background: the aim of this study was to assess effects of cysteamine as an anti-oxidant on rate of in vitro maturation of oocyte and determination of its effects on spindle size and shape. methods: pre-mature mice were primed with pregnant mare stimulating gonadotrophin (pmsg) and germinal vesicle (gv) stage oocytes were obtained 48 h after. the oocytes were cultured in tissue culture medium (...

The thermal error of the motorized spindle is an essential factor affecting machining accuracy high-speed numerically controlled machines. establishment a model for compensation can effectively improve impact errors on machine tool. This paper proposes sparrow search algorithm to optimize Elman neural network predict in spindles. First simulation analysis characteristics A02 spindle. Based resu...

The spindle is a key core component of cotton picker, and its operating parameters directly affect the quality harvesting. In this study, was selected as research object. kinematics mechanics analysis cotton-picking process conducted, dynamic motion trajectory obtained, working affecting picking performance were determined. A test bench for built; speed feed used factors; seed rejection rate, t...

Increasing interest in commercializing functional nanostructured devices heightens the need for cost effective manufacturing approaches for nanostructures. This paper presents an investigation of a scale-up manufacturing approach for nanostructures through diamond turning using a nanoscale multi-tip diamond tool (four tip tool with tip width of 150 nm) fabricated by focused ion beam (FIB). The ...

This paper aims to optimize the quality characteristics of drilling process in glass fiber-reinforced polymer (GFRP) composites. It focuses on optimizing parameters with drill point angles concerning delamination damage and energy consumption, simultaneously. The effects machinability were analyzed by evaluating characteristics. cutting power was modeled through (speed feed), angle, laminate th...

This paper presents the suitable depth of cut, spindle speed and feed rate that will be chosen during machining. If thus parameters are not considered, this can provoke abnormal tool behavior such as chatter. Chatter will limit the tool life which only can be use for just a few times. To predict the chatter occurs, the parameters will be use are spindle speed, depth of cut and feed rate. CNC ma...