Abstract: The present disclosure relates to a compound having the activity of promoting osteoblast differentiation and inhibiting adipocyte differentiation and a preparation method thereof. The novel compound of the present disclosure increases the expression of the gene ALP involved in the differentiation of osteoblasts, regulates expression of the genes PPAR?, aP2 and CD36 involved in the differentiation of adipocytes, increases bone mineral density (BMD) in an ovariectomized osteoporosis animal model and decreases adipocytes in the bone marrow. Therefore, it can be used as an active ingredient of a medication or a health functional food useful for metabolic bone disease or obesity.

Abstract: The present disclosure relates to a compound having the activity of promoting osteoblast differentiation and inhibiting adipocyte differentiation and a preparation method thereof. The novel compound of the present disclosure increases the expression of the gene ALP involved in the differentiation of osteoblasts, regulates expression of the genes PPAR?, aP2 and CD36 involved in the differentiation of adipocytes, increases bone mineral density (BMD) in an ovariectomized osteoporosis animal model and decreases adipocytes in the bone marrow. Therefore, it can be used as an active ingredient of a medication or a health functional food useful for metabolic bone disease or obesity.

Abstract: Provided is a link synchronization method for a radio frequency repeater that can perform link route switching at an accurate time point by measuring reception signal power at a predetermined period for a predetermined time duration, accumulating and comparing them with a reference level, and detecting a link termination time point. The method includes: a) setting up an initial link route; b) measuring received signal power in the initial link route; c) accumulating the reception signal power received for a predetermined time at a predetermined period, when the reception signal power is detected; d) setting up a reference level for link switching based on the accumulated reception signal power; e) detecting a link termination time point by finding an edge in a waveform of the accumulated reception signal power based on the reference level; and f) switching the current link route based on the detected link termination time point.

Abstract: Provided is a link synchronization method for a radio frequency repeater that can perform link route switching at an accurate time point by measuring reception signal power at a predetermined period for a predetermined time duration, accumulating and comparing them with a reference level, and detecting a link termination time point. The method includes: a) setting up an initial link route; b) measuring received signal power in the initial link route; c) accumulating the reception signal power received for a predetermined time at a predetermined period, when the reception signal power is detected; d) setting up a reference level for link switching based on the accumulated reception signal power; e) detecting a link termination time point by finding an edge in a waveform of the accumulated reception signal power based on the reference level; and f) switching the current link route based on the detected link termination time point.