Inverse Problem Related to Boundary Shape Identification for a Hyperbolic Differential Equation

In this paper, we are interested in the inverse problem of the determination of the unknown part ∂ Ω , Γ 0 of the boundary of a uniformly Lipschitzian domain Ω included in ℝ N from the measurement of the normal derivative ∂ n v on suitable part Γ 0 of its boundary, where v is the solution of the wave equation ∂ t t v x , t − Δ v x , t + p x v x = 0 in Ω × 0 , T and given Dirichlet boundary data. We use shape optimization tools to retrieve the boundary part Γ of ∂ Ω . From necessary conditions, we estimate a Lagrange multiplier k Ω which appears by derivation with respect to the domain. By maximum principle theory for hyperbolic equations and under geometrical assumptions, we prove a uniqueness result of our inverse problem. The Lipschitz stability is established by increasing of the energy of the system. Some numerical simulations are made to illustrate the optimal shape.

The Application of Grice Maxims in Conversation: A Pragmatic Study

In every individual’s life, communicating and interacting with others is vital for carrying out a healthy social and professional relationship. Strictly speaking, we, you and I communicate with one another in our day-to-day life and simply understand each other. Paul Grice’s has presented his cooperative principle theory to explain our day-to-day life conversation. This article aims to review the basic Grecian theory of conversational implicature, identifying important consequences, known problems, and useful extensions or modifications. This paper is about how people should consider meeting the cooperative principle in order to perform successfully in communication which is based mainly on Paul Grice’s theory of implicature which is considered one of the most important contributions to pragmatics.

Fine Structure Constant derived from Principle Theory.

Derivation of mass (m), charge (e) and fine structure constant (FSC) from theory are unsolved problems in physics up to now. Neither the Standard Model (SM) nor the General theory of Relativity (GR) has provided a complete explanation for mass, charge and FSC. The question “of what is rest mass” is therefore still essentially unanswered. We will show that the combination of two Principle Theories, General Relativity and Thermodynamics (TD), is able to derive the restmass of an electron (m) which surprisingly depends on the (Sommerfeld) FSC (same for the charge (e)).

Calculation of the Fine Structure Constant derived from Principle Theory.

Recently we have presented in a paper that the combination of two Principle Theories, General Relativity (GR) and Thermodynamics (TD), is able to derive the restmass (m) of an electron which (surprisingly) depends on the Sommerfeld Fine Structure Constant (FSC). In this paper we present a completed calculation of the FSC number (1/α=137.035999024(9)) from a GR+TD point of view

Ethical Particularism and Morally Relevant Properties

This paper follows a path that takes us from utilitarianism to particularism. Utilitarianism is the leading one-principle theory; its falsehood is here simply asserted. W. D. Ross’s theory of prima facie duty is offered as the strongest many-principle theory. Ross’s two accounts of his notion of a prima facie duty are considered and criticized. But the real criticism of his view is that being a prima facie duty is a context-sensitive notion, since a feature that is a prima facie duty-making feature in one case may be prevented from playing that role in another. Since the strongest many-principle theory is therefore false, the only conclusion is a no-principle theory: a theory that allows moral reasons but does not suppose that they behave in the regular way required for there to be moral principles—namely, moral particularism.

Intuitionism in Meta-Epistemology

This paper is a response to a paper by Alston which attempts to bring out similarities between views in meta-ethics and views in meta-epistemology. Alston contrasts naturalist (generally causal) epistemology with normative epistemology; but there is a further, more revealing contrast concerning the number of basic epistemological principles. Naturalism is a causal form of one-principle theory, but an analogy with ethical intuitionism should allow many coordinate epistemological principles of justification. So the question at issue is the number of ethical, or epistemological, principles. If there are many ethical principles, the question is how they are known. The merits of a Ross-style epistemology with many coordinate principles are stressed, though Ross maintained that moral principles are epistemically useless. Pursuing that line, the possibility of an epistemological particularism emerges. The paper ends with a discussion of the relation between resultance and supervenience

Calculation of the Fine Structure Constant derived from Principle Theory.

Recently we have presented in a paper that the combination of two Principle Theories, General Relativity (GR) and Thermodynamics (TD), is able to derive the restmass (m) of an electron which (surprisingly) depends on the Sommerfeld Fine Structure Constant (FSC). In this paper we present a completed calculation of the FSC number (1/α=137.035999024(9)) from a GR+TD point of view.

Application of Gas Foil Bearings in China

Gas foil bearing has been widely used in high-speed turbo machinery due to its oil-free, wide temperature range, low cost, high adaptability, high stability and environmental friendliness. In this paper, state-of-the-art investigations of gas foil bearings are reviewed, mainly on the development of the high-speed turbo machinery in China. After decades of development, progress has been achieved in the field of gas foil bearing in China. Small-scale applications of gas foil bearing have been realized in a variety of high-speed turbo machinery. The prospects and markets of high-speed turbo machinery are very broad. Various high-speed turbomachines with gas foil bearings have been developed. Due to the different application occasions, higher reliability requirements are imposed on the foil bearing technology. Therefore, its design principle, theory, and manufacturing technology should be adaptive to new application occasions before mass production. Thus, there are still a number of inherent challenges that must be addressed, for example, thermal management, rotor-dynamic stability and wear-resistant coatings.

Fine Structure Constant derived from Principle Theory.

Derivation of mass (m), charge (e) and fine structure constant (FSC) from theory are unsolved problems in physics up to now. Neither the Standard Model (SM) nor the General theory of Relativity (GR) has provided a complete explanation for mass, charge and FSC. The question “of what is rest mass” is therefore still essentially unanswered. We will show that the combination of two Principle Theories, General Relativity and Thermodynamics (TD), is able to derive the restmass of an electron (m) which surprisingly depends on the (Sommerfeld) FSC (same for the charge (e)).

A GENDER-BASED ANALYSIS OF OBSERVANCE AND NON-OBSERVANCE OF CONVERSATIONAL MAXIMS IN FRONT OFFICE STAFF’S SPEECH AT RESTAURANTS IN UBUD DISTRICT

This study was intended to investigate, describe and explain how conversational maxims are observed by the Front Office staff at restaurants in Ubud when they handle table reservation and what types of non-observance are committed by the Front Office staff in observing conversational maxims. The subjects were the Front Office staff at restaurants in Ubud district. The data for this naturalistic qualitative study were collected through observation and audio-recording which were then analyzed by using Paul Grice’s (1975) Cooperative Principle theory. In this research, there were 30 conversations of taking table reservation via telephone which were conducted by the front office staff at restaurants in Ubud sub-district when they handle table reservation. Generally, both male and female front office staff produced more observance of maxims than non-observance of maxims. The highest frequency of observance and non-observance of Gricean maxims produced by male front office staff was maxim of quantity (100%), then followed by flouting of maxims (62.5%), and infringing maxims (25%). The highest frequency of observance and non-observance of Gricean maxims produced by female front office staff was maxim of quantity (100%), then followed by flouting of maxims (68.1%), and infringing of maxims (9.0%). Moreover, there was no opting out of maxims and suspending of maxims occurred in the conversation. The utterances were obtained from 30 data in restaurant setting. In general, both male and female front office staff produced more observance of maxims than non-observance of maxims.