Abstract: The present invention relates to a water treatment device, and more specifically to a water purifier capable of removing scale in a simple manner.

Abstract: Provided is a reflector/scatterer arranged around a side lobe beam which is generated from a transmission antenna, in a radiation direction of the side lobe beam, for use in expanding a communication service coverage area.

Abstract: Silicon oxide-based negative electrode active materials and negative electrodes for a secondary battery are disclosed. In an embodiment, a negative electrode active material for a secondary battery includes a silicon oxide particle including a metal silicate; and a hydrocarbon coating layer on the silicon oxide particle, wherein a peak Pa in a Fourier transform infrared (FT-IR) spectral analysis of the negative electrode active material is detected in a range from 2880 cm?1 to 2950 cm?1 and a peak Pb in a FT-IR spectral analysis of the negative electrode active material is detected in a range from 2800 cm?1 to 2865 cm?1.

Abstract: A radio frequency (RF) weak magnetic field detection sensor includes a ferromagnetic core, a pickup coil disposed to surround the ferromagnetic core, a substrate that includes an opening, a core pad connected to the ferromagnetic core and a coil pad connected to the pickup coil, and an insulating tube interposed between the ferromagnetic core and the pickup coil. The insulating tube includes a bobbin around which the pickup coil is wound, and a core hole formed to pass through the bobbin and configured to accommodate the ferromagnetic core.

Abstract: The present invention provides an unloading valve assembly that configures a compression area divided for each control input and opens a valve seat by a pressurizing rod of a piston that performs pressurization by a control input, thereby quickly and accurately exhausting compressed air through the unloading valve assembly and improving durability when closing the valve.

Abstract: The present invention provides an unloading valve assembly that configures a compression area divided for each control input and opens a valve seat by a pressurizing rod of a piston that performs pressurization by a control input, thereby quickly and accurately exhausting compressed air through the unloading valve assembly and improving durability when closing the valve.

Abstract: An apparatus and method for transmitting and receiving magnetic field signals in a magnetic field communication system are provided. The apparatus includes a controller configured to generate a communication signal, matching units that are configured to receive the communication signal and that respectively correspond to different matching frequencies, and loop antennas that are connected to the matching units, respectively, and that are configured to convert communication signals according to the different matching frequencies into magnetic transmission signals in the form of magnetic field energy and to transmit the magnetic transmission signals.

Abstract: Disclosed are a message service provision method for providing a message service via an open chat room corresponding to link information, and a message server and a terminal for executing the message service provision method. The message service provision method comprises the steps of: transmitting, to a message server, a request for issuing link information for an open chat room via a message application; receiving, from the message server, link information generated in response to the request for issuing link information; sharing the link information according to a request for sharing inputted by a user of a host terminal; and performing chatting with a user of a guest terminal participating in the open chat room by means of the shared link information; wherein the user of the guest terminal and the user of the host terminal are users who subscribed to a message service provided via the message server.

Abstract: Disclosed are a message service provision method for providing a message service via an open chat room corresponding to link information, and a message server and a terminal for executing the message service provision method. The message service provision method comprises the steps of: transmitting, to a message server, a request for issuing link information for an open chat room via a message application; receiving, from the message server, link information generated in response to the request for issuing link information; sharing the link information according to a request for sharing inputted by a user of a host terminal; and performing chatting with a user of a guest terminal participating in the open chat room by means of the shared link information; wherein the user of the guest terminal and the user of the host terminal are users who subscribed to a message service provided via the message server.

Abstract: Disclosed are a message service provision method for providing a message service via an open chat room corresponding to link information, and a message server and a terminal for executing the message service provision method. The message service provision method comprises the steps of: transmitting, to a message server, a request for issuing link information for an open chat room via a message application; receiving, from the message server, link information generated in response to the request for issuing link information; sharing the link information according to a request for sharing inputted by a user of a host terminal; and performing chatting with a user of a guest terminal participating in the open chat room by means of the shared link information; wherein the user of the guest terminal and the user of the host terminal are users who subscribed to a message service provided via the message server.

Abstract: Disclosed are a message service provision method for providing a message service via an open chat room corresponding to link information, and a message server and a terminal for executing the message service provision method. The message service provision method comprises the steps of: transmitting, to a message server, a request for issuing link information for an open chat room via a message application; receiving, from the message server, link information generated in response to the request for issuing link information; sharing the link information according to a request for sharing inputted by a user of a host terminal; and performing chatting with a user of a guest terminal participating in the open chat room by means of the shared link information; wherein the user of the guest terminal and the user of the host terminal are users who subscribed to a message service provided via the message server.

