Abstract: A method for transmitting voice data is provided. The method may include receiving voice data of a particular speaker from a voice data collection server; determining whether destination terminals are first-type terminals; and based on a determination that the destination terminals are the first-type terminals, transmitting the received voice data to the destination terminals through a channel corresponding to the particular speaker, from among a plurality of predefined channels for the destination terminals.

Abstract: Disclosed herein are an anthracene derivative represented by [Chemical Formula A] and an organic light-emitting diode comprising same. In [Chemical Formula A], the substituents R1 to R5, R, R11 to R18, L1, and n are as defined in the description.

Abstract: An embodiment mounting and demounting device for a wireless electronic device includes a pair of holder wings arranged symmetrically to each other and configured to press both sides of the wireless electronic device, a holder wing adjusting device configured to apply a force to adjust a gap between the holder wings using a driving force of a drive motor, a lifting implementing device configured to interlock with the holder wing adjusting device to lift the wireless electronic device upward in a case in which the holder wings are spread apart by a predetermined reference gap or more, a lower housing wrapped around a lower side of the holder wings, the holder wing adjusting device, and the lifting implementing device, and an upper housing coupled to an upper side of the lower housing and configured to allow the wireless electronic device to pass through in an up and down direction.

Abstract: A negative active material for a rechargeable lithium battery includes a composite carbon particle including a core particle including crystalline-based carbon and a coating layer positioned on the surface of the core particle and including amorphous carbon. A peak intensity (I1620) at 1620 cm?1 ranges from about 0.01 to about 0.1, a peak intensity (I1360) at 1360 cm?1 ranges from about 0.05 to about 0.5, and a peak intensity (I1580 at 1580 cm?1 ranges from about 0.1 to about 0.8 in a Raman spectrum of the composite carbon particle.

Abstract: A negative active material for a rechargeable lithium battery includes a composite carbon particle including a core particle including crystalline-based carbon and a coating layer positioned on the surface of the core particle and including amorphous carbon. A peak intensity (I1620) at 1620 cm?1 ranges from about 0.01 to about 0.1, a peak intensity (I1360) at 1360 cm?1 ranges from about 0.05 to about 0.5, and a peak intensity (I1580at 1580 cm?1 ranges from about 0.1 to about 0.8 in a Raman spectrum of the composite carbon particle.