Abstract:
The present invention relates to a lazy bulk insertion method for moving object indexing, which utilizes a hash-based data structure to overcome the disadvantages of an R-tree, and uses two buffers to simultaneously store operations in the buffers and process queries stored in the buffers, so that the overall update cost can be reduced. In the lazy bulk insertion method, a buffer is substituted and a state of the buffer is changed to a deactivated state if an input query cannot be stored in the buffer. Operations stored in the deactivated buffer are sequentially analyzed, information about objects corresponding to respective operations is obtained from a direct link to analyze the operations, and thus the operations are aligned on the basis of object IDs. Operations, aligned in ascending order of spatial objects, are identified depending on respective objects, effectiveness of the operations is determined, and thus the operations are realigned on the basis of terminal node IDs. The number of insert operations and the number of delete operations are counted for each terminal node, and variation in the number of empty spaces in the terminal node is obtained, thus splitting and merging of the terminal nodes is predicted. A processing sequence of queries is reorganized so as to reduce variation in the node on the basis of the predicted information.
Abstract:
The present disclosure relates to a probe card carrier. The probe card carrier of the present disclosure may include: a lower case; an upper case configured to cover the lower case; a seating module disposed in the lower case to allow a probe card to be seated thereon; and a card buffer portion installed in the seating module to elastically support a bottom surface and a circumference of the probe card.
Abstract:
The present invention relates to an intelligent power-saving LED light, which can maintain constant brightness and save energy by reducing the number of lighted LEDs of LED modules as outside temperature of a lighting device, such as a street light, having a plurality of LED modules gets lower. When potential of a specific point of a temperature change sensing unit gets lower by a thermistor, comparators compare sensed potential with set reference potential and supply actuation signals of switching elements in consecutive order so that specific LEDs are turned off in consecutive order.
Abstract:
A wireless communication apparatus for starting an operation according to an electric wave received from a portable terminal is provided. The apparatus includes a wireless communication module for transmitting data to the portable terminal, an RFID tag for turning-on a switch using the electric wave received from the portable terminal, the switch supplying power of a battery to a sensor, the wireless communication module and a control unit when the switch is turned-on, and for cutting-off the power supply of the battery to the sensor, the wireless communication module and the control unit when the switch is turned-off, and the control unit for driving the sensor when the power from the battery is supplied to the control unit, for controlling the wireless communication module to transmit a physical amount from the sensor to the portable terminal and for turning off the switch when the control unit receives the physical amount.
Abstract:
There is provided a transformer improved in leakage inductance including: a core having first, second and third legs electromagnetically coupled to one another; a primary winding formed of a conductor having one end and another end receiving power from the outside and dividedly wound around the first, second and third legs; and a secondary winding wound around at least one of the first, second and third legs and receiving induced power by electromagnetic induction with the primary winding.
Abstract:
Provided is an apparatus for computing a T-function based Stream Cipher (TSC)-4 stream cipher. The apparatus includes: two T-function units; and a nonlinear filter for receiving bits output from the two T-function units and generating an 8-bit output sequence per clock. Each of the T-function units includes: a first register for storing an internal state value of the lower N bits; an N-bit internal state updater for updating the internal state value of the lower N-bits stored in the first register; an intermediate result register for storing an intermediate result value output from the N-bit internal state updater; a second register for storing an internal state value of the upper M bits; and an M-bit internal state updater for updating the internal state value of the upper M bits stored in the second register using the value stored in the intermediate result register.
Abstract:
Disclosed herein is a method of designing a query classificaton component for a multilevel DataBase Management System (DBMS). The method includes determining whether a plan tree, which is used for query processing, is input; if the plan tree is input, designing the query classification component to output locations for respective tables, at which data must be referenced in conjunction with the plan tree, and corresponding predicates; and transferring the locations for respective tables and the corresponding predicates to respective storage managers and causing each of the storage managers to process corresponding data.