High-speed imaging and simulations show that the single-celled organism called Chlamydomonas reinhardtii beats its flagella on separate planes, explaining how it generates helical movement.

the diagnostic value of three fetal movements counting in one hour by mother in the diagnosis of decreased fetal movements kamalifard m[1], ghojazadeh m[2], abbasalizadeh sh[3], ghatrehsamani f[4], rabiei l[5]* received: 1 jun, 2012 accepted: 25 aug, 2012abstractbackground & aims: fetal movement counting is a method that used by the mother to quantify her baby's movements. since 1970s a va...

Intuitively, in four-dimensional gauge theories one counts instantons, and in twodimensional string theory one counts holomorphic curves. These correspond to the instanton counting and curve counting in the title. There is no obvious connection between them, but a remarkable physical idea called geometric engineering [9, 10, 11] dictates that they are indeed related. More precisely, the generat...