Effects of dynamic aeroelasticity on handling qualities and pilot rating

Pilot performance parameters, such as pilot ratings, tracking errors, and pilot comments were determined for a longitudinal pitch tracking task using a large, flexible bomber with parametric variations in the undamped natural frequencies of the two lowest frequency symmetric elastic modes. This pitch tracking task was programmed on a fixed base simulator with an electronic attitude-director display of pitch command, pitch angle, and pitch error. Low frequency structural flexibility significantly affects the handling qualities and pilot ratings in the task evaluated

Studies of (GaAI)As injection lasers operating with an optical fiber resonator

The characteristics of an optical fiber external resonator in conjunction with (GaAl)As stripe geometry lasers are described. We have observed a 6–10% reduction in the threshold current and have obtained 150 ps pulses at gigahertz repetition rates. The fiber resonator has also been used to quench self‐pulsations in a (GaAl)As injection laser. In order to explain many of our results we have used a model that uses the conventional semiconductor rate equations modified by the addition of saturable electron traps and the effects of the external cavity. Our results predict many of the self‐locking effects observed in injection lasers operating in an external cavity. Furthermore, the degree of self‐locking will be a strong function of the external cavity length and the density of saturable absorbers

Analisis Kinerja 14 Reksa Dana Saham Terbaik Periode 2010

Capital Market is a significant indicator of an economy for a country. However, in Indonesia many people are not familiar yet with the investment activity in capital market. The writer is then interested to study the performance of the best (15) mutual fund (shares) 2010 version of Investor Magazine for the next period investment decision in 2011. The research will be focused on several stages. First, it will compute the return for 14 mutual funds, market return and risk-free rate for one year period. Then, the performance will be evaluated using Sharpe, Treynor to find which mutual fund outperform the market. Also, each method will result rank of the best mutual fund. Furthermore, there is one more method will be used in performance evaluation, Jensen. The result of this study is there are two mutual funds that can be recommended for investment in 2011, they are Panin Dana Maksima and Panin Dana Prima. They are recommended because the two mutual funds showed the best performance for those three methods of evaluation and they can maintain their performance for more than one period

Optimization Stock Portfolio with Mean-Variance and Linear Programming: Case in Indonesia Stock Market

It is observed that the number of Indonesia's domestic investor who involved in the stock exchange is very less compare to its total number of population (only about 0.1%). As a result, Indonesia Stock Exchange (IDX) is highly affected by foreign investor that can threat the economy. Domestic investor tends to invest in risk-free asset such as deposit in the bank since they are not familiar yet with the stock market and anxious about the risk (risk-averse type of investor). Therefore, it is important to educate domestic investor to involve in the stock exchange. Investing in portfolio of stock is one of the best choices for risk-averse investor (such as Indonesia domestic investor) since it offers lower risk for a given level of return. This paper studies the optimization of Indonesian stock portfolio. The data is the historical return of 10 stocks of LQ 45 for 5 time series (January 2004 – December 2008). It will be focus on selecting stocks into a portfolio, setting 10 of stock portfolios using mean variance method combining with the linear programming (solver). Furthermore, based on Efficient Frontier concept and Sharpe measurement, there will be one stock portfolio picked as an optimum Portfolio (Namely Portfolio G). Then, Performance of portfolio G will be evaluated by using Sharpe, Treynor and Jensen Measurement to show whether the return of Portfolio G exceeds the market return. This paper also illustrates how the stock composition of the Optimum Portfolio (G) succeeds to predict the portfolio return in the future (5th January – 3rd April 2009). The result of the study observed that optimization portfolio using Mean-Variance (consistent with Markowitz theory) combine with linear programming can be applied into Indonesia stock's portfolio. All the measurements (Sharpe, Jensen, and Treynor) show that the portfolio G is a superior portfolio. It is also been found that the composition (weights) stocks of optimum portfolio (G) can be used to predict the forward return (5th January – 3rd April 2009). It is shown that the stock portfolio return of 5th January – 3rd April 2009) has exceeded the market return for the same period of time based on Sharpe and Treynor measurement

Internal market orientation, a novel approach to improve firm performance in China

This study extends knowledge of internal market orientation (IMO) as a management tool to facilitate employer-employee relation. Employing a quantitative research in China, a conceptual model is presented and tested on 275 companies with 3 respondents from each. IMO is examined as a predictor of firm performance mediated by employee commitment and retention. The results support all the proposed hypotheses and highlight the moderating effect of internal customer-supplier relationships and interdepartmental communication. Ownership type as the third moderator indicates different influence of IMO on the posited causal chain. This study contributes in practice by providing managers and scholars with empirical support of IMO’s effectiveness in firm performance in China. It provides managers from different firms competing in China with a new angle to boost firm performance by inspecting their internal market situation as well as to improve it via understanding internal customers better