wolfgang Rihm premiered his latest opera (Dionysus) on 2010. In this fantasy, Rihm has innovatively combined Greek Myths with Nietzsche’s controversial life events and thoughts in a surprisingly delusional manner. The libretto is drawn from the text of Nietzsche's Dionysian-Dithyrambs – the philosopher's final confrontation with the ecstatic god of his own aesthetic theories. Rihm in Dionysus opera utilizes music and orchestral excitations, different types of symbols in stage design and manipulated libretto, in order to express his philosophical perception of Nietzsche’s thoughts. Authors of the present manuscript have previously assessed the libretto and symbols used in the Dionysus opera in a separate study entitled "An analysis of Dionysus opera by Wolfgang Rihm, storytelling and choice of symbols". This paper studies mainly Rihm’s composing techniques and his attitude toward musical components specifically in the music of Dionysus opera. Rihm’s music is a combination of contemporary techniques incorporated with Mahler and Schoenberg’s agitated passions which were well appreciated by his contemporaries as a movement against Boulez and Stockhausen’s avant-gardism. In 1970, he was considered as a pioneer of the movement known as "new simplicity". Composers who joined this movement, strove for an immediacy between the creative impulse and the musical result (in contrast to the elaborate pre-compositional planning characteristic of the avant-garde), with the intention also of communicating more readily with audiences. In some cases, this meant a return to the tonal language of the 19th century as well as to traditional forms and instrumental combinations which had been avoided for the most part by the avant-garde. Among the composers most closely identified with this movement, only Wolfgang Rihm has established a significant reputation outside Germany. Rihm’s music shows a tendency towards late-romantic music and prominent composers including Wagner, Strauss, Mahler and Berg. His compositional thoughts have remained unchanged throughout his career. He describes each of his works as "free-standing part of a kind of work in progress". Regardless of the medium utilized (large orchestra, small ensemble or solo instruments), Rihm astonishingly manipulates sound characteristics. Meanwhile, he develops a unique personal definition of musical elements and concepts including sound space, sound sign and generative pole which are discussed in this manuscript. Since he has a specific method to progress a musical idea, Rihm’s music cannot easily be categorized using traditional formal perspectives; this does not imply that his works are completely formless. The sense of progression in his music is not regarded as "development", because development in its traditional meaning sustains a thematic root which is normally applicable to a distinct part of a piece. This study mainly focuses on generative poles, which Rihm has embedded in music of Dionysus. To achieve this goal, authors partially benefited from an article by Richard McGregor, entitled "Interpreting compositional process in Wolfgang Rihm’s Chiffre cycle". In addition, other important components of his music such as rhythm, meter, tempo, orchestration and instrumentation are briefly mentioned and finally his attractive glimpse at tonal music (a tonality that appears and fades away like a phantom) is discussed.

Li2TiO3 as a tritium breeder has a significant role in nuclear fusion reactors. The aim of this study was the synthesis of Li2TiO3 powder by solution combustion in the explosive mode as an inexpensive and efficient method. Fuel type and nitric acid, as an oxidizer, have vital roles in this method. Hence, the effect of nitric acid content and citric acid, glucose, and glycine fuels were investigated. Results showed that the use of glucose fuel was not appropriate, because the combustion didn't occur, neither the desired phase was not synthesized. Moreover, synthesis in the presence of glycine fuel led to the synthesis of the desired product, however, no pure single-phase product was obtained. Contrary to the two mentioned fuels, citric acid was a suitable fuel for the synthesis of Li2TiO3 by solution combustion method, which resulted in a single-phase product. The optimum amount of nitric acid was determined to be 9 liters per mole of fuel. Using more than the optimal amount of nitric acid also resulted in LiTiO2 impurities being left. While using less than the optimal amount resulted in an incomplete combustion reaction.

