OALib Journal期刊

ISSN: 2333-9721



匹配条件: “Maral Mostafazadehfard” ,找到相关结果约36条。
Homaloidal determinants
Maral Mostafazadehfard,Aron Simis
Mathematics , 2014,
Abstract: A form in a polynomial ring over a field is said to be homaloidal if its polar map is a Cremona map, i.e., if the rational map defined by the partial derivatives of the form has an inverse rational map. The object of this work is the search for homaloidal polynomials that are the determinants of sufficiently structured matrices. We focus on generic catatalecticants, with special emphasis on the Hankel matrix. An additional focus is on certain degenerations or specializations thereof. In addition to studying the homaloidal nature of these determinants, one establishes several results on the ideal theoretic invariants of the respective gradient ideals, such as primary components, multiplicity, reductions and free resolutions.
Cohomological dimension and arithmetical rank of some determinantal ideals
Davide Bolognini,Alessio Caminata,Antonio Macchia,Maral Mostafazadehfard
Mathematics , 2015,
Abstract: Let $M$ be a $(2 \times n)$ non-generic matrix of linear forms in a polynomial ring. For large classes of such matrices, we compute the cohomological dimension (cd) and the arithmetical rank (ara) of the ideal $I_2(M)$ generated by the $2$-minors of $M$. Over an algebraically closed field, any $(2 \times n)$-matrix of linear forms can be written in the Kronecker-Weierstrass normal form, as a concatenation of scroll, Jordan and nilpotent blocks. B\u{a}descu and Valla computed $\mathrm{ara}(I_2(M))$ when $M$ is a concatenation of scroll blocks. In this case we compute $\mathrm{cd}(I_2(M))$ and extend these results to concatenations of Jordan blocks. Eventually we compute $\mathrm{ara}(I_2(M))$ and $\mathrm{cd}(I_2(M))$ in an interesting mixed case, when $M$ contains both Jordan and scroll blocks. In all cases we show that $\mathrm{ara}(I_2(M))$ is less than the arithmetical rank of the determinantal ideal of a generic matrix.
Effects of humic acid foliar spraying and nitrogen fertilizer management on yield of peanut (Arachis hypogaea L.) in Iran
Maral Moraditochaee
Journal of Engineering and Applied Sciences , 2012,
Abstract: In order to study effects of humic acid foliar spraying and nitrogen fertilizer management on yield and yield components of peanut (Arachis hypogaea L.). An experiment in factorial format based on randomized complete block design with three replications, during 2011 year in Astaneh Ashrafiyeh (north of Iran) was conducted. Factors of experiment includes two levels of foliar humic acid spraying (H1: 0 (control) and H2: 40 mg/l) and four levels of nitrogen fertilizer levels consist of (n1: 0 (control), n2: 25 kg/ha, n3: 50 kg/ha, n4: 75 kg/ha pure nitrogen from source of urea). In maturity time, seed yield, straw yield, biological yield and harvest index were measured. Effects of humic acid foliar spraying and nitrogen management on all traits were significant at 1% probability level. Interaction effect of humic acid and nitrogen management on seed yield, straw yield and harvest index showed significant differences at 5% probability level. Also, on biological yield was non significant. With attention to results of experiment, with increase nitrogen application up to 75 kg/ha all studied traits were increased. In all measured traits, the treatment of 40 mg/l humic acid foliar spraying was superior.
Factors Affecting Participation in Population-Based Mammography Screening
Trakya Universitesi Tip Fakultesi Dergisi , 2010,
Abstract: Objectives: This study aims to investigate the demographic or risk factors affecting participation in a population-based breast screening with mammography program in a rural area of Turkey.Patients and Methods: This definitive epidemiological study was carried out between December 2002 and August 2003, in a town of Ankara. Of the 784 women, 710 were interviewed and 462 (58.9%) of them participated in the screening. A questionnaire was used for collecting data.Results: The mean age of the women was 50.7±10.0 years. Fifty four percent of the single, widowed or divorced women (p=0.001), 62.5% of those aged 60 years or older (p<0.001), and 42.8% of the illiterate or literate women (p<0.001) did not participate the screening. Women, who were elder had a 1.1-fold greater risk of nonparticipation in mammography screening than younger ones (95% confidence interval, 1.04-1.09), and those who were postmenopausal had 1.5-fold greater risk than those who were premenopausal (95% confidence interval, 1.04-2.22).Conclusion: Age, marital, educational and menopausal statuses seem to be effective on participation in the population-based study. Screening programs should be planned considering these factors.
The impact of EU accession on rights of national minorities in Romania
Cinq Continents , 2012,
Abstract: The collapse of communism has had an enormous influence on the development of Central and Eastern European states. Although, the transition period in these countries was accompanied by several distinctive features, all these states had a general orientation to the west. This was the case in Romania too, which saw transition to democracy as a “return to Europe”, and specifically accession to the European Union. The author strongly believes that the leitmotif of democratic transformations in Romania is its orientation and accession to the European Union, which is why the author will investigate its impact on constitutional reforms in the country. However, it is beyond the framework of this article to cover all areas of social, political and economic life of Romania, where there have been significant changes as a result of the EU’s influence, so I have focused only on minority rights, as this issue is very important for maintaining stability and democracy in the region.
Pouvoir et religion à la chapelle royale de Versailles sous Louis XIV Power and religion at the royal chapel of Versailles under Louis XIV
Alexandre Maral
Bulletin du Centre de recherche du chateau de Versailles , 2007, DOI: 10.4000/crcv.275
