Abstract: Disclosed in the present invention is a floating hologram system. The floating hologram system includes a diffuser configured to form a projection image using light beams transmitted from an image transmitter and diffuse the formed image, and a holographic optical element on which the image diffused from the diffuser is incident and which generates a virtual image floating at a position a predetermined distance therefrom and has a convex lens characteristic. A distance between the diffuser and the holographic optical element is determined based on a focal length of the holographic optical element and a distance from the holographic optical element to the virtual image.

Abstract: A disclosed flat type lamp for a photoionization detector includes: a first plate member having a plate shape and having a first surface on which a plurality of discharge cavities is formed; a second plate member isolating the plurality of discharge cavities from the outside by being disposed and sealed on the first surface of the first plate member; electrodes disposed on the first and second plate members and arranged to face each other; and a discharge gas filled in the plurality of discharge cavities and producing vacuum ultraviolet using electric force that is applied through the electrodes.

Abstract: A disclosed flat type lamp for a photoionization detector includes: a first plate member having a plate shape and having a first surface on which a plurality of discharge cavities is formed; a second plate member isolating the plurality of discharge cavities from the outside by being disposed and sealed on the first surface of the first plate member; electrodes disposed on the first and second plate members and arranged to face each other; and a discharge gas filled in the plurality of discharge cavities and producing vacuum ultraviolet using electric force that is applied through the electrodes.

Abstract: A gas sensor, a refrigerator having the gas sensor, and a method for controlling the gas sensor recognizes the ripening degree of a target food on the basis of a variation in color using a pH indicator having a color that is changed with pH variation generated when the pH indicator reacts with target gas, a refrigerator having the gas sensor. The gas sensor for detecting target gas includes: a base provided for gas permeation; and a detection unit provided at the base, and is discolored in response to pH variation generated when reacting with target gas having permeated the base.

Abstract: An electronic nose apparatus is capable of replacing the olfactory sense of human. An apparatus and method for judging sensibility of a smell form olfactory characteristics of smells as data and judge the type and intensity of the smell based on the data. Particularly, a smell pattern is implemented as a database, and the sensibility of the smell of unknown gas is judged based on the implemented data, thus providing information on the sensibility of the smell. The apparatus and method implement detecting a gas via a sensor apparatus, comparing a detection pattern detected via the sensor apparatus with a smell sensibility pattern on a previously stored database to analyze the detection pattern, determining a most approximate smell sensibility pattern, based on the comparison, and judging smell sensibility of the detection gas based on the determined smell sensibility pattern.

Abstract: A gas sensor, a refrigerator having the gas sensor, and a method for controlling the gas sensor recognizes the ripening degree of a target food on the basis of a variation in color using a pH indicator having a color that is changed with pH variation generated when the pH indicator reacts with target gas, a refrigerator having the gas sensor. The gas sensor for detecting target gas includes: a base provided for gas permeation; and a detection unit provided at the base, and is discolored in response to pH variation generated when reacting with target gas having permeated the base.

Abstract: Provided are mixed ligand metal nanoparticle chemical sensors in which metal nanoparticles are encapsulated by at least two kinds of different molecule ligands having a relatively low conductivity and various composition ratios, and a chemical sensor array in which a film of the metal nanoparticle sensor is formed on the substrate. The metal nanoparticle sensor using the mixed ligand improves sensitivity and reaction speed with respect to an analyte, and selectivity with respect to various analytes, and a kind and a composition of a ligand of the mixed ligand constituting the metal nanoparticle sensor are adjusted to allow the high sensitivity nanoparticle sensor to be applied to the sensor array technology, thereby enabling a design of sensor properties as well as systematic access to a configuration of the sensor array the most efficient for the analytes.

Abstract: Provided is a sensor structure comprising a heater and a temperature sensor at the center of a membrane having a well structure, allowing a temperature to be rapidly controlled with low power, and the object is analyzed using a conductivity change measured at two or more substrate temperatures with a pair of detecting electrode and a detecting layer implemented on the heater, wherein the sensing layer can include a conductive particle and a non-conductive organic composite.

Abstract: Provided are an indoor gas detecting apparatus and an indoor air purification system. The indoor gas detecting apparatus includes: a gas sensor unit composed of a plurality of gas sensors and a fine dust sensor; a controller controlling overall operations; a display unit; an alarm unit; and a communication unit transmitting/receiving data to/from an external apparatus. If a detected gas amount exceeds a predetermined permission level of each gas, the controller transmits an operation signal to an external automatic gas blocking apparatus or an external air purification apparatus so as to operate the automatic gas blocking apparatus or the air purification apparatus. Accordingly, not only fresh indoor air can be maintained but also an explosion or a fire can be prevented.

Abstract: A semiconductor high-voltage device including a semiconductor substrate having a deep trench formed therein, a gate oxide film formed on sidewalls of the deep trench, a polysilicon layer formed in the deep trench and on the gate oxide film, and spacers formed on sidewalls of the trench at a portion of the deep trench above the gate oxide film. Loss of a gate oxide film can be prevented during processing, thereby also preventing a change of a current path, a phenomenon such as current leakage between a top surface of polysilicon and source/drain regions.

Abstract: A semiconductor high-voltage device including a semiconductor substrate having a deep trench formed therein, a gate oxide film formed on sidewalls of the deep trench, a polysilicon layer formed in the deep trench and on the gate oxide film, and spacers formed on sidewalls of the trench at a portion of the deep trench above the gate oxide film. Loss of a gate oxide film can be prevented during processing, thereby also preventing a change of a current path, a phenomenon such as current leakage between a top surface of polysilicon and source/drain regions.

Abstract: An electrochemical gas sensor and a method of manufacturing the same are provided. The electrochemical gas sensor includes: a substrate; an electrode patterned on the substrate; a solid electrolyte layer having proton conductivity formed on the substrate having the patterned electrode; and a hydrophobic microporous membrane formed on the solid electrolyte layer. The gas sensor chip is easily integrated with a driving circuit and uses a solid electrolyte layer, and thus it can be manufactured in a smaller size and in a large area process.

Abstract: A method of additionally displaying link numbers to links on a web page and a video system using the same. The method of displaying link numbers on the web page for an video system which performs any of an image-receiving function, an image-reproducing function, and an image-recording function includes: storing web pages downloaded from an external communication network; checking links on the stored web pages; assigning link numbers to the checked links; and displaying the link numbers to the links when the web pages are displayed. Accordingly, the video system can additionally display the link numbers to the links on the web pages to enable one to select links by inputting numbers through a key input unit such as a remote controller.