Surveys of star-forming regions reveal that the dust mass protoplanetary discs decreases by several orders magnitude on a timescale few million years. This decrease in budget solids is likely due to gas-drag-induced radial drift mm-sized solids, called pebbles. However, quantifying evolution this component young stellar clusters difficult inherent large spread masses and formation times. Theref...

abstract   modern beehive (langstroth) has entered in iran more than 60 years ago. through these years beehive has been changed differently. losing inner lid, integration of bottom and body and lack of uniformity in body and frame size has detracted it’s performance.! on the other hand, global warming has been an issue in the past 30, 40 years and these hives are not designed for this weather a...

We regularly make serendipitous discoveries in both online and offline contexts – from stumbling upon a useful website when searching for something completely different to meeting someone with mutual research or business interests in an unlikely place. However, most existing interactive systems do not provide a fertile environment for serendipity to occur. This workshop will identify key requir...

background india’s health sector witnessed some major policy changes in 1990s that aimed at making health services more accessible to the population.   methods in this paper, i tried to present some preliminary results of the significant changes that occurred between 1995/6 and 2004, especially in relation to the question of access to healthcare for the poor and rural population using data from...