in this research the quality of walnut kernels under impact loading were studied. due to unavailability of specific varieties of walnut in iran, the tests were carried out on the available genotypes. three different genotypes from walnut orchards of azarshar region were selected and were collected in 2009. a drop test device was designed and constructed to perform the experiments. the impact te...

We present an improved MR brain image registration algorithm, called TPS-HAMMER, which is based on the concepts of attribute vectors and hierarchical landmark selection scheme proposed in the highly successful HAMMER registration algorithm. We demonstrate that TPS-HAMMER algorithm yields better registration accuracy, robustness, and speed over HAMMER owing to (1) the employment of soft correspo...

In the long distance pressure pipeline, sudden change of instantaneous caused by rapid liquid velocity is called water hammer, which seriously threatens safe operation hydropower station. this paper, development and calculation methods transient flow percussion theory are introduced, different models numerical analyzed compared. Finally, problems in research hammer prevention measures summarize...

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The purpose of this study was to investigate the variables that contributed most to maximum throwing distance in the hammer throw event in track and field. A 41item survey instrument was developed to collect data regarding national level collegiate hammer throwers throughout the United States. Multiple regression analysis for hammer throw personal record (PR) yielded a significant model (r=0.81...

The motion of the striking point on the piano hammer was measured before and during string contact by means of an optical equipment. The measurements resolved the motion in two perpendicular components; in the striking direction (vertical), and in the string direction (horizontal). The influence of dynamic level and touch on the hammer motion was studied. Three different types of touch were eva...