Co-design of output feedback laws and event-triggering conditions for linear systems

We present a procedure to simultaneously design the output feedback law and the event-triggering condition to stabilize linear systems. The closed-loop system is shown to satisfy a global asymptotic stability property and the existence of a strictly positive minimum amount of time between two transmissions is guaranteed. The event-triggered controller is obtained by solving linear matrix inequalities (LMIs). We then exploit the flexibility of the method to maximize the guaranteed minimum amount of time between two transmissions. Finally, we provide a (heuristic) method to reduce the amount of transmissions, which is supported by numerical simulations

The Causes for Asylum, the Rights and Obligations of Refugees in International law

Due to the increasing number of refugees, the increase in their suffering, the importance which they represents, and their need for an assistance and ensuring their rights stipulated by the agreements and international treaties in international law to secure the protection and shelter for them; the current research came to detect the reasons that force the refugees to asylum, as well as to display the rights and duties stipulated by the agreements and international conventions. In order to achieve the objectives of the research; the researcher used the inductive analytical approach by referencing to the legal books and the Arab and Foreign studies that dealt with this topic. In addition, the researcher refers to the declarations, conventions and international covenants on human rights in general and on asylum in particular, and the review and analysis of data and reports. The researcher has concluded that asylum is a contract, which includes many conditions that ensure its validity,  and it is possible to dissolute it if the refugee has issued any acts that contrary to the laws of the host country or if the refugee did not perform the duties imposed on him/her. As well as, asylum is humanitarian situation that calls for states to intervene to help refugees. In addition, the researcher found that the general principles of the protection of refugee rights in international law in general proved to be valid for every time and place. In order to overcome the vulnerabilities associated with the issue of refugees, the researcher propose several recommendations, including; states must adopt new concepts and proposals that raise the human niche, issuance of new laws that aim to protect refugees and not to protect certain people or certain interests, the imposition of prior commitments to the states towards refugees, the demand to enable refugees to exercise various rights and freedoms set forth in international covenants and agreements especially in the time that there are many violations against refugees, and there should be a new realisation aimed to addressing the issue of refugees in an integrated manner. As well as, the researcher highlighted the importance of increasing the awareness of the refugees regarding their rights and their duties. Keywords: Asylum, Rights, Obligations, Refugees, International la

MAX-consensus in open multi-agent systems with gossip interactions

We study the problem of distributed maximum computation in an open multi-agent system, where agents can leave and arrive during the execution of the algorithm. The main challenge comes from the possibility that the agent holding the largest value leaves the system, which changes the value to be computed. The algorithms must as a result be endowed with mechanisms allowing to forget outdated information. The focus is on systems in which interactions are pairwise gossips between randomly selected agents. We consider situations where leaving agents can send a last message, and situations where they cannot. For both cases, we provide algorithms able to eventually compute the maximum of the values held by agents.Comment: To appear in the proceedings of the 56th IEEE Conference on Decision and Control (CDC 17). 8 pages, 3 figure

Proyecto de traducción

Traducción de un capítulo de la novela que da título al trabajo. Novela histórica de reciente publicación del escritor egipcio Ahmad Amín

Tesis doctorales acerca de Ibn al-Jaṭīb presentadas en España

Analyses the doctoral theses on Ibn al-Jaṭīb, a notable writer and politician, submitted to Spanish universities during the 20th century and up to the present. Biblio- graphic data  are  arranged by name of candidates and include title, institution, year and name of the director, as well as information on publication, if available. Content of the dis- sertations in relation to the works of Ibn al-Jaṭīb covered is reviewed, together with refer- ences and commentary on the group of theses as a whole and on the universities where they were submitted.Este artículo pretende analizar las Tesis Doctorales presentadas en Universidades españolas sobre la figura de Ibn al-Jaṭīb, gran escritor y político, durante el siglo XX y hasta la actualidad. Presento una relación de las Tesis Doctorales, de cuyos datos he podido disponer, presentadas en Universidades españolas. Están ordenadas  por el nombre del Doctorando, indicando título de la Tesis, lugar de su presentación, año y nombre del director de la misma. A continuación comento el contenido de la Tesis, en referencia a la obra de Ibn al-Jaṭīb sobre la que se trate. También señalo si han sido publicadas o siguen inéditas. Así mismo se añaden  algunos comentarios sobre cada Tesis. Finalmente ofrezco algunas referencias y explicaciones de conjunto, sobre las Universidades respectivas en que fueron presentadas. Para terminar se incluye un ANEXO con trabajos universitarios de Tesinas y similares, en relación con Ibn al-Jaṭīb

Quantum rotation gates with controlled nonadiabatic evolutions

Quantum gates can be implemented adiabatically and nonadiabatically. Many schemes used at least two sequentially implemented gates to obtain an arbitrary one-qubit gate. Recently, it has been shown that nonadiabatic gates can be realized by single-shot implementation. It has also been shown that quantum gates can be implemented with controlled adiabatic evolutions. In this paper, we combine the advantage of single-shot implementation with controlled adiabatic evolutions to obtain controlled nonadiabatic evolutions. We also investigate the robustness to different types of errors. We find that the fidelity is close to unity for realistic decoherence rate

Voice restoration following total laryngectomy by tracheoesophageal prosthesis: Effect on patients' quality of life and voice handicap in Jordan

<p>Abstract</p> <p>Background</p> <p>Little has been reported about the impact of tracheoesophageal (TE) speech on individuals in the Middle East where the procedure has been gaining in popularity. After total laryngectomy, individuals in Europe and North America have rated their quality of life as being lower than non-laryngectomized individuals. The purpose of this study was to evaluate changes in quality of life and degree of voice handicap reported by laryngectomized speakers from Jordan before and after establishment of TE speech.</p> <p>Methods</p> <p>Twelve male Jordanian laryngectomees completed the University of Michigan Head & Neck Quality of Life instrument and the Voice Handicap Index pre- and post-TE puncture.</p> <p>Results</p> <p>All subjects showed significant improvements in their quality of life following successful prosthetic voice restoration. In addition, voice handicap scores were significantly reduced from pre- to post-TE puncture.</p> <p>Conclusion</p> <p>Tracheoesophageal speech significantly improved the quality of life and limited the voice handicap imposed by total laryngectomy. This method of voice restoration has been used for a number of years in other countries and now appears to be a viable alternative within Jordan.</p

A new natural pyrrolone from the Egyptian Ageratum species

Ageratum conyzoides L., is an annual herb with a long history of traditional medicinal uses in many countries in the world, especially in the tropical and subtropical regions. A wide range of chemical compounds including alkaloids, flavonoids, chromenes, benzofurans and terpenoids have been isolated from this species. Extracts and metabolites from this plant have been found to possess pharmacological and insecticidal activities. In continuation of our interest in the Egyptian medicinal plants, the reinvestigation of the methylenechloride extract of the air-dried aerial parts of Ageratum conyzoides afforded a new natural compound 1, pyrrolone, 5-ethoxy-1H-pyrrol-2(5H)-one, together with a known flavonoid. The structures of the compounds were determined by comprehensive NMR studies, including DEPT, COSY, HMQC, HMBC, and MS