Abstract: D’une manière peut être plus sensible que partout ailleurs, les objets et les insignes du pouvoir prennent une importance particulière dans le contexte du cérémonial liturgique de la religion catholique. à la chapelle royale de Versailles, la présence régulière du monarque et de sa cour complique encore la situation, d’autant que la desserte est assurée par deux corps distincts d’ecclésiastiques. Dépassant le simple cadre des préséances, Louis XIV a défini autour de sa personne royale un système rituel susceptible d’en manifester le caractère épiscopal dérivé du sacre. De même, l’enjeu juridictionnel représenté par la Chapelle royale se traduit par un jeu subtil d’attitudes, de gestes et de rites, chorégraphie sacrée qui accompagne et exprime les revendications des partisans et des adversaires de l’exemption du lieu de culte royal au regard du diocèse de Paris. Ce discours trouve un écho partiel dans le programme décoratif de la chapelle définitive du palais, achevée en 1710. Objects and symbols of power take on a particular importance in the liturgical ceremony of the Catholic Church, perhaps more so than in any other context. At the royal chapel of Versailles, the regular presence of the king and his court complicated the situation further, all the more so in that religious ceremony was administered by two distinct ecclesiastic bodies. Beyond the rules of precedence, Louis XIV had introduced around his royal persona a system of ritual that would manifest the episcopal identity conferred upon him by his coronation. Similarly, the jurisdictional authority represented by the royal chapel was conveyed in a subtle play of attitudes, gestures and rites, a symbolic choreography that accompanied and expressed the claims of the partisans and adversaries of the exemption of the royal place of worship with regard to the diocese of Paris. This stance was reflected in the decorative scheme of the palace’s final chapel, completed in 1710.
Numerical Solution of Stochastic Hyperbolic Equations
Necmettin Aggez,Maral Ashyralyyewa
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/824819
Abstract: A two-step difference scheme for the numerical solution of the initial-boundary value problem for stochastic hyperbolic equations is presented. The convergenceestimate for the solution of the difference scheme is established. In applications, the convergence estimates for the solution of the difference scheme are obtained for different initialboundary value problems. The theoretical statements for the solution of this differencescheme are supported by numerical examples.
Development of post-communist parliamentarism in Kazakhstan and Romania: a comparative analysis
Cinq Continents , 2011,
Abstract: This study compares institutional development of legislative bodies in post-communist Romania and Kazakhstan. Despite having shared a communist past experience, Kazakhstan and Romania have followed a quite different path in their post-communist political order: Kazakhstan is unwillingly accepted the break-up of the Soviet Union in 1991 and peacefully declared its independence, while Romanian Revolution of 1989 was the most bloody of all in East Central Europe. However, in spite of their geographical remoteness, different cultural and historical backgrounds, various ethnic and religious compositions, as well as different economic profiles, Romania and Kazakhstan have shared some common elements of communist legacy and its side-effects during the post-communist development of political institutions. It does not necessarily mean that their respective experiences with communist rule and transition to democracy were the same. The parliamentary development in the two countries differs from each other, both in terms of stability and the level of institutionalization. The goal of this article is twofold. First and foremost aim of the paper is to explain parliamentary development in post-communist Romania and Kazakhstan from historical point of view and to identify what contributes to changes and different outcomes in legislatures of the respective countries. Second goal is to compare two parliaments and identify similarities and differences with making some inferences about the strength of legislatures compared to each other and to other major political institutions.
Political representation of ethnic minorities in the Republic of Kazakhstan
Cinq Continents , 2011,
Abstract: The article is devoted to the investigation of the politicalrepresentation of different ethnic groups in multinational Kazakhstan. With gaining the independence, the Republic became home to more than 100 nations, which in turn raise the question of their equal representation in political and social spheres. The general theory on political representation, which was developed in the political literature, is investigated in the article.However, the work is mainly focused on the opportunities for all citizens’ representation, where the legal basis and the political context in the society play a crucial role. For that purpose the Political Opportunity Structure approach is seen as the most suitable, while the special attention is given to the analysis of three components of this method – electoral system, citizenship regime and political party.
Osseous Metaplasia in Castleman's Disease: A Case Report
Maral Mokhtari,Perikala Vijayananda Kumar
Case Reports in Medicine , 2012, DOI: 10.1155/2012/674870
Abstract: Background. Castleman's disease is a benign lymphoproliferative disorder. The disease may be localized or multicentric. Three histologic variants are recognized: hyaline vascular, plasma cell, and mixed types. Case. A 20-year-old man presented with large left axillary mass. The histologic examination of the resected mass showed follicular pattern with large nodules of mantle cells arranged concentrically around atrophic and vascularized germinal centers. There was also some benign-appearing bone trabeculae interspersed with lymphoid tissue. The diagnosis of Castleman's disease, hyaline-vascular type with osseous metaplasia, was made.

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