Antarctic is one of the few regions on the Earth whose issues (particularly its legal issues) have not been adequately addressed and examined in the past decades for various reasons, including due to its geographical and natural location as a remote area. Notwithstanding, the new changes and developments occurred in the international community in the recent decades have demonstrated that there is no longer any area on the Earth towards which the world's countries may be indifferent. In particular, the unique characteristics of the Antarctic have made it an area which has a special situation in the view of the world's countries, especially developing countries. This is why the examination of the legal issues related to the Antarctic and the analysis of its existing legal regime are important.Although the presence of explorers in the Antarctic in the recent centuries and such justifications as adjacency have been used by a few states to claim territories in the Antarctic, the status of the Antarctic is so unique that it can be considered in the category of the areas recognized by international community as areas subject to the legal regime of common heritage of mankind (the areas such as the seabed and subsoil of the high seas and outer space). Accordingly, this paper analyses the status of the Antarctic and its legal regime and argues that, considering the unique characteristics of the Antarctic, it has the potential to be recognized by the international community as an area of common heritage of mankind. As a conclusion, the Antarctic can be subject to the legal regime arising from the concept of common heritage of mankind or a modified approach towards the common heritage of mankind in a way to meet the interests of the claimant states on one side and the international community on the other.

Letters are one of the important types of Persian literature and types of prose that have been of great literary, social, historical and political importance in different historical periods. Islamic mystics, using the art of writing and following the religious leaders, have written letters to convey mystical teachings and guide seekers of the path. Abdullâh Qutb is one of the prominent mystics of the ninth century AH who established the ideal society and utopia called "Exvânâbâd" near Jahrom. Through writing letters, he managed this ideal society and guided and educated his followers; Writings that are noteworthy both in terms of Persian prose and in terms of containing valuable mystical points for the guidance and education of seekers. Accordingly, in this paper, the structure of Qutb's epistels have been studied by analytical-descriptive method. The research findings indicate that the stylistic features of Qutb's writing, i.e. the tendency to simplify and brevity, have changed the structure of his writings and this has caused the difference between the letters of Qutb and other mystical writings. These letters are among the brotherly epistels and multi-faceted letters.

Letters are one of the important types of Persian literature and types of prose that have been of great literary, social, historical and political importance in different historical periods. Islamic mystics, using the art of writing and following the religious leaders, have written letters to convey mystical teachings and guide seekers of the path. Abdullâh Qutb is one of the prominent mystics of the ninth century AH who established the ideal society and utopia called "Exvânâbâd" near Jahrom. Through writing letters, he managed this ideal society and guided and educated his followers; Writings that are noteworthy both in terms of Persian prose and in terms of containing valuable mystical points for the guidance and education of seekers. Accordingly, in this paper, the structure of Qutb's epistels have been studied by analytical-descriptive method. The research findings indicate that the stylistic features of Qutb's writing, i.e. the tendency to simplify and brevity, have changed the structure of his writings and this has caused the difference between the letters of Qutb and other mystical writings. These letters are among the brotherly epistels and multi-faceted letters.

Polar diagram is a generalization of Voronoi diagram in which the angle is used as the metric. This Problem has many applications in visibility, image Processing, telecommunication, antenna, and Path Planning Problems. In recent years two kinds of Polar diagram have been proposed and appropriate algorithm have been Presented for some types of sites. Also, some algorithms has presented for kinetic data and dynamic states. In this Paper, it is assumed that the Pole is moving and an algorithm is presented that updates near Pole Polar diagram of sites with moving pole efficiently and in a sub linear time. In this approach, the Preprocessing time is 〖 O(n^4 log〗 _2⁡ 〖 n)〗 and updating time for diagram with each successive movement is 〖 O(log〗 _2⁡ 〖 n +k)〗 that k is the number of sites in region T which its site’ s regions may be changed.

Mohammad Qutb was a member of Egyptian Ikhwan-al-Moslemin who tried to join the Ikhwani and Wahhabi thoughts after immigrating to Saudi Arabia. One of his thoughts was his special view about history of Islam. He saw history of Islam as a tool to realize the real Islam. He criticized the old historical methods of Muslim historians and specially rejected orientalists’ works as easterns’ plots against Islam but he couldn’t prove this charge against them. In spite of Qutb’s claims in the necessity of new look to history of Islam and his emphasis in his unique view about it, actually he does not have any special view in this field and his writings are the repetition of the old historical views of Sunni Muslims. By evaluating his historical views in this research, it was known that his conclusions based on incorrect or insufficient data and his reasoning were not strong enough.