Abstract: A social network service, which can visualize and express a user's emotions or opinions and can randomly arrange or permanently delete the content of conversations exchanged between the user and counterparts includes: receiving a chat room creation request from at least one user equipment; transmitting information on a user equipment that has transmitted a chat room participation request, among at least one other user equipment located within a predetermined distance from the user equipment that has transmitted the chat room creation request, to the user equipment that has transmitted the chat room creation request; and creating a chat room for allowing the user equipment that has transmitted the chat room creation request and at least one other user equipment that has transmitted a chat room participation request to perform messaging communication.

Abstract: Provided is a semi-cylindrical osteotomy device including: a guide portion where a tibia accommodating space in which a tibia is accommodated is formed; a cutter portion moving in the tibia accommodating space and cutting the tibia while moving along an inner circumferential surface of the guide portion; and a driving unit driving the cutter portion. According to the semi-cylindrical osteotomy device, stability of a surgery is increased by inserting the guide portion by approaching a side surface of the tibia to minimize an exposed portion of a bone. Also, a wire saw moves along a slit of the guide portion, and thus a cut bone surface of a semi-cylindrical shape is easily and quickly formed.

Abstract: Provided is a semi-cylindrical osteotomy device including: a guide portion where a tibia accommodating space in which a tibia is accommodated is formed; a cutter portion moving in the tibia accommodating space and cutting the tibia while moving along an inner circumferential surface of the guide portion; and a driving unit driving the cutter portion. According to the semi-cylindrical osteotomy device, stability of a surgery is increased by inserting the guide portion by approaching a side surface of the tibia to minimize an exposed portion of a bone. Also, a wire saw moves along a slit of the guide portion, and thus a cut bone surface of a semi-cylindrical shape is easily and quickly formed.

Abstract: A social network service, which can visualize and express a user's emotions or opinions and can randomly arrange or permanently delete the content of conversations exchanged between the user and counterparts includes: receiving a chat room creation request from at least one user equipment; transmitting information on a user equipment that has transmitted a chat room participation request, among at least one other user equipment located within a predetermined distance from the user equipment that has transmitted the chat room creation request, to the user equipment that has transmitted the chat room creation request; and creating a chat room for allowing the user equipment that has transmitted the chat room creation request and at least one other user equipment that has transmitted a chat room participation request to perform messaging communication.

Abstract: Disclosed are a message service provision method for providing a message service via an open chat room corresponding to link information, and a message server and a terminal for executing the message service provision method. The message service provision method comprises the steps of: transmitting, to a message server, a request for issuing link information for an open chat room via a message application; receiving, from the message server, link information generated in response to the request for issuing link information; sharing the link information according to a request for sharing inputted by a user of a host terminal; and performing chatting with a user of a guest terminal participating in the open chat room by means of the shared link information; wherein the user of the guest terminal and the user of the host terminal are users who subscribed to a message service provided via the message server.

Abstract: A social network service, which can visualize and express a user's emotions or opinions and can randomly arrange or permanently delete the content of conversations exchanged between the user and counterparts includes: receiving a chat room creation request from at least one user equipment; transmitting information on a user equipment that has transmitted a chat room participation request, among at least one other user equipment located within a predetermined distance from the user equipment that has transmitted the chat room creation request, to the user equipment that has transmitted the chat room creation request; and creating a chat room for allowing the user equipment that has transmitted the chat room creation request and at least one other user equipment that has transmitted a chat room participation request to perform messaging communication.

Abstract: A mobile communication terminal having two distinct intennas for selectively using the two distinct intennas according to a state of a folder is disclosed. The mobile communication terminal includes: a radio frequency (RF) switching unit for determining whether a folder of the mobile communication terminal is opened or closed; a first intenna used when the RF switching unit determines that the folder is closed; and a second intenna used when the RF switching unit determines that the folder is opened.

Abstract: A mobile communication terminal having two distinct intennas for selectively using the two distinct intennas according to a state of a folder is disclosed. The mobile communication terminal includes: a radio frequency (RF) switching unit for determining whether a folder of the mobile communication terminal is opened or closed; a first intenna used when the RF switching unit determines that the folder is closed; and a second intenna used when the RF switching unit determines that the folder is opened.