Abstract: There is provided a wireless communication apparatus including a base station information input portion to input base station information of a base station transmitting a radio wave having a wave reaching range including a particular location, the base station information acquired from a first memory storing a plurality of pieces of base station information containing a base station ID, a recording portion to record the base station information input to the base station information input portion into a second memory placed in the wireless communication apparatus, a reception portion to receive the radio wave transmitted from a surrounding base station, and a notification processing portion to perform prescribed notification processing based on a determination result whether the wireless communication apparatus exists in the particular location.

Abstract: A decoding device for decoding an LDPC (Low Density Parity Check) code. The decoding device may include a first operation unit for performing a check node operation for decoding the LDPC code, the operation including an operation of a nonlinear function and an operation of an inverse function of the nonlinear function; and a second operation unit for performing a variable node operation for decoding the LDPC code. The first operation unit includes a first converting unit for converting a first quantization value assigned to a numerical value into a second quantization value representing a numerical value with a higher precision than the first quantization value, and a second converting unit for converting the second quantization value into the first quantization value.

Abstract: A method of optimizing a process of selective epitaxial growth sets a guideline for the reaction temperature, pressure, and gas ratio and calculates a non-equilibrium factor (NEF=[exp(l−(A/B))×C−D]×F×(1/S)) depending on the characteristic of the equipment and the types of source gases by controlling a super-saturation ratio depending on a basic thermodynamic law. The selective epitaxial growth by CVD is a deposition method by which a reactive product by thermal activation of a reactive gas is obtained in the shape of a thin film. Therefore, it can successfully form the selective epitaxial growth through control of the super-saturation ratio so that the selective epitaxial growth can be optimized. Also, the method can optimize the process by monitoring the quality of the thin film such as selectivity securing control of deposition speed, facet, reduction in deflects, etch depending on the pattern material.

Abstract: A waterproof connector includes: a connector housing formed with a plurality of terminal housing chambers and further formed with a plurality of rubber tap housing concave sections which are formed in positions facing the terminal housing chambers; and rubber taps to be pressedly inserted respectively into the plural rubber tap housing concave sections which are formed with electric wire insertion through holes into which the electric wires are inserted. In the construction, when the rubber taps are pressedly inserted respectively into the rubber tap housing concave sections, the electric wire insertion through holes of the rubber taps are blocked up.

Abstract: The connection structure includes a case having an insertion recess, in which a flexible printed circuit board (called FPC hereinafter) is provided, and a connector having a terminal to contact the FPC. The connector is insertable in the recess so that a conductor of the FPC can electrically connect to the terminal. Between the case and the FPC, a hollow frame having a hardness larger than the case is provided. The connector may have a lock arm with a locking protrusion and the hollow frame has a guide channel for receiving the lock arm. The guide channel having a locking portion associated with the locking protrusion. The connector may have a pivoting lever being pivotably supported by an axis provided on an outer surface of the housing, and the terminal has a resilient contact piece extending from the housing. The pivoting lever is able to pivot freely from the resilient contact piece. The pivoting lever has a locking portion at one end thereof and a movement limiting portion at the other end thereof.

Abstract: An optical system for recording or reproducing of information to or from an optical information recording medium, includes: a light source; a coupling lens for converting a diverging light emergent from the light source to a converging light; and an objective lens for further converging the converted converging light and for focusing on an information recording surface of the optical information recording medium. A lateral magnification of the objective lens in which a wavefront aberration within a Marechal criterion is minimum, satisfies the following conditional expression,O<M<1where M represents the lateral magnification of the objective lens.

Abstract: A semiconductor light emitting device has a double heterostructure. The device is composed of an active layer and clad layers that sandwich the active layer. At least one of the clad layers has a multilayer structure having at least two element layers. The Al mole fraction of an element layer, which is proximal to the active layer, of the multilayer structure is smaller than that of the other element layer thereof distal from the active layer. This arrangement improves the crystal quality of an interface between the active layer and the clad layer of multilayer structure and effectively confines carriers in the active layer.