In feedback control design, the Bode sensitivity integral dictates that trade-offs must be made frequency-wise. For multiple-in-multiple-out (MIMO) systems, trade-offs can also be made spatially (element-wise). To do this using ‘norm based’ control methods, such as H2 or H∞, one can only change weights on the inputs and the outputs of the systems. This way, it is not possible to exploit all spa...

Copper smelting slags are hard materials. Therefore,to recover their copper by flotation method, grinding should be carried out to obtain optimal particle size. Copper smelting slags in the Bardeskan district, with work index of 16.24 kwh/st, were grinded for 65 minutes to reach an acceptable degree of freedom for the flotation tests, with particle size of 80%, smaller than 70 μm. With this gri...

This paper presents a control of active suspension for quarter car model with two degree of freedom by using H∞ method. Absolute velocity of car body is measured for feedback. The system parameter variations are treated with multiplicative uncertainty model. Simulation results show that the H∞controller provides good trade-off between ride quality, suspension packaging and road holding constrai...

There is worldwide public expectation that responsible governments will protect their citizens from hazards from which they are unable to protect themselves. Meat and dairy products can pose substantial risks, and international trade in these products relies heavily on government-controlled food safety programmes, assurances and certification as to freedom from unacceptable levels of hazards. C...

This research investigates the determinants of software piracy using panel data analysis. Our dataset contains eleven countries in the Far East during the period 1995 to 2006. Our major empirical result shows a negative relationship between software piracy and the unemployment rate, per capita GDP, and the balance of trade, but a positive relationship in population and economic freedom. These r...

This study empirically investigates the association between country-level socioeconomic characteristics and risk of being victimized in transnational terrorism events. We find that a country's annual financial contribution to the U.N. general operating budget has a positive association with the frequency of being victimized in transnational terrorism events. In addition, per capita GDP, politic...

Several cross-country studies have found that corruption is detrimental to economic growth, but the findings are not universally robust. We utilize the economic freedom index to examine if corruption can facilitate growth by allowing entrepreneurs to avoid inefficient policies and regulations when economic freedom is limited. Using regression analysis, we find that corruption is growth enhancin...

W hether the United Kingdom (UK) should remain in the European Union (EU) or not has been a fiercely debated issue both before and after the referendum in the UK on June 23, 2016. The main purpose of this paper is to evaluate the pros and cons of the UK leaving the EU. It is concluded that if the UK leaves the EU, the resulting economic shock would risk adverse effects on macroecono...