Abstract: An evaporator for a fuel cell system generating steam used for a steam reforming reaction provides an evaporator including a body having an inner space formed by a hollow for allowing a flow of a fluid, and a plurality of cell barrier members dividing the inner space into a plurality of spaces and having heat conductivity. The spaces include at least one first space for allowing a flow of a flue gas and at least one second space for allowing a flow of water.

Abstract: A hydrogen generator includes a water storage container for storing water, a reaction container for receiving a solid fuel that is a mixture of a complex metal hydride and catalysts, and a water supplying source that is connected between the water storage container and the reaction container to supply the water to the reaction container.

Abstract: System and method for validating a circuit for simulation are disclosed. The system includes at least one processing unit for executing computer programs, a graphical user interface for viewing representations of the circuit on a display, a memory for storing information of the circuit, and logic for representing the circuit in a hierarchical data structure, where the hierarchical data structure has a plurality of subcircuits arranged in a connected graph, and where each subcircuit has circuit elements and one or more input and output ports. The system further includes logic for traversing the hierarchical data structure in a bottom-up fashion, logic for recording input port to output port (port-to-port) properties of the subcircuits in the hierarchical data structure, logic for traversing the hierarchical data structure in a top-down fashion, and logic for identifying illegal port paths using the port-to-port properties of the subcircuits.

Abstract: A fuel cell system possessing a mixing tank for recovering an unreacted fuel, the mixing tank being capable of effectively condensing a stack emission product without increasing its volume. The mixing tank includes a fuel supply port for supplying a concentrated fuel; a fluid inlet port for supplying a fluid discharged from an external fuel cell stack; a chamber for mixing the concentrated fuel with the fluid discharged from the fuel cell stack; a stack supply port for supplying a mixed fuel in the chamber to the fuel cell stack; and a chamber cooling member for cooling the chamber.

Abstract: A computer implemented method is provided for use in evaluating a hierarchical representation of a circuit design encoded in a computer readable medium comprising: traversing a circuit path within a higher level circuit that includes a reference potential connection, to identify a port of a call to a first lower level circuit that is DC path connected to the reference potential; identifying a first DC port group that includes each port of the call to the first lower level circuit that is DC path connected to the identified port of the call to the first lower level circuit; automatically marking as DC path connected to the reference potential, each port of the call to the first lower level circuit that is a member of the first DC port group; and traversing a circuit path within the first lower level circuit to identify a circuit path within the first lower level circuit that is DC path connected to a marked port of the first lower level circuit.

Abstract: A system for communicating simulation solutions between circuit components in a hierarchical data structure includes a simulator module having one or more computer programs for representing the circuit as a hierarchically arranged set of branches, which includes a root branch and a plurality of other branches logically organized in a graph. The hierarchically arranged set of branches includes a first branch that contains one or more driver leaf circuits and a second branch that also contains one or more receiver leaf circuits, where the first branch and second branch are interconnected in the graph through a third branch at a higher hierarchical level in the graph than the first and second branches.

Abstract: Disclosed is a catalyst for a partial oxidation reforming reaction of fuel in the form of disk having through-hole. In addition, according to the invention, there is provided a fuel reforming apparatus and method using the catalyst. The catalyst for a partial oxidation reforming reaction of fuel according to the invention makes it possible to progress the partial oxidation reforming reaction of fuel smoothly, to improve the efficiency when reforming the fuel and to simplify the fuel reforming reactor. According to the fuel reforming apparatus and method, since the heat of reaction is efficiently controlled and used, a simple on-off operation, reduction of starting time and a stable operational condition are accomplished, which are indispensably required for a fuel reforming system in fuel cells, such as household, portable and car fuel cells.

