Abstract:
Prosthetic intervertebral discs and methods for using the same are described. The subject prosthetic discs include upper and lower endplates separated by a compressible core member. The prosthetic discs described herein include one-piece, two-piece, three-piece, and four-piece structures. The subject prosthetic discs exhibit stiffness in the vertical direction, torsional stiffness, bending stiffness in the saggital plane, and bending stiffness in the front plane, where the degree of these features can be controlled independently by adjusting the components of the discs. The interface mechanism between the endplates and the core members of several embodiments of the described prosthetic discs enables a very easy surgical operation for implantation.
Abstract:
The present invention provides a bleach activator which is at least one macrocyclic manganese complex selected from the group consisting of [MnIII(rac-14-decane)X2]Y, [MnIII(mes-14-decane)X2]Y.H2O and [MnIII(mes-14-decane)X2]Y represented by Formulas 1-3, as well as a preparation method thereof. Also, the invention provides a bleaching composition and bleaching detergent composition comprising the bleach activator. The bleach activator comprising the manganese complex is used in a granulated form. wherein X is at least one selected from chlorine (—Cl) and acetate (—OOCCH3), and Y is an anion selected from Cl−, Br−, F−, NO3−, ClO4−, OH−, NCS−, N3−, and PF6−.
Abstract:
Provided is an optical connection apparatus for a parallel optical interconnect module and a parallel optical interconnect module using the same for reducing a coupling loss generated due to an alignment error when coupled with an optical fiber, comprising: a 2D reflector in a prism shape and having at least two rows of cylinder type lens attached thereto; a 2D optical waveguide having at least two layers of core arrays; at least two rows of 2D optical benches; and a 2D ferrule capable of loading at least two layers of optical fibers so as to facilitate the fixing of the 2D optical waveguide for optical interconnection.
Abstract:
A water leakage detecting device for effectively detecting water leakage and sensing malfunctions in the device is disclosed. The device includes a base retaining water leaked from a tub, a detector detecting whether leaked water is retained in the base, a first signal generator outputting a signal, when the detector detects the leaked water, a second signal generator outputting a signal, when the detector does not detect the leaked water, and a controller deciding whether to drain the leaked water and determining whether the water leakage detecting device has a malfunction.
Abstract:
A circuit for testing a semiconductor memory device comprises a latency controller for controlling the latency of the external clock signal, an internal column address generator for generating a column address signal in the memory device, and a mode register for generating a mode signal. The circuit for testing semiconductor memory devices also includes a column address decoder for decoding the output address signal of the internal column address generator, a memory cell for reading or writing data, an input/output control unit for controlling the data input/output of the memory cell according to the output signal of the latency controller, a data input buffer, and a data output buffer. Further provided are a frequency multiplier for generating an internal clock signal having a frequency "n" times the frequency of the external clock signal. By providing the above-mentioned improvements, the conventional test equipment can be used to test high frequency memory devices.
Abstract:
A burn-in test circuit of a semiconductor memory device with a first test circuit having output terminals connected to input terminals of a first half of plurality of word line drivers. A second test circuit has output terminals connected to input terminals of a second half of the plurality of word line drivers. The first and second tests circuits are sequentially activated to perform a burn-in test for all the memory cells.
Abstract:
The time required for testing high-density semiconductor memory devices is reduced by circuits and methodology for rapidly writing test data bits into the memory array. A common word line enable signal is arranged to turn on all of the word lines in the array simultaneously. Test data bits are applied to the array by gating them onto the I/O lines so that separate test bit lines are not required. A fast test enable signal gates the test bits onto the I/O lines in all columns of the array simultaneously, so that all of the memory cells receive test bits at one time. The new circuitry has the further advantages of reduced area and capacitance, the latter further contributing to reducing the test data write time.
Abstract:
Disclosed herein are a virtual golf simulation apparatus for providing a user-customized practice environment, a server connected with the virtual golf simulation apparatus through a network, and a user-customized practice environment provision method using the virtual golf simulation, which are capable of providing various practice modes for each golf shot so that a user can practice a specific golf shot intensively using golf simulation based on virtual reality to realize a virtual environment that cannot be experienced on a real golf driving range so that the user can intensively practice a golf shot which is more exciting, more intensive, and more practically useful in a real game.
Abstract:
The present invention relates to a system and method for managing resources, which involve managing a plurality of frequency resources in a communication system including a plurality of systems not having rights to use a first frequency band. The system and method of the present invention involve: defining, upon the detection of a frequency band available to the plurality of systems from the first frequency band, an interface between objects in the available frequency band so as to enable coexistence and frequency-sharing among the plurality of systems in the available frequency band; defining a primitive of a service access point (SAP) which supports the transceiving of information belonging to the plurality of systems between the objects through the interface; enabling the objects to transceive information belonging to the plurality of systems through the interface using the primitive of the service access point; and enabling the plurality of systems to coexist and share a frequency in the available frequency band to use the available frequency band by transceiving the information belonging to the plurality of systems.
Abstract:
The invention comprises an improved floor covering product. The floor covering product comprises a floor covering material having a face surface and a back surface. On the back surface of the floor covering material is a layer of polyurethane having a cure index of between approximately 70 and 90. A method of using the floor covering product is also disclosed.