooks of the knob base are engaged with the coupling grooves; a light emitting rod having a latching jaw, which is latched with the upper end of the knob base around the coupling hole; a lever integrally formed with the light emitting rod; a slider which has a panel with a through-hole, support legs extended from corners of the panel, and a hinge pin; a contact having a body part coupled to the lever, which passes through the through-hole of the slider, and contact-point legs extended from the body part in four directions; and a Printed Circuit Board having tact switches to be pushed by the lever and a plurality of contact points contacted by the contact-point legs.

Abstract: A method for assigning a channel in multi-FA CDMA mobile communication system according to the received power prevents communication quality of a FA from being inferior to that of the others by managing the interference level of the FA. The method comprises the steps of: comparing a first threshold value with received power when the base station receives a new call request; assigning a traffic channel in a first FA of the request, if the received power is less than the first threshold value, and searching a second FA of which received power is least, if not; comparing a second threshold value with the received power of the second FA; and assigning a traffic channel in the second FA if the received power is less than the second threshold value, and rejecting the request, if not.

Abstract: A substantially pure phase LaTaO4 photocatalyst is prepared by grinding precursors with mixture of at least two different sizes of high-density yttrium-stabilized zirconia balls to a very fine particle size and calcining the ground precursors. The LaTaO4 photocatalyst prepared by this method is useful in photolysis of water.

Abstract: A particulate material is ground more efficiently using a mixture of at least two different sizes of yttrium-stabilized zirconia balls. The method facilitates preparation of photocatalysts with high activity.

Abstract: The present invention discloses a method for improving uniformity and alignment accuracy of contact hole array pattern. A dummy mask pattern is added to adjacent to contact hole array mask pattern during a design of an exposure mask to maintain a uniformity of contact hole size and prevent contact hole size error and shift of the contact hole pattern.

Abstract: Disclosed is a heat exchanger including: a plurality of tubes through which refrigerants flow, the tubes being spaced away from one another; and a fin through which the tubes are perpendicularly inserted, and having a fin collar for supporting the inserted tube, a seat for supporting an outer circumference of a lower end of the fin collar, and three or more peak portions and three or more valley portions that are alternately disposed at an area defined between the tubes to cause air flow to vary at an area defined between the fin collar, heights of at least two peak portions or depths of at least two valley portions being different from each other.

Abstract: A stacked chip package includes a substrate having an upper surface and a lower surface, a first semiconductor chip having an upper surface and a lower surface, wherein the lower surface of the first semiconductor chip is attached to the upper surface of the substrate and the upper surface of the first semiconductor chip includes a plurality of first electrode pads, and a second semiconductor chip having an upper surface and a lower surface. The lower surface of the second semiconductor chip is attached to the upper surface of the first semiconductor chip, and the lower surface of the second semiconductor chip includes trenches that correspond to the locations of the first electrode pads on the upper surface of the first semiconductor chip.

Abstract: Disclosed is a heat exchanger including a plurality of tubes through which refrigerants flow, the tubes being spaced away from each other, and a plurality of fins spaced away from each other at a predetermined distance. Each of the fins has fin collars through which the tubes are perpendicularly inserted, seat portions each concentrically formed around outer circumferences of the fin collars and provided with laterally-opened front and rear portions, more than two peak portions, and more than two valley portions, the peak and valley portions being alternately disposed to provide airflow variation.

Abstract: A method of partially oxidizing an alcohol to an aldehyde or ketone comprises contacting a gas containing the alcohol with a solid catalyst containing molybdenum, preferably in a +6 oxidation state, and having a surface area of 10 m2/g or higher, preferably 100 m2/g or higher. The molybdenum is supported on a high surface area carrier. The alcohol is a primary or secondary alcohol and preferably contains from 1 to 6 carbon atoms. In a preferred embodiment, the alcohol is ethanol. NOx emissions from an internal combustion engine can be lowered by combining the product of partial oxidation with the exhaust stream before passing the exhaust mixture through a lean NOx catalyst.