Abstract: A system for dynamically compressing circuit components during simulating of a circuit having a hierarchical data structure includes a simulator module having one or more computer programs for 1) selecting a group of leaf circuits from the first and second branches for simulation, 2) if two or more leaf circuits of the circuit having a substantially same isomorphic behavior, representing the two or more leaf circuits as a merged leaf circuit, 3) creating a first port connectivity interface dynamically for the group of leaf circuits in response to the merged leaf circuit, where the first port connectivity interface communicates changes in signal conditions among the group of leaf circuits, and 4) simulating the group of leaf circuits in accordance with the first port connectivity interface.

Abstract: Disclosed is a catalyst for a partial oxidation reforming reaction of fuel in the form of disk having through-hole. In addition, according to the invention, there is provided a fuel reforming apparatus and method using the catalyst. The catalyst for a partial oxidation reforming reaction of fuel according to the invention makes it possible to progress the partial oxidation reforming reaction of fuel smoothly, to improve the efficiency when reforming the fuel and to simplify the fuel reforming reactor. According to the fuel reforming apparatus and method, since the heat of reaction is efficiently controlled and used, a simple on-off operation, reduction of starting time and a stable operational condition are accomplished, which are indispensably required for a fuel reforming system in fuel cells, such as household, portable and car fuel cells.

Abstract: A system for supporting multi-rate simulation of a circuit having a hierarchical data structure includes a simulator module having one or more computer programs for 1) partitioning the circuit into a plurality of group circuits, each group circuit includes one or more leaf circuits, where each leaf circuit produces a predictable set of output signals with a given set of input signals, 2) storing the group circuits in a scheduled event queue in accordance with priority in time which the group circuits need to be simulated, 3) retrieving from the scheduled event queue a set of group circuits for simulation within a predetermined time period, 4) distributing the set of group circuits into a set of predefined event lists, where each of the predefined event list stores one or more group circuits of a corresponding event type, and 5) simulating the one or more group circuits in each of the predefined event list in accordance with a rate of change of signal conditions of each individual group circuit.

Abstract: A method of transforming a first topology to a reduced topology is disclosed. One preferred embodiment of the present invention includes a method of transforming a circuit from a first topology to a reduced topology, said first topology comprising a plurality of inter-connected circuit elements. The method comprises the steps of: (a) identifying one or more circuit elements; (b) analyzing the effect of reducing one or more of said identified circuit elements on the topological and physical characteristics of said circuit; and (c) if the effect satisfies a first standard, generating a second topology reflecting the reduction of one or more identified circuit elements.

Abstract: Disclosed are a Viterbi decoding method and apparatus for high speed data transmissions. Branch metric is used with data inputted from a Viterbi decoder used in a communication system, and, when current state metric is used for addition, comparison, and selection, the selection operation is performed after simultaneous addition and comparison operations are performed, so that a faster decoding processing speed is obtained. The decoding process is carried out at a high speed with the addition and comparison operations carried out simultaneously, thereby preventing the increase of power consumption.

Abstract: A catalyst for reforming a fuel and a fuel cell system including the same is provided. The catalyst for reforming a fuel includes at least one active metal selected from the group consisting of titanium (Ti), iron (Fe), chromium (Cr), nickel (Ni), cobalt (Co), vanadium (V), tungsten (W), molybdenum (Mo), manganese (Mn), tin (Sn), ruthenium (Ru), aluminum (Al), platinum (Pt), silver (Au), palladium (Pd), copper (Cu), rhodium (Rh), zinc (Zn), and mixtures thereof, supported on a metal foam, and a fuel cell system in which butane is used as a fuel, also including the same catalyst composition as a reforming catalyst for use in a reformer.

Abstract: Disclosed is a catalyst for a partial oxidation reforming reaction of fuel in the form of disk having through-hole. In addition, according to the invention, there is provided a fuel reforming apparatus and method using the catalyst. The catalyst for a partial oxidation reforming reaction of fuel according to the invention makes it possible to progress the partial oxidation reforming reaction of fuel smoothly, to improve the efficiency when reforming the fuel and to simplify the fuel reforming reactor. According to the fuel reforming apparatus and method, since the heat of reaction is efficiently controlled and used, a simple on-off operation, reduction of starting time and a stable operational condition are accomplished, which are indispensably required for a fuel reforming system in fuel cells, such as household, portable and car fuel cells.

