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Abstract

A large class of nonlinear systems can be represented or well approximated by Takagi- Sugeno (TS) fuzzy models, which in theory can approximate a general nonlinear system to an arbitrary degree of accuracy. The TS fuzzy model consists of a fuzzy rule base. The rule antecedents partition a given subspace of the model variables into fuzzy regions, while the consequent of each rule is usually a linear or affine model, valid locally in the corresponding region. In this paper, the observer design problem for a T-S fuzzy system subject to Lypschitz perturbation is investigated. First, an observer of Kalman type is designed to estimate the unknown system states. Then, the class of one-sided Lipschitz for a TS fuzzy system subject to a sufficient condition on the bound is studied. The challenges are discussed and some analysis oriented tools are provided. An example is given to show the applicability of the main result.
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Authors and Affiliations

Francois Delmotte
1
Mohamed Ali Hammami
2
Nour El Houda Rettab
2

  1. University of Artois, Bethune, France
  2. University of Sfax, Faculty of Sciences of Sfax, Tunisia
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Abstract

The author writes about an important problem of maritime commercial law. She draws attention to the possibility of exploiting a form of understanding among ship owners (called line conferences), even on the basis of European law. This will be a matter of importance from the perspective of the interests of Polish ship owners after Poland's accession to the European Union. At the same time the author draws attention to the OECD report which indicates that this specific feature of maritime transport already belongs to the past, and that one can be certain that liberal tendencies will also extend to the business of ship owning. The future will show if the member states of the OECD will adapt to this tendency. It appears that the reform of shipping legislation in the USA in 1988 began a new era of the gradual opening of the shipping-line sector to free competition. Reform will also take this direction in the European Community, although the process will certainly not be speedy.
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Authors and Affiliations

Małgorzata Anna Nesterowicz
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Abstract

John Rawls develops and precisely defines the concept of civil disobedience which had emerged from the American tradition of democracy and was already discussed in the 19th century by H.D. Thoreau. It is a part of a theory of ‘justice as fairness’ and it rigidly supports the conditions of resistance to the state employed in the effort to sustain moral order in the practice of democracy. This effort cannot be interpreted as a revolutionary rebellion against the state and law, for it aspires to implement a kind of reform which aims at a restoration of justice whenever it is deeply neglected or violated. In the nub of this theory lies the claim of the importance of the civil conscience as formed by the principles of constitution which reflect the principles of justice without presupposing an extended theory of good. The normative paradigm of ethics, according to which Rawls presents his theory of justice, should be complemented by virtue ethics, argues the author, and points to that the absence of civil virtues manifested deplorably in the present weakness of liberal democracy in the face of the growing pressure from populism.
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Bibliography

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Authors and Affiliations

Alfred Marek Wierzbicki
1
ORCID: ORCID

  1. Katolicki Uniwersytet Lubelski Jana Pawła II, Wydział Filozofii, Al. Racławickie 14, 20‑950 Lublin
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Abstract

Natural fiber polymer composites are gaining focus as low cost and light weight composite material due to the availability and ecofriendly nature of the natural fiber. Fiber composites are widely used in civil engineering, marine and aerospace industries where dynamic loads and environmental loads persist. Dynamic analysis of these composites under different loading and environmental conditions is essential before their usage. The present study focuses on the dynamic behavior of areca nut husk reinforced epoxy composites under different loading frequencies (5 Hz, 10 Hz and 15 Hz) and different temperatures (ranging from 28ºC to 120ºC). The effect of loading and temperature on storage modulus, loss modulus and glass transition temperature was analyzed. Increase in storage modulus is observed with increase in loading frequency. The storage modulus decreases with increase in temperature. The glass transition temperature of the composite is determined to be 105ºC. The elastic modulus calculated from the DMA data is compared with three point bending test.

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Bibliography

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Authors and Affiliations

N. Muralidhar
1
Kaliveeran Vadivuchezhian
1
V. Arumugam
2
I. Srinivasula Reddy
1

  1. Department of Applied Mechanics and Hydraulics, National Institute of Technology Karnataka, Mangalore, India.
  2. Department of Aerospace Engineering, Madras Institute of Technology, Anna University, Chennai, India.

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