Revisiting calculation of tilt angles for double-tilt sample holders in transmission electron microscopes.

We revisited the formula related to the overall tilt angle of a specimen using a side-entry double-tilt sample holder in a transmission electron microscope. Initially, we examined existing formulas in the literature for calculating the overall tilt angle. Subsequently, a new formula was derived, proven to better account for the actions of the double-tilt holder, thereby providing improved accuracy in the calculation.

Comparison of two methods for determination of crystal orientation using two Kikuchi pairs in electron diffraction patterns.

Kikuchi diffraction pattern analysis is one of the essential techniques of transmission electron microscopy used in materials science. For instance, one important application is its use in crystal orientation determination. During the development of SAKI5 software for the simulation and analysis of Kikuchi patterns, two methods in the literature for crystal orientation determination from two independent Kikuchi pairs have been revisited and then implemented.

A modulated structure derived from the XA-type MnRuSn Heusler compound.

A modulated structure derived from the inverse Heusler phase (the XA-type and the disordered variant L2B-type) has been observed in rapidly quenched MnRuSn ribbons. The powder X-ray diffraction pattern of the quenched ribbons can be indexed as an L2B-type structure. Electron diffraction patterns of the new structure mostly resemble those of the XA-type (and the disordered variant L2B-type) structure and additional reflections with denser spacing indicate a long periodicity.

[Correlation between highest point of greater trochanter and the ideal entry point for antegrade femoral nailing by three-dimensional images].

Objective: To provide reference of the ideal entry point for antegrade femoral nailing according to analysis correlation between highest point of greater trochanter and the middle line of the medullary cavity in adults by three-dimensional images.

Methods: From January 2016 to January 2017, 107 adults who underwent continuous computed tomography (CT) scans were ultimately enrolled, including 64 males and 43 females with an average age of (51.7±16.

[Effects of thinning intensities on reproductive modules of Quercus liaotungensis in Huanglong and Qiaoshan Mountains, Northwest China].

Taking the Quercus liaotungensis middle-aged forests in Huanglong and Qiaoshan Mountains as study objects, the average size of individual trees of Q. liaotungensis, yield and rate of its reproductive modules, as well as their spatial distribution characteristics were investigated in five years after thinning at different intensities (CK, 10%, 20% and 30%), in order to demonstrate the impact of thinning intensity on reproductive modules of Q. liaotungensis.