5,658 research outputs found
Subfactor realisation of modular invariants
We study the problem of realising modular invariants by braided subfactors
and the related problem of classifying nimreps. We develop the fusion rule
structure of these modular invariants. This structure is useful tool in the
analysis of modular data from quantum double subfactors, particularly those of
the double of cyclic groups, the symmetric group on 3 letters and the double of
the subfactors with principal graph the extended Dynkin diagram D_5^(1). In
particular for the double of S_3, 14 of the 48 modular modular invariants are
nimless, and only 28 of the remaining 34 nimble invariants can be realised by
subfactors
Can Brazilian Firms Survive the Chinese Challenge: Effects of Globalization on Markets, Strategies, and Performance
Purpose – The purpose of this paper is to apply the structure-conduct-performance theory and the strategic fit concept to examine the effects of globalization on markets, strategies, and performance of business-to-consumer firms in Brazil.
Design/methodology/approach – The paper takes a qualitative approach to answer the research questions. Top decision makers such as president, chief executive officer, chairman of the board, vice president, and director of the companies were interviewed. The elite approach to in-depth interviewing was followed to obtain reliable information from the decision makers.
Findings – Findings indicate that globalization and especially the entry of Chinese firms significantly changed market contexts in Brazil. Brazilian executives responded to changes in market contexts by shifting from production to customer orientation, building brand equity, developing new products, and differentiating offerings. Overall, marketing performance of Brazilian firms was positive, but profitability suffered.
Originality/value – The study contributes to the literature by showing that globalization has changed market contexts in Brazil by developing a new form of competition in which firms from emerging economies are now competing against each other. Findings from this study can provide useful theoretical and strategic insights into the behavior and performance of firms in other emerging markets
Competitive Threats, Strategic Responses and Performance of Brazilian B2B Firms
Purpose – The economic realignment in Latin America has created two clusters, one stagnant in the north and the other growth-bound in the south. This study aims to focus on Brazil, the key player in the growth-bound southern cluster, and address three fundamental questions: how Brazilian executives in four B2B sectors (telecommunications, business equipment, steel, and transportation) viewed the internal competitive developments, how they strategically responded to these developments, and what were the marketing and financial outcomes of these strategies.
Design/methodology/approach – Data were obtained by interviewing top decision makers such as president, chief executive officer, and director of the companies.
Findings – Findings show that the intensity of competitive pressures due to globalization varied by sector and so did strategic responses of firms. Marketing and financial performance outcomes also varied by sectors.
Originality/value – The study adds to the growing literature on competitive market developments, strategic responses and performance outcomes of firms in Brazil, an important emerging economy and the key player in the southern Latin America cluster
Release profile of ibuprofen in β-cyclodextrin complexes from two different solid dosage forms
The objective of this work was to develop solid dosage forms using powders containing inclusion complexes (ibuprofen with β-cyclodextrin) which were used to produce tablets (direct compression without additional excipients) and pellets (extrusion/spheronization) from wet mass containing 40% (w/w) of microcrystalline cellulose. The pellets also demonstrated that during preparation of the wet mass, the inclusion process occurred in a same yield that when pre-complexation was used. The particles characteristics were evaluated after being obtained through different complexation methods. The results showed that the tensile strength and profile dissolution were as expected for both dosage forms. Tablets containing inclusion complexes showed higher solubility when compared with a reference formulation and with two commercial formulations. The ibuprofen released from the two pellets formulations didn’t show relevant differences between them. The drug released was analyzed considering different dissolution parameters. The advantages of these new methodologies can be summarized as: (a) tablets were produced at a lower cost for the total process; and (b) in the pellet´s preparation there was no need of the previous complexation method resulting in a decrease in time and energy required
Relativistic deuteron structure function at large Q^2
The deuteron deep inelastic unpolarized structure function F_2^D is
calculated using the Wilson operator product expansion method. The long
distance behaviour, related to the deuteron bound state properties, is
evaluated using the Bethe-Salpeter equation with one particle on mass shell.
The calculation of the ratio F_2^D/F_2^N is compared with other convolution
models showing important deviations in the region of large x. The implications
in the evaluation of the neutron structure function from combined data on
deuterons and protons are discussed.Comment: 7 pages, 1 ps figure, RevTeX source, 1 tar.gz file. Submited to
Physical Letter
Orbit Representations from Linear mod 1 Transformations
We show that every point carries a representation of a
-algebra that encodes the orbit structure of the linear mod 1 interval map
. Such -algebra is generated by
partial isometries arising from the subintervals of monotonicity of the
underlying map . Then we prove that such representation is
irreducible. Moreover two such of representations are unitarily equivalent if
and only if the points belong to the same generalized orbit, for every
and
Amenable crossed product Banach algebras associated with a class of -dynamical systems
We prove that the crossed product Banach algebra that is
associated with a -dynamical system is amenable
if is a discrete amenable group and is a commutative or finite
dimensional -algebra. Perspectives for further developments
are indicated.Comment: Improved discussion of the relation with the existing literature and
of perspectives for further developments. 8 pages. To appear in Integral
Equations and Operator Theor
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