Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery using a positive electrode containing the positive electrode active material. More particularly, the present invention relates to a positive electrode active material that is able to solve a problem of increased resistance according to an increase in Ni content by forming a charge transport channel in a lithium composite oxide and a lithium secondary battery using a positive electrode containing the positive electrode active material.

Abstract: Provided is a hybrid beaconing method in which a centralized beaconing scheme and a distributed beaconing scheme are combined. In the hybrid beaconing method, a beaconing scheme is converted according to a network condition, and a centralized beaconing scheme or a distributed beaconing scheme is used to maintain an optimum network status.

Abstract: Provided is a method and apparatus for efficiently transmitting and receiving a frame including a header and a payload in a communication system. If the number of repeated items in the content of a header of the frame is high, specific preambles are allocated to the repeated items and the repeated items are omitted. Accordingly, data transfer efficiency can be improved.

Abstract: A resource reservation method between a master device and a slave device or between slave devices in a centralized network. In resource reservation between slave devices, optimal resources may be allocated by performing link measurement between the slave devices before allocating the resources.

Abstract: The present invention relates to fat composition, more specifically relates to 60% to 99.9% by weight of diglyceride containing 0.1 to 89.9% by weight of conjugated linoleic acid; 0.001% to 0.2% by weight of banaba extracts fermented by microorganism such as Bacillus sp. or Aspergillus sp.; and the balance being monoglyceride, triglyceride or a mixture thereof. The fat composition of the present invention comprises fermented banaba extracts as an antioxidant, and the fat composition excels in oxidation stability and keeping stability, therefore the fat composition of the present invention may be widely used as cooking oil.

Abstract: Provided is a method and apparatus for efficiently transmitting and receiving a frame including a header and a payload in a communication system. If the number of repeated items in the content of a header of the frame is high, specific preambles are allocated to the repeated items and the repeated items are omitted. Accordingly, data transfer efficiency can be improved.

Abstract: A resource reservation method between a master device and a slave device or between slave devices in a centralized network. In resource reservation between slave devices, optimal resources may be allocated by performing link measurement between the slave devices before allocating the resources.

Abstract: Provided are a glyceride oil composition derived from a fish oil and a preparation method thereof. The composition includes docosahexaenoic acid (DHA) and docosapentaenoic acid (DPA) with a content of 45 to 95% by weight and eicosapentaenoic acid (EPA) with a content of 0.001 to 13% by weight among constituent fatty acids, and a saturated fatty acid having 16 to 18 carbon atoms, which is bonded at 1- and 3-positions, with a content of 0.001 to 5% by weight among constituent fatty acids, in which a weight ratio of docosahexaenoic acid (DHA)/docosapentaenoic acid (DPA) is 0.5 to 8 and a weight ratio of docosahexaenoic acid (DHA)/eicosapentaenoic acid (EPA) is 3.5 to 15. The glyceride oil composition derived from fish oil has nutritional and physiological superiority due to containing a great amount of polyunsaturated fatty acids such as DHA and DPA in a form of glyceride, and can minimize disadvantages of EPA such as inhibition of ?-6 fatty acid metabolism by containing a low amount of EPA.

Abstract: Provided is a hybrid beaconing method in which a centralized beaconing scheme and a distributed beaconing scheme are combined.

Abstract: Provided are a glyceride oil composition derived from a fish oil and a preparation method thereof. The composition includes docosahexaenoic acid (DHA) and docosapentaenoic acid (DPA) with a content of 45 to 95% by weight and eicosapentaenoic acid (EPA) with a content of 0.001 to 13% by weight among constituent fatty acids, and a saturated fatty acid having 16 to 18 carbon atoms, which is bonded at 1- and 3-positions, with a content of 0.001 to 5% by weight among constituent fatty acids, in which a weight ratio of docosahexaenoic acid (DHA)/docosapentaenoic acid (DPA) is 0.5 to 8 and a weight ratio of docosahexaenoic acid (DHA)/eicosapentaenoic acid (EPA) is 3.5 to 15. The glyceride oil composition derived from fish oil has nutritional and physiological superiority due to containing a great amount of polyunsaturated fatty acids such as DHA and DPA in a form of glyceride, and can minimize disadvantages of EPA such as inhibition of ?-6 fatty acid metabolism by containing a low amount of EPA.

Abstract: The present invention relates to fat composition, more specifically relates to 60% to 99.9% by weight of diglyceride containing 0.1 to 89.9% by weight of conjugated linoleic acid; 0.001% to 0.2% by weight of banaba extracts fermented by microorganism such as Bacillus sp. or Aspergillus sp.; and the balance being monoglyceride, triglyceride or a mixture thereof. The fat composition of the present invention comprises fermented banaba extracts as an antioxidant, and the fat composition excels in oxidation stability and keeping stability, therefore the fat composition of the present invention may be widely used as cooking oil.