Abstract: A method for an ionosonde to analyze the electron density of the ionosphere includes: receiving oblique sounding data in an oblique direction, rather than vertically above the ionosonde in the sky; converting the oblique sounding data into vertical sounding data; calculating the amplitude array based on the vertical sounding data; and analyzing the electron density of the ionosphere in the sky at an intermediate location based on the oblique sounding data and the converted vertical sounding data.

Abstract: The present invention provides a pronunciation correction method for assisting a foreign language learner in correcting a position of a tongue or a shape of lips when pronouncing a foreign language. According to a implementation of this invention, the pronunciation correction method comprises receiving an audio signal constituting pronunciation of a user for a phonetic symbol selected as a target to be practiced, analyzing the audio signal, generating a tongue position image according to the audio signal based on the analysis results, and displaying the generated tongue position image.

Abstract: Provided is an apparatus and method for analyzing an effect on a wireless communication system that may analyze an effect of a solar activity on a wireless communication system based on strength of solar cosmic radio waves. An apparatus for analyzing an effect on a wireless communication system may include a solar cosmic radio wave strength collecting unit to collect strength of solar cosmic radio waves according to a solar activity; and an interference determining unit to determine a level of interference of the solar activity against the wireless communication system, based on the strength of solar cosmic radio waves.

Abstract: A communication service equipment and a search and rescue terminal device for vessels that are set on board to provide radio communication service including at least one radio signal transmission and reception units, a modulation and demodulation unit, a location information receiving unit, a plurality of frequency conversion unit, signal processing units each connected to the frequency conversion unit, a main control unit, and control the signal processing unit.

Abstract: Disclosed is a sensing apparatus, a network system, and a controlling method on the basis of a satellite. A satellite-based sensing network system, comprising: a plurality of satellite transmitters that collect information on a peripheral environment and an operating state, and transmits it to peripheral satellites; a satellite wireless receiving/display device that directly receives and displays the information collected from the satellites; a ground control center that receives, stores, and analyzes the information collected from the satellites; and a management center that maintains and repairs the satellite transmitter based on the analyzed results.

Abstract: A communication service equipment and a search and rescue terminal device for vessels that are set on board to provide radio communication service including at least one radio signal transmission and reception units, a modulation and demodulation unit, a location information receiving unit, a plurality of frequency conversion unit, signal processing units each connected to the frequency conversion unit, a main control unit, and control the signal processing unit.

Abstract: Disclosed are electrodes for lithium secondary batteries having enhanced cycle performance and lithium secondary batteries comprising the same. More particularly, the present invention provides an electrode for lithium secondary battery with improved initial charge/discharge characteristics and cycle life characteristics at high temperature, which includes silane based additives as a constitutional component of the electrode and forms a passivation film during an initial charge/discharge process and, in addition, a lithium secondary battery comprising the above electrode.

Abstract: An apparatus for repeating a signal from a satellite using a microstrip patch array antenna is disclosed. The apparatus includes: a receiving unit for receiving the signal and amplifying the receiving signal; a radiating unit for radiating the amplified signal to the shadow area; and a feeding unit for feeding the amplified signal to the radiating unit.