Executive Succession, Strategic Reorientation and Performance Growth: A Longitudinal Study in the U.S. Cement Industry

1996 ◽  
Vol 42 (7) ◽  
pp. 939-953 ◽  
Author(s):  
Michael L. Tushman ◽  
Lori Rosenkopf
Keyword(s):  
Longitudinal Study ◽  
Cement Industry ◽  
Executive Succession ◽  
And Performance ◽  
The U.S

scholarly journals A Longitudinal Study of the Bladder Cancer Applying a State-Space Model with Non-Exponential Staying Time in States

Mathematics ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 363
Author(s):  
Delia Montoro-Cazorla ◽  
Rafael Pérez-Ocón ◽  
Alicia Pereira das Neves-Yedig
Keyword(s):  
Bladder Cancer ◽  
Longitudinal Study ◽  
State Space Model ◽  
Exponential Distributions ◽  
Significance Level ◽  
Phase Type Distributions ◽  
And Performance ◽  
The Times ◽  
Comparison Of The Results ◽  
Staying Time

A longitudinal study for 847 bladder cancer patients for a period of fifteen years is presented. After the first surgery, the patients undergo successive ones (recurrences). A state-model is selected for analyzing the evolution of the cancer, based on the distribution of the times between recurrences. These times do not follow exponential distributions, and are approximated by phase-type distributions. Under these conditions, a multidimensional Markov process governs the evolution of the disease. The survival probability and mean times in the different states (levels) of the disease are calculated empirically and also by applying the Markov model, the comparison of the results indicate that the model is well-fitted to the data to an acceptable significance level of 0.05. Two sub-cohorts are well-differenced: those reaching progression (the bladder is removed) and those that do not. These two cases are separately studied and performance measures calculated, and the comparison reveals details about the characteristics of the patients in these groups.

scholarly journals Development, selection criteria, and performance of Composite IV sheep at the U.S. Meat Animal Research Center1,2

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. S150-S154
Author(s):  
Thomas W Murphy ◽  
Brad A Freking ◽  
Gary L Bennett ◽  
John W Keele
Keyword(s):  
Selection Criteria ◽  
Animal Research ◽  
Meat Animal ◽  
And Performance ◽  
The U.S

On improving the training of aircraft engineers

2021 ◽  
Vol 20 (5) ◽  
pp. 865-885
Author(s):  
Leonid B. SOBOLEV
Keyword(s):  
Aviation Industry ◽  
Information Protection ◽  
Global Trends ◽  
Space Industry ◽  
The Poor ◽  
Military Aviation ◽  
And Performance ◽  
Performance Results ◽  
The Military ◽  
The U.S

Subject. The article continues the discussion about the method of training aircraft engineers to work in the military and civil segments of aviation and rocket-and-space industry. Objectives. The purpose is to improve the training of Russian engineers to work in the competitive market environment, on the basis of the analysis of experience in training the aviation engineers in leading foreign technical universities. Methods. The study rests on the comparative analysis of implementation of major projects in the military and civil segments of aviation in the U.S. and Russia, as well as programs for training aircraft engineers in both countries. Results. The analysis shows that the duration of modern large military aviation projects in both countries is the same (the comparison of cost is impossible, due to information protection in Russia), while in the civil segment of the aviation industry, Russia's lagging behind is significant both in terms of the duration of projects and performance results. One of the reasons is in the poor training of aircraft engineers to work in the competitive environment. Conclusions. It is crucial to reform Russian aviation universities in terms of conformity to global trends in multidisciplinarity and differentiation of financing and research base.

Longitudinal Study of Preadolescent Sport Self-Concept and Performance: Reciprocal Effects and Causal Ordering

2007 ◽  
Vol 78 (6) ◽  
pp. 1640-1656 ◽  
Author(s):  
Herbert W. Marsh ◽  
Erin Gerlach ◽  
Ulrich Trautwein ◽  
Oliver Lüdtke ◽  
Wolf-Dietrich Brettschneider
Keyword(s):  
Longitudinal Study ◽  
Self Concept ◽  
Reciprocal Effects ◽  
Causal Ordering ◽  
And Performance

scholarly journals Effects of Particle Size and Cement Replacement of LCD Glass Powder in Concrete

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Seong Kyum Kim ◽  
Su Tae Kang ◽  
Jin Kwang Kim ◽  
Il Young Jang
Keyword(s):  
Particle Size ◽  
Glass Powder ◽  
Liquid Crystal Display ◽  
Waste Recycling ◽  
Cement Industry ◽  
Hardened Concrete ◽  
National Scale ◽  
The Sustainable Development ◽  
Technological Level ◽  
And Performance

The high quality liquid crystal display (LCD) processing waste glass (LPWG) generated from the manufacturing process of Korea’s LCD industries, having the world’s highest technological level and production, was finely ground into particles smaller than cement particles (higher fineness than OPC) to verify their applicability and performance as a replacement for cement. For a concrete mix having a W/B ratio of 0.44, cement was replaced with LPWG glass powder (LGP) at ratios of 5, 10, 15, and 20% (LGP12) and 5 and 10% (LGP5) according to the particle size to prepare test cylinder specimens, which were tested with respect to air contents, slump in fresh concrete, and compressive strength and splitting tensile strength of hardened concrete. The microstructure of the concrete specimens was analyzed through Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), and a Mercury Intrusion Porosimetry (MIP). Replacement of cement with LGP for cement could effectively decrease the quantity of cement used due to the excellent performance of LGP. It may positively contribute to the sustainable development of the cement industry as well as waste recycling and environment conservation on a national scale.

scholarly journals Big Data Analytics in E-commerce for the U.S. and China Through Literature Reviewing

2021 ◽  
Vol 9 (1) ◽  
pp. 16-44
Author(s):  
Weiqing Zhuang ◽  
Morgan C. Wang ◽  
Ichiro Nakamoto ◽  
Ming Jiang
Keyword(s):  
Big Data ◽  
Data Analytics ◽  
Web Of Science ◽  
Big Data Analytics ◽  
Theoretical Research ◽  
Analysis Method ◽  
Theoretical Comparison ◽  
Statistical Analysis Method ◽  
And Performance ◽  
The U.S

Abstract Big data analytics (BDA) in e-commerce, which is an emerging field that started in 2006, deeply affects the development of global e-commerce, especially its layout and performance in the U.S. and China. This paper seeks to examine the relative influence of theoretical research of BDA in e-commerce to explain the differences between the U.S. and China by adopting a statistical analysis method on the basis of samples collected from two main literature databases, Web of Science and CNKI, aimed at the U.S. and China. The results of this study help clarify doubts regarding the development of China’s e-commerce, which exceeds that of the U.S. today, in view of the theoretical comparison of BDA in e-commerce between them.

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