Methodological Problems in the Replacement of Discrete Mass Spectrometric Models by Continuum Models

2018 ◽  
Vol 73 (13) ◽  
pp. 1229-1241 ◽  
Author(s):  
A. S. Berdnikov ◽  
A. N. Verentchikov ◽  
N. V. Konenkov
Keyword(s):  
Mass Spectrometric ◽  
Continuum Models ◽  
Methodological Problems ◽  
Discrete Mass

Simulation of three Dimensional Defect Images in Transmission Electron Microscopy

1976 ◽  
Vol 34 ◽  
pp. 470-471
Author(s):  
W. D. Cooper ◽  
C. S. Hartley ◽  
J. J. Hren
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Three Dimensional ◽  
Crystalline Lattice ◽  
Continuum Models ◽  
Thin Foils ◽  
Transmission Electron ◽  
Microscope Images ◽  
General Computer Program ◽  
General Computer

Interpretation of electron microscope images of crystalline lattice defects can be greatly aided by computer simulation of theoretical contrast from continuum models of such defects in thin foils. Several computer programs exist at the present time, but none are sufficiently general to permit their use as an aid in the identification of the range of defect types encountered in electron microscopy. This paper presents progress in the development of a more general computer program for this purpose which eliminates a number of restrictions contained in other programs. In particular, the program permits a variety of foil geometries and defect types to be simulated.The conventional approximation of non-interacting columns is employed for evaluation of the two-beam dynamical scattering equations by a piecewise solution of the Howie-Whelan equations.

Theoretical and Methodological Problems of a 10-Year Follow-Up Program Evaluation Study

2002 ◽  
Vol 18 (3) ◽  
pp. 229-241 ◽  
Author(s):  
Kurt A. Heller ◽  
Ralph Reimann
Keyword(s):  
Program Evaluation ◽  
Evaluation Studies ◽  
Evaluation Study ◽  
Control Groups ◽  
Cross Sectional ◽  
Long Term Study ◽  
Partial Inclusion ◽  
Methodological Problems

Summary In this paper, conceptual and methodological problems of school program evaluation are discussed. The data were collected in conjunction with a 10 year cross-sectional/longitudinal investigation with partial inclusion of control groups. The experiences and conclusions resulting from this long-term study are revealing not only from the vantage point of the scientific evaluation of new scholastic models, but are also valuable for program evaluation studies in general, particularly in the field of gifted education.

Methodological problems arising from false-positive drug-screenings

2014 ◽  
Vol 47 (06) ◽  
Author(s):  
M Fischer ◽  
S Unterecker ◽  
B Pfuhlmann ◽  
J Deckert
Keyword(s):  
False Positive ◽  
Methodological Problems

Teaching Economics in Distant Form

2003 ◽  
pp. 128-138
Author(s):  
L. Kleyeva
Keyword(s):  
Teaching Economics ◽  
Long Time ◽  
Methodological Problems

The article considers the problems of teaching economics and management in distant form. The necessity of using such a form is connected with the fact that practical managers and professional economists usually have no opportunities to leave their business for a long time. The distant form of education gives them a chance to combine education with their practical activities. Teaching economics in distant form implies certain methodological problems discussed in the article.

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