Abstract: A hairdryer may be provided, the hairdryer comprising: a main body unit provided with a gas discharge unit through which a gas is discharged to the outside, and a handle unit extending from the main body unit, wherein the gas discharge unit comprises: a module power supply unit which is provided at the center of the gas discharge unit and is in contact with a diffuser coupled to the main body so as to supply electric power to the diffuser; and a coupling unit which is provided in an annular shape along the circumference of the gas discharge unit so as to surround the module power supply unit. The diffuser is coupled to the main body unit via the coupling unit, and the module power supply unit is provided to come into contact with the diffuser while facing the diffuser. As such, a user may easily couple the diffuser to the hairdryer. Also, the hairdryer can supply electric power to the diffuser so that the additional function of the diffuser can be easily carried out.

Abstract: Disclosed are an electrolyte for a lithium secondary battery, and a lithium secondary battery. The electrolyte for a lithium secondary battery includes a lithium salt; an organic solvent; and an additive, wherein the additive includes a compound represented by Formula 1. In Formula 1, R1 to R5 are as defined in the detailed description of the disclosure.

Abstract: An electrolyte for a lithium secondary battery and a lithium secondary battery including the electrolyte are disclosed. The electrolyte may include a lithium salt, an organic solvent, and a compound represented by Formula 1: where, in Formula 1, A is oxygen or sulfur.

Abstract: A method of managing intercell interference in a network and an apparatus for performing the method are disclosed. The method of managing intercell interference by a base station included in the network includes selecting a beam pattern from among a plurality of beam patterns for transmitting and receiving data between the base station and users included in the network, activating a beam corresponding to the selected beam pattern, performing a user’s scheduling on users included in the activated beam, and allocating transmission power to the activated beam to transmit and receive data to and from the users selected by the user’s scheduling.

Abstract: Example embodiments relate to a method of preparing a two-dimensional (2D) transition metal chalcogenide nanostructure, the method including preparing a 2D transition metal chalcogenide nanostructure by a reaction between a transition metal precursor and a chalcogen precursor in a composition including a solvent, wherein the chalcogen precursor is a compound including a first bond connecting two neighboring chalcogen elements and the second bond connecting one of the two neighboring chalcogen elements and a hetero-element adjacent thereto, and binding energy of the second bond is 110% or less of the binding energy of the first bond, a 2D transition metal chalcogenide nanostructure prepared thereby, and a device including the 2D transition metal chalcogenide nanostructure.

Abstract: Example embodiments relate to a method of preparing a two-dimensional (2D) transition metal chalcogenide nanostructure, the method including preparing a 2D transition metal chalcogenide nanostructure by a reaction between a transition metal precursor and a chalcogen precursor in a composition including a solvent, wherein the chalcogen precursor is a compound including a first bond connecting two neighboring chalcogen elements and the second bond connecting one of the two neighboring chalcogen elements and a hetero-element adjacent thereto, and binding energy of the second bond is 110% or less of the binding energy of the first bond, a 2D transition metal chalcogenide nanostructure prepared thereby, and a device including the 2D transition metal chalcogenide nanostructure.

Abstract: In a cellular communication system including a plurality of cells, a resource allocation apparatus of a base station determines a resource division ratio of a present resource frame using a traffic load of a plurality of cells that are measured for an immediately preceding resource frame and marginal utility of each partition, divides a present resource frame into a plurality of partitions according to the determined resource division ratio, and allocates a plurality of partitions to a user.

Abstract: A QoE-aware scheduling method for a wireless network is provided. The scheduling method includes: acquiring application information about a service to be run on a terminal included in the wireless network; creating an MOS model based on the application information; and scheduling wireless network resources for the terminal based on the MOS model.

Abstract: A terminal determines a state of the terminal among an idle state and a connected state. The terminal selects one of a plurality of network scan methods based on a state of the terminal. In addition, the terminal discovers an accessible radio network according to the selected scan method.

Abstract: A method and an apparatus for controlling a femtocell base station which can effectively solve an inter-cell interference problem. A method of controlling a femtocell base station according to an exemplary embodiment includes receiving pilot signals from one or more macro cell base stations located in surroundings of a femtocell and measuring intensities of pilot signals, receiving use frequency information and pilot signal transmission power information from one or more macro cell base stations, determining a position of a femtocell within a reference macro cell according to an intensity of a reference pilot signal having a maximum signal intensity among received pilot signals, determining a use frequency of a femtocell according to a position of a femtocell, and determining a transmission power of a femtocell according to use frequency and an intensity of a reference pilot signal of a femtocell.

Abstract: A dynamic resource allocating apparatus of a first base station managing a first cell in a cellular communication system calculates an interference metric of each user terminal received by each user terminal from a plurality of neighboring cells, calculates a coupling factor between the first base station and each neighboring base station of each neighboring cell by using the interference metric and a load of each user terminal, calculates available cell boundary resources of neighboring cells by using the coupling factor with respect to each neighboring base station, and allocates resources by using the cell boundary resources allocated to the first cell and the available cell boundary resources of the neighboring cells.

