4,142 research outputs found
2HDM without FCNC: off the beaten tracks
We propose an alternative method of constructing two Higgs-doublet models
free from scalar mediated FCNC couplings at the tree-level. In a toy scenario,
we have presented semi realistic textures for the Yukawa matrices, which can
reproduce the approximate flavor structure in the quark sector. Presence of
flavor diagonal but nonuniversal Yukawa couplings emerges as a distinguishing
feature of such models.Comment: 8 pages, no figures, minor clarifications added, version accepted for
publication in EPJ
Chromosomal mutational algebra: a new algebra to manipulate chromosomal mutation
This study leads to a new algebra. An algebra is defined on the common mechanisms of chromosomal mutation. The algebra (_S^[PSI](C)_^, ~*~, ', [DELTA], _D_) is constructed for a given _C_ and [PSI]. This algebra represents the most common chromosomal mutational mechanisms. This can lead to a new way to manipulate chromosomal mutation with higher structures of abstract mathematics. The first proposal of the algebra was reported in Mazumdar _et al._, 2007
Asymptotic linear bounds of Castelnuovo-Mumford regularity in multigraded modules
Let be a Noetherian standard -graded algebra over an Artinian
local ring . Let be homogeneous ideals of and a
finitely generated -graded -module. We prove that there exist
two integers and such that \mathrm{reg}(I_1^{n_1} \cdots I_t^{n_t}
M) \leq (n_1 + \cdots + n_t) k + k'
\quad\mbox{for all }~n_1,\ldots,n_t \in \mathbb{N}. Comment: 9 page
Flat Spectrum Gamma Ray Burst Afterglows
Temporal behaviour of GRB afterglow light curve is derived for the case where
the electron energy distribution is relatively flat, with the power-law index p
lying between 1.0 and 2.0. It is shown that the expected behaviour will be the
same as that for p>2.0 if the upper cutoff in the electron energy distribution
evolves in direct proportion to the bulk Lorentz factor of the blast wave.Comment: 8 pages, uses basi.sty (included). Revised according to referees'
comments. Added discussion on Dai & Cheng (2001) astro-ph/0105055. Accepted
for publication in Bull. Astr. Soc. Indi
Energy management in 21st century: an inquiry into the mounting corporate hegemony over basic human necessities and the role of civil society as a countervailing force.
In 21st century, as energy and food supplies are increasingly becoming dependent on each other, any strategy to manage these two basic human needs should be formulated collectively –not in isolation. The ‘green revolution’ of 1950s paved the way for ascertaining corporate control on food and water. Through the enactment and subsequent ratification of Kyoto Protocol, the corporate hegemony on air and energy has been established firmly. During last hundred and fifty odd years, a symbiotic relationship between the state and large corporations was developed. The transnational corporations are trying to break away from such dependence on state and emerge as the dominant force to control and manage the global market. This study tries to explain the consequences of this changing relation between the ‘state’ and ‘corporations’ on the food and energy needs of the citizens. It also analyses various issues pertaining to the energy supplies during the next few decades of the 21st century. The paper concludes that in future, the civil society organizations (CSOs) will play an important role in steering the course of society especially in the allocation and distribution of basic human necessities like food and energy.Electricity retailing; food retailing, renewable energy; decentralized generation; civil society; multilateral organization; small and micro enterprise (sme), SMEs
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