8,597 research outputs found

    Infrared stability of ABJ-like theories

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    We consider marginal deformations of the superconformal ABJM/ABJ models which preserve N=2 supersymmetry. We determine perturbatively the spectrum of fixed points and study their infrared stability. We find a closed line of fixed points which is IR stable. The fixed point corresponding to the ABJM/ABJ models is stable under marginal deformations which respect the original SU(2)xSU(2) invariance, while deformations which break this group destabilize the theory which then flows to a less symmetric fixed point. We discuss the addition of flavor degrees of freedom. We prove that in general a flavor marginal superpotential does not destabilize the system in the IR. An exception is represented by a marginal coupling which mixes matter charged under different gauge sectors. Finally, we consider the case of relevant deformations which should drive the system to a strongly coupled IR fixed point recently investigated in arXiv:0909.2036 [hep-th].Comment: 1+11 pages, 4 figures; v2: minor correction

    Entire hemithorax irradiation for Masaoka stage IVa thymomas

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    Thymomas are rare neoplasms that have an indolent growth with a preferentially intra-thoracic dissemination pattern. Surgery is currently the standard treatment of thymomas; however radiotherapy is often used in an adjuvant setting due to a high sensitivity of these tumors to such treatment. Postoperative entire hemithoracic irradiation has been used in selected Masaoka stage IVa cases after complete surgical excision of metastatic lesions. In the present article, the authors report three cases of Masaoka stage IVa thymoma that underwent entire hemithorax irradiation after surgical excision of metastatic lesions. The first two patients presented as stage IVa thymomas. The third case consisted of a pleural recurrence of a thymoma. Hemithoracic irradiation with low doses has been used by different authors; the available data shows that it is a well-tolerated treatment that could potentially lead to better loco-regional control and increased overall survival

    Quasi-Linear Differential-Deference Game of Approach

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    This is a post-peer-review, pre-copyedit version of a book chapter that is part of “V. A. Sadovnichiy, M. Z. Zgurovsky (eds.). Modern Mathematics and Mechanics. Understanding Complex Systems”. The final authenticated version is available online at: https://link.springer.com/chapter/10.1007/978-3-319-96755-4_26The paper is devoted to the games of approach. We consider a controlled object whose dynamics is described by the linear differential system with a pure time delay or the differential-difference system with commutative matrices in Euclidean space. The approaches to the solutions of these problems are proposed which based on the Method of Resolving Functions and the First Direct Method of L.S. Pontryagin. The guaranteed times of the game termination are found, and corresponding control laws are constructed. The results are illustrated by a model example

    Characterization and Organic Compounds in Peloids from Mongolia

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    The peloids are the important natural remedy all over the world. The physicochemical properties and some organic matters of peloids from 12 lakes in Mongolia were examined. These peloids belong to the continental hydrosulfide sticky peloid except Gurvan nuur peloid. Peloid from Lake Gurvan nuur was classified as a sapropel with high ash content.The peloid organic matters were investigated using chemical analysis and several analytical techniques, such as IR, and 13C NMR spectroscopy, GC/MS, gas chromatography. The concentration of total organic carbon in all continental hydrosulfide sticky peloids is ranged from 0.4% to 3.1%, but 15.3% in the sapropel. It shows that the majority of the peloids in Mongolia are hydrosulfide sticky peloid with lower organic matters than the sapropel and peat. In this study, no significant difference of chemical composition was observed between dissoluble and insoluble organic matters from peloids. Some classes of biomolecules, including lipid and carbohydrate, were identified. Biogenic stimulator humic acid (HA) is the major part of the peloid organic matter. HA concentration varied between 11.2% and 55.9% of total organic matter of peloids. The macromolecule of the sapropel HA exhibited a lower aromatization degree and more functional groups than other HAs, as revealed by the 13C NMR data and C/H ratio. The genesis of peloid organic matter is discussed in this paper.Our results suggest that the presence of known bioactive organic compounds, such as humic acid, lipid, and carbohydrate, as well as hydrogen sulfide causes the balneological value of peloids in Mongolia.DOI: http://dx.doi.org/10.5564/pmas.v0i4.42Proceedings of the Mongolian Academy of Sciences 2009 No 4 pp.3-2

    Evaporation induced flow inside circular wells

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    Flow field and height averaged radial velocity inside a droplet evaporating in an open circular well were calculated for different modes of liquid evaporation.Comment: 5 page, 3 figures, submitted to European Physical Journal

    On the infrared behaviour of 3d Chern-Simons theories in N=2 superspace

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    We discuss the problem of infrared divergences in the N=2 superspace approach to classically marginal three-dimensional Chern-Simons-matter theories. Considering the specific case of ABJM theory, we describe the origin of such divergences and offer a prescription to eliminate them by introducing non-trivial gauge-fixing terms in the action. We also comment on the extension of our procedure to higher loop order and to general three-dimensional Chern-Simons-matter models.Comment: 26 pages, 6 figures, JHEP3; v2: minor corrections and references added; v3: introduction expanded, presentation of section 3.3.1 improved, references added, version to appear in JHE

    Phylogenetic relationship among Kenyan sorghum germplasms based on aluminium tolerance

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    Eighty nine (89) sorghum lines sourced from various parts of Kenya were used to determine phylogenetic relationships based on 10 DNA fragments at AltSB loci with SbMATE, ORF9 and MITE primers. Nine lines of varying aluminium tolerance levels were selected to compare their SbMATE gene expression via the real-time PCR quantification of SbMATE gene expression. The sorghum line MSCR O2 expressed a thousandfold more SbMATEgene activity than the sensitive lines (MSCRM49, MSCRN84 and MSCRN61) under Al treatment. Analysis was done by agarose gel electrophoresis stained with ethidium bromide. The objective of this study was to assess the level of phylogenetic relationships among the Kenyan sorghum germplasms at a known Al tolerance locus. Hierarchical cluster analysis joined at 70% simple matching coefficient using average linkage similarity level produced nine groups in which 67 lines fell in three major clusters of 39, 15 and 13 lines each. The three Al tolerant lines MSCRO2, MSCRC1 and MSCRN60 were clustered together. Lines MSCRO2, MSCRC1 and MSCRN60, screened to be Al tolerant were genetically related at 70% average linkage similarity level and therefore recommend their further development as a food security measure in Kenya.Keywords: Aluminium (Al) toxicity, Sorghum bicolor, Sorghum bicolor multi-drug, toxic extrusion compound (SbMATE) gene expressionAfrican Journal of Biotechnology Vol. 12(22), pp. 3528-353
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