Abstract: A method and an apparatus for providing a managed service in a wireless communication system are provided. A base station receives a low-level network access mode or a high-level network access mode from a terminal, and determines a limitation or compensation corresponding to an access mode. Further, the base station provides the managed service to the terminal based on the access mode received from the terminal.

Abstract: A dynamic resource allocating apparatus of a first base station that manages a first cell in a cellular communication system including the first cell and a plurality of cells adjacent to the first cell determines time resource division vector in which one time resource division period is formed of a plurality of time division intervals and calculates time resource division vector for maximizing utilities of user terminals in a set up objective function to update the time resource division vector. Among the plurality of time division intervals, a first time division interval is operated by a time resource reuse coefficient 1 for user terminals positioned in center regions of a first cell and a plurality of adjacent cells, and the remaining time division intervals excluding the first time division interval are operated by a time resource reuse coefficient n for user terminals positioned at edges of the first cell and the plurality of adjacent cells.

Abstract: A resource allocation apparatus of a cellular communication system including a plurality of cells divides an entire frequency band into a first frequency band to allocate to a cell central area and a second frequency band to allocate to a cell boundary area, divides the second frequency band into a plurality of subbands, allocates the first frequency band or the second frequency band to a terminal within each cell, and adjusts adaptively a size of the first frequency band or the second frequency band according to load distribution information of each cell. The plurality of cells use commonly the first frequency band and the second frequency band is operated with a resource pool method.

Abstract: In a cellular communication system including a plurality of cells, a resource allocation apparatus of a base station determines a resource division ratio of a present resource frame using a traffic load of a plurality of cells that are measured for an immediately preceding resource frame and marginal utility of each partition, divides a present resource frame into a plurality of partitions according to the determined resource division ratio, and allocates a plurality of partitions to a user.

Abstract: Disclosed are a multimode terminal that may simultaneously enhance utilization of a device and efficiency of a network by enabling a mobile terminal supporting a plurality of communication schemes to additionally support a relay function, and a method of relaying communication using the multimode terminal. A communication relay method of a multimode terminal according to an exemplary embodiment of the present disclosure includes: searching, by a base station, for terminals that support a plurality of communication schemes; selecting, by the base station from among the searched terminals, a relay terminal that satisfies a predetermined condition for performing a multimode relay function; requesting, by the base station, the relay terminal to perform the multimode relay function; and relaying, by the relay terminal in response to the request of the base station, communication between the base station and a target terminal.

Abstract: A dynamic resource allocating apparatus of a first base station that manages a first cell in a cellular communication system including the first cell and a plurality of cells adjacent to the first cell determines time resource division vector in which one time resource division period is formed of a plurality of time division intervals and calculates time resource division vector for maximizing utilities of user terminals in a set up objective function to update the time resource division vector. Among the plurality of time division intervals, a first time division interval is operated by a time resource reuse coefficient 1 for user terminals positioned in center regions of a first cell and a plurality of adjacent cells, and the remaining time division intervals excluding the first time division interval are operated by a time resource reuse coefficient n for user terminals positioned at edges of the first cell and the plurality of adjacent cells.

Abstract: A dynamic resource allocating apparatus of a first base station managing a first cell in a cellular communication system calculates an interference metric of each user terminal received by each user terminal from a plurality of neighboring cells, calculates a coupling factor between the first base station and each neighboring base station of each neighboring cell by using the interference metric and a load of each user terminal, calculates available cell boundary resources of neighboring cells by using the coupling factor with respect to each neighboring base station, and allocates resources by using the cell boundary resources allocated to the first cell and the available cell boundary resources of the neighboring cells.

Abstract: An apparatus for allocating resources in a cellular communication system including a plurality of cells divides time resources of one period into a plurality of time division intervals, allocates one time division interval of the plurality of time division intervals for user terminals in a cell edge region, and controls at least one of a magnitude of one period and a magnitude of the plurality of time division intervals in accordance with distributions and load distributions of user terminals of the plurality of cells.

Abstract: Disclosed are a method and an apparatus for controlling a femtocell base station which can effectively solve an inter-cell interference problem. A method of controlling a femtocell base station according to an exemplary embodiment of the present disclosure includes receiving pilot signals from one or more macro cell base stations located in surroundings of a femtocell and measuring intensities of the pilot signals; receiving use frequency information and pilot signal transmission power information from the one or more macro cell base stations; determining a position of the femtocell within a reference macro cell according to an intensity of a reference pilot signal having a maximum signal intensity among the received pilot signals; determining a use frequency of the femtocell according to the position of the femtocell; and determining a transmission power of the femtocell according to the use frequency and the intensity of the reference pilot signal of the femtocell.