QUANTITATIVE SAFETY ASSESSMENT OF AIR TRAFFIC CONTROL SYSTEMS THROUGH SYSTEM CONTROL CAPACITY

Quantitative Safety Assessments (QSA) are essential to safety benefit verification and regulations of developmental changes in safety critical systems like the Air Traffic Control (ATC) systems. Effectiveness of the assessments is particularly desirable today in the safe implementations of revolutionary ATC overhauls like NextGen and SESAR. QSA of ATC systems are however challenged by system complexity and lack of accident data

McCarthy\u27s The Road and Ethical Choice in a Post-Apocalyptic World

In her article McCarthy\u27s The Road and Ethical Choice in a Post-Apocalyptic World Jingjing Guo analyses ethical choice and its implications in McCarthy\u27s The Road. After examining the deterioration of the ethical context and the prevalence of evil reflected in cannibalism, Guo highlights the father\u27s ethical choice and dilemma. Different from most others, the father chooses to keep alive to protect his son, and to stay man and stay good in a physically devastated and morally bankrupted world. Through discussing the meaning of the metaphor fire and carrying the fire, Guo further explores the significance of the father\u27s choice in passing the fire of human race to a new world

Quantum spatial-periodic harmonic model for daily price-limited stock markets

We investigate the behavior of stocks in daily price-limited stock markets by purposing a quantum spatial-periodic harmonic model. The stock price is presumed to oscillate and damp in a quantum spatial-periodic harmonic oscillator potential well. Complicated non-linear relations including inter-band positive correlation and intra-band negative correlation between the volatility and the trading volume of stocks are derived by considering the energy band structure of the model. The validity of price limitation is then examined and abnormal phenomena of a price-limited stock market (Shanghai Stock Exchange) of China are studied by applying our quantum model.Comment: 8 pages, 9 figure

Empirical tests of Fama-French three-factor model and Principle Component Analysis on the Chinese stock market

Date: 2014-06-03 Authors: Kaiwen Wang Jingjing Guo [email protected] [email protected] Mobile: 0762063660 0762187877 Title: Empirical tests of Fama-French three-factor model and Principle Component Analysis on the Chinese stock market Tutor: Anders Vilhelmsson, Department of Business Administration, Lund University Purpose: This paper aim to verify that the Fama-French three factor model (FF) captures more cross-sectional variation in returns for the Chinese stock market than the CAPM, over the period January 2004 to December 2013. Furthermore, we construct statistically optimal factors by using the principal component analysis (PCA) for the Fama-French portfolios and test whether the FF model leaves anything significant that can be explained by the PCA factors. Method: Following the procedure in Fama and French (1993), first we construct FF factors and portfolios based on firm size and book-to-market equity, and then compare the performance between CAPM and FF models by applying time-series regressions. For deeper comparison, we continue to explain the return matrix (120*9) with principal component analysis, which produces several PCs for new time-series regressions and study the overall fitness and factor loadings of both FF and PCA models. To see which model captures the most variation, we run cross-sectional regressions with respect to all the three afore-mentioned models. Conclusion: Our results show that the FF model tends to be more powerful than CAPM for explaining the variations in cross-sectional returns. Yet within the FF model, our data contains one divergence from the US market, we actually find a reversal of book-to-market equity effect. Finally, our results suggest that the PCA model performs better than the FF model

Angst in Albee’s A Delicate Balance

The works of Albee reflected the state of rejection and indignation that invaded the American society in the middle of the last century as manifested in the infiltration of trade forms and industrialization into all fields of life. His first works, including in his play A Delicate Balance Albee focused on the themes of loss and anxiety that the American individual suffered in that period. This paper will try to examine the reasons that drove the main characters in this play to anxiety and loss, and how they lived in complete isolation by their obsession over aging and fear. Also, this paper will touch on the deterioration of relations among family members under the influence of the “American dream” project

Dynamically Driven Protein Allostery Exhibits Disparate Responses for Fast and Slow Motions

AbstractThere is considerable interest in the dynamic aspect of allosteric action, and in a growing list of proteins allostery has been characterized as being mediated predominantly by a change in dynamics, not a transition in conformation. For considering conformational dynamics, a protein molecule can be simplified into a number of relatively rigid microdomains connected by joints, corresponding to, e.g., communities and edges from a community network analysis. Binding of an allosteric activator strengthens intermicrodomain coupling, thereby quenching fast (e.g., picosecond to nanosecond) local motions but initiating slow (e.g., microsecond to millisecond), cross-microdomain correlated motions that are potentially of functional importance. This scenario explains allosteric effects observed in many unrelated proteins