Statistical analysis of atom probe data: Detecting the early stages of solute clustering and/or co-segregation

2009 ◽  
Vol 109 (5) ◽  
pp. 502-509 ◽  
Author(s):  
J.M. Hyde ◽  
A. Cerezo ◽  
T.J. Williams
Keyword(s):  
Statistical Analysis ◽  
Atom Probe ◽  
Early Stages

Risk assessment of additional financial costs on the example of implementation of projects of the rocket space industry

2021 ◽  
pp. 77-84
Author(s):  
Е.В. Докукина ◽  
Е.В. Парфенова
Keyword(s):  
Risk Assessment ◽  
Life Cycle ◽  
Statistical Analysis ◽  
Economic Indicators ◽  
Early Stages ◽  
Space Industry ◽  
Financial Costs ◽  
Additional Costs ◽  
Technical And Economic Indicators

В работе исследуется один из возможных метод оценки риска дополнительных финансовых незапланированных затрат в рамках реализации проектов ракетно-космической отрасли, поскольку по различным причинам они не учитывались при определении технико-экономических показателей реализуемого перспективного проекта. Следовательно, предлагаемый метод позволяет на ранних стадиях проведения исследований оценить дополнительные затраты и учесть их влияние на конечные технико-экономические показатели перспективного проекта. Метод строится на основе статистического анализа затрат по этапам жизненного цикла и по проекту в целом. По итогам исследования сделан вывод о том, что риск дополнительных финансовых затрат может снизить эффективность проекта в полтора - три раза. The paper explores one of the possible methods for assessing the risk of additional unplanned costs for the implementation of a promising project. Under additional means costs that for some reason were not planned when determining the technical and economic indicators of the prospective project being implemented. The proposed method allows for the early stages of research to assess the additional costs and take into account their impact on the final technical and economic indicators of a promising project. The method is based on a statistical analysis of costs for the stages of the life cycle and for the project as a whole. The study concluded that the risk of additional costs may reduce the effectiveness of the project in one and a half to three times.

Risks of Using Statistical Analysis Tools in Project Management Environments

2020 ◽  
Vol 7 (2) ◽  
pp. 1-19
Author(s):  
Brian J. Galli
Keyword(s):  
Risk Management ◽  
Project Management ◽  
Statistical Analysis ◽  
Common Type ◽  
Systematic Search ◽  
Statistical Tools ◽  
Early Stages ◽  
Analysis Tools ◽  
The Common ◽  
The Relationship

The purpose of this study is to examine the risks of using statistical tools in a project basis. A systematic search of certain academic databases has been conducted for this study. Statistical tools could be used in a project, and they should be properly planned and designed. Statistical tools include major activities, such as collecting and analyzing data, providing meaningful interpretation, and reporting findings. When dealing with statistical tools, there are several risks that may exist and impact the project either positively or negatively. This study covers a brief outline of the risk management, statistical tools, and the relationship between the two concepts. Finally, a discussion of the common type of risks that are initiated by using statistical analysis tools are provided, which could be planned, identified, and analyzed in the early stages of the project.

STATISTICAL ANALYSIS OF ATOM PROBE DATA

1986 ◽  
Vol 47 (C7) ◽  
pp. C7-489-C7-494
Author(s):  
L. V. ALVENSLEBEN ◽  
R. GRÜNE ◽  
A. HÜTTEN ◽  
M. OEHRING
Keyword(s):  
Statistical Analysis ◽  
Atom Probe

ON THE STATISTICAL ANALYSIS OF ATOM PROBE DATA

1987 ◽  
Vol 48 (C6) ◽  
pp. C6-559-C6-564 ◽  
Author(s):  
M. G. Hetherington ◽  
M. K. Miller
Keyword(s):  
Statistical Analysis ◽  
Atom Probe

The Measurement of Composition During the Early Stages of the Spinodal Decomposition of Fe-Cr Alloys

1990 ◽  
Vol 186 ◽  
Author(s):  
M.G. Hetherington ◽  
J.M. Hyde ◽  
M.K. Miller
Keyword(s):  
Monte Carlo ◽  
Phase Separation ◽  
Spinodal Decomposition ◽  
Atom Probe ◽  
Statistical Techniques ◽  
Fine Scale ◽  
Monte Carlo Calculations ◽  
Early Stages ◽  
Non Linear

AbstractThe properties of many advanced alloys are derived from extremely fine-scale microstructures. This poses interesting questions about the measurement of composition on this scale. The phase separation of model Fe-Cr alloys has been been studied with the atom-probe. Statistical techniques have been used to estimate the composition and compare the results with the predictions of linear and non-linear theories of spinodal decomposition and the distributions obtained from Monte-Carlo calculations.

Atom Probe Tomography I. Early Stages of Precipitation of NbC and NbN in Ferritic Steels

2006 ◽  
Vol 8 (12) ◽  
pp. 1202-1205 ◽  
Author(s):  
F. Danoix ◽  
E. Bémont ◽  
P. Maugis ◽  
D. Blavette
Keyword(s):  
Atom Probe Tomography ◽  
Atom Probe ◽  
Ferritic Steels ◽  
Early Stages

The Early Stages of Silicide Formation on Metal and Silicon Surfaces, Time-of-Flight Atom-Probe Studies of Atomic Structures and Compositions

1983 ◽  
Vol 25 ◽  
Author(s):  
T. T. Tsong
Keyword(s):  
Low Temperature ◽  
Adsorption Layer ◽  
Depth Profiling ◽  
Atom Probe ◽  
Silicon Surfaces ◽  
Silicide Formation ◽  
Future Directions ◽  
Atomic Structures ◽  
Early Stages ◽  
Temperature Diffusion

ABSTRACTThe early stages of silicide formation on metal and silicon surfaces have been studied in the atom-probe FIM. Precursors to silicide formation are low temperature diffusion of single Si atoms, their interactions, and adsorption layer superstructure formation. These phenomena have been studied quantitatively. At high temperatures, silicide films can be formed. Four distinctive stages of silicide formation on tungsten surfaces have been observed from the atomically resolved FIM images. Formation of silicide layers on platinum, nickel, and silicon surfaces have also been studied. From both the atom-probe compositional depth profiling and the FIM observation one can conclude that the interface formed at low temperature is sharp. At high temperature, Si atoms can diffuse deep into a Pt matrix and Ni atoms into a Si matrix. Conclusions drawn from these atom-probe studies are summarized, and future directions suggested.

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