scholarly journals Beyond the Checklist Approach: A Librarian-Faculty Collaboration to Teach the BEAM Method of Source Evaluation

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Jenny Mills ◽  
◽  
Rachael Flynn ◽  
Nicole Fox ◽  
Dana Shaw ◽  
...  
Keyword(s):  
Faculty Collaboration ◽  
Source Evaluation ◽  
Beam Method

Computer simulations for the TEM bend contour technique

1996 ◽  
Vol 54 ◽  
pp. 134-135
Author(s):  
Vladimir Yu. Kolosov ◽  
Anders R. Thölén
Keyword(s):  
Computer Simulations ◽  
Real Space ◽  
Advantages And Disadvantages ◽  
Short Overview ◽  
Diffraction Contrast ◽  
Beam Method ◽  
Convergent Beam ◽  
Contour Technique

In this paper we give a short overview of two TEM applications utilizing the extinction bend contour technique (BC) giving the advantages and disadvantages; especially we consider two areas in which the BC technique remains unique. Special attention is given to an approach including computer simulations of TEM micrographs.BC patterns are often observed in TEM studies but are rarely exploited in a serious way. However, this type of diffraction contrast was one of the first to be used for analysis of imperfections in crystalline foils, but since then only some groups have utilized the BC technique. The most extensive studies were performed by Steeds, Eades and colleagues. They were the first to demonstrate the unique possibilities of the BC method and named it real space crystallography, which developed later into the somewhat similar but more powerful convergent beam method. Maybe, due to the difficulties in analysis, BCs have seldom been used in TEM, and then mainly to visualize different imperfections and transformations.

Split beam method for determining mode shapes of cantilever beams under multiple loading conditions

2021 ◽  
pp. 107754632110276
Author(s):  
Jun-Jie Li ◽  
Shuo-Feng Chiu ◽  
Sheng D Chao
Keyword(s):  
Operation Mode ◽  
Point Contact ◽  
Mode Shapes ◽  
Cantilever Beams ◽  
Loading Conditions ◽  
Mechanical Responses ◽  
Relative Contribution ◽  
Resonance Frequencies ◽  
Beam Method ◽  
Multiple Loading

We have developed a general method, dubbed the split beam method, to solve Euler–Bernoulli equations for cantilever beams under multiple loading conditions. This kind of problem is, in general, a difficult inhomogeneous eigenvalue problem. The new idea is to split the original beam into two (or more) effective beams, each of which corresponds to one specific load and bears its own Young’s modulus. The mode shape of the original beam can be obtained by linearly superposing those of the effective beams. We apply the split beam method to simulating mechanical responses of an atomic force microscope probe in the “dynamical” operation mode, under which there are a stabilizing force at the positioner and a point-contact force at the tip. Compared with traditional analytical or numerical methods, the split beam method uses only a few number of basis functions from each effective beam, so a very fast convergence rate is observed in solving both the resonance frequencies and the mode shapes at the same time. Moreover, by examining the superposition coefficients, the split beam method provides a physical insight into the relative contribution of an individual load on the beam.

InGaAlAs /InGaAs and InAlAs/InGaAlAs Quantum-Well Structures Grown by MBE Using Pulsed Molecular Beam Method

1986 ◽  
Vol 25 (Part 2, No. 7) ◽  
pp. L598-L600 ◽  
Author(s):  
Toshio Fujii ◽  
Yoshiaki Nakata ◽  
Shunichi Muto ◽  
Satoshi Hiyamizu
Keyword(s):  
Quantum Well ◽  
Molecular Beam ◽  
Quantum Well Structures ◽  
Beam Method

Computation of mode eigenfunctions in graded-index optical fibers by the propagating beam method

1980 ◽  
Vol 19 (13) ◽  
pp. 2240 ◽  
Author(s):  
M. D. Feit ◽  
J. A. Fleck
Keyword(s):  
Optical Fibers ◽  
Graded Index ◽  
Beam Method
Sign in / Sign up

Export Citation Format

Share Document