Abstract:
The present invention relates to a method for producing a photonic crystal device having a photonic crystal structure which can be used in photonic crystal devices such as optical waveguides, resonators, filters, antennas and Smith-Purcell free electron lasers which can be employed in a desired electromagnetic waveband by application of semiconductor processing technology and of an anisotropic wet process which uses the crystallization direction (100) of a silicon wafer; for producing a photonic crystal device which comprises a photonic crystal part having a periodic array of silicon crystals having a predetermined form and a covering part for reducing optical losses in the axial direction to be used as an optical waveguide or a resonator, thereby to be capable of being applied in a desired electromagnetic band; and which can have the conductive photonic-crystal characteristics by not coating the silicon crystal with an electrically conductive material and the metal photonic-crystal characteristics by coating the silicon crystal with an electrically conductive material. This production method makes it possible to mass-produce photonic crystal structures of relatively low cost and substantial height within a short time.
Abstract:
Provided are a remote monitoring method and an apparatus for providing video images for remote monitoring. The remote monitoring method includes (a) automatically transmitting, by a monitoring video providing device, an event occurrence message to a pre-registered video communication terminal when motion of a previously set monitored object is sensed; (b) initiating, by a user of the video communication terminal, a video call directed to the monitoring video providing device in response to the event occurrence message; (c) requesting, by the monitoring video providing device, the video communication terminal connected via the video call to provide a password on a guide message; (d) determining, by the monitoring video providing device, whether the password received from the video communication terminal matches a pre-registered password; and (e) when the passwords match, providing, by the monitoring video providing device, real-time video data for the monitored object to the video communication terminal via the established video call. It is possible to conveniently monitor a specific object from a remote location at low cost without modification of a network structure or addition of complex equipment.
Abstract:
Provided are a remote monitoring method and an apparatus for providing video images for remote monitoring. The remote monitoring method includes (a) automatically transmitting, by a monitoring video providing device, an event occurrence message to a pre-registered video communication terminal when motion of a previously set monitored object is sensed; (b) initiating, by a user of the video communication terminal, a video call directed to the monitoring video providing device in response to the event occurrence message; (c) requesting, by the monitoring video providing device, the video communication terminal connected via the video call to provide a password on a guide message; (d) determining, by the monitoring video providing device, whether the password received from the video communication terminal matches a pre-registered password; and (e) when the passwords match, providing, by the monitoring video providing device, real-time video data for the monitored object to the video communication terminal via the established video call. It is possible to conveniently monitor a specific object from a remote location at low cost without modification of a network structure or addition of complex equipment.
Abstract:
A magnetron has a cylindrical cathode portion, an anode portion surrounding the cathode portion concentrically, and a resonator circuit connected to the anode portion. Fine modifying portions are periodically formed on the anode portion in an azimuthal direction to encourage electrons in bunching, thereby reducing a start-oscillation time and noise signals.
Abstract:
The present invention relates to a photonic crystal diode resonator for modulated electric field emission and electromagnetic wave oscillation; the photonic crystal resonator according to one aspect of the present invention comprises a structure wherein a plurality of dielectric rods including point defects and line defects are combined between a first metal substrate and a second metal substrate, and an electron emission source (cold anode) of a certain size is formed on said point defect location of said first metal plate.
Abstract:
The present invention relates to a resonator structure in which an alternating current (AC) voltage is additionally applied between two metallic surfaces where a constant direct current (DC) voltage is applied to allow either of the two metallic surfaces to generate a pulse electron beam in a stable manner through an electron amplification caused by a secondary electron. The present invention also relates to a photonic crystal resonator in which a direct current (DC) voltage, a pulse signal, or the like are additionally applied via an external power source to the 2-dimensional photonic crystal resonator where electromagnetic waves are coupled to generate a pulse electron beam through a secondary electron amplification, thereby forming deflected electromagnetic waves (AC signals) of several GHz frequency or higher between two metal plates constituting the resonator.
Abstract:
The present invention relates to a solid cosmetic composition includes an organic sunscreen, an inorganic sunscreen, wax, a non-ion surfactant, oil, silicon polymer, and a pigment for a sunscreen, in which the solid cosmetic composition is highly water-resistant to thereby prevent a reduction in a UV protection effect by sweat or water, is comfortable to wear and has long-wearing characteristics, and can be repeatedly used even after application of make-up.