Abstract: The present invention relates to a plasma display apparatus comprising a panel; one or more drivers applying a driving voltage to a plurality of electrodes formed in the panel; and a control board supplying a control signal to the one or more drivers, wherein the control board includes an image signal processor which performs the digital conversion of a analog image signal inputted from the outside and a decoding. As at least one of the image signal processor which performs a decoding is integrated, the signal lines connected to the control board can be simply implemented such that the assembly production efficiency increases as well as the noise reduction in the signal transmission.

Abstract: System and method for validating a circuit for simulation are disclosed. The system includes at least one processing unit for executing computer programs, a graphical user interface for viewing representations of the circuit on a display, a memory for storing information of the circuit, and logic for representing the circuit in a hierarchical data structure, where the hierarchical data structure has a plurality of subcircuits arranged in a connected graph, and where each subcircuit has circuit elements and one or more input and output ports. The system further includes logic for traversing the hierarchical data structure in a bottom-up fashion, logic for recording input port to output port (port-to-port) properties of the subcircuits in the hierarchical data structure, logic for traversing the hierarchical data structure in a top-down fashion, and logic for identifying illegal port paths using the port-to-port properties of the subcircuits.

Abstract: A system for simulating a circuit having hierarchical data structure includes a simulator module having one or more computer programs for 1) creating a static database in accordance with a netlist description of the circuit, where the static database contains topology information of the circuit; 2) selecting a group circuit for simulation, where the group circuit contains one or more leaf circuits selected from the first branch and the second branch; 3) creating a dynamic database for representing the group circuit, where the dynamic database includes references to the static database for fetching topology information dynamically during simulation; and 4) simulating the group circuit in accordance with the dynamic database. Since the system duplicates and reproduces only the relevant dynamic information when necessary, the disclosed circuit simulator uses less memory and produces better performance.

Abstract: A fuel cell reformer includes a main body having a first pipe with a second pipe inside the first pipe, a thermal source unit in the second pipe, a reforming reaction unit in a first region between the first pipe and the second pipe to generate a reforming gas containing hydrogen through a reforming reaction of a fuel, and a carbon monoxide reduction unit in a region other than the first region between the first pipe and the second pipe to reduce a concentration of carbon monoxide contained in the reforming gas. A thermal treatment unit in the main body supplies thermal energy to the reforming reaction unit and the carbon monoxide reduction unit at a time of initial driving of the reformer such that the supplied thermal energy corresponds to a unique operational temperature range in the reforming reaction unit, and to a unique operational temperature range in the carbon monoxide reduction unit.

Abstract: A reformer includes a first body, a second body which is disposed in an inner portion of the first body, a heat source unit which is disposed in an inner portion of the second body to generate heat, a reforming reaction unit which includes a reforming catalyst placed in a space between first and second bodies to generate a hydrogen-rich gas from the fuel through a reforming reaction using the reforming catalyst, and a nozzle member which is disposed in the second body to distribute the fuel and the oxygen to the heat source unit.

Abstract: In a plate type reformer and a fuel cell system including the plate type reformer, the plate type reformer includes: a plate type combustion reactor including a distributing plate having a distributing chamber with a plurality of distributing holes adapted to supply an oxidizing agent, and a combustion plate having a combustion chamber with an oxidizing catalyst layer adapted to generate heat energy in response to the oxidizing agent supplied through the distributing holes of the distributing plate reacting with fuel; a plate type preheater including a channel adapted to introduce a mixed fuel of fuel and water is introduced, the plate type preheater adapted to preheat the mixed fuel with the heat energy generated in the plate type combustion reactor; and a plate type reforming reactor with a reforming catalyst layer adapted to generate hydrogen gas from the mixed fuel preheated by the plate type preheater, the plate type reforming reactor effecting a reforming reaction using the heat energy of the plate type