3,830 research outputs found
The Effects of Grass Carp on Aquatic Plants, Plankton and Benthos in Ponds
The effects of the grass carp (Ctenopharyngodon idella
Val.)on aquatic plant biomass, water quality, phytoplankton, chlorophyll a, zooplankton and benthic fauna were investigated
between May and September 2000 in earthen ponds at Cifteler-
Sakaryabasi Aquaculture and Research Station. (PDF has 8 pages
e^+e^-\to (h A)\to bbbb in Abelian Extended Supersymmetric Standard Model
We discuss the cross section in an Abelian
extended SM. We work in that minimum of the scalar potential for which Higgs
trilier coupling is greater than the soft mass parameters. We find that
nex-to-lightest Higgs gives the essential contribution to the cross section in
the small mixing angle and leptophobic limit.Comment: 13 pages, 1 postscript figur
One-Loop Effects in Supergravity Models with an Additional U(1)
For an Abelian extended Supergravity model, we investigate some important low
energy parameters: \tan\beta, Z-Z' mixing angle, lightest CP-even Higgs mass
bound, Z' mass, and effective \mu parameter. By integrating the RGE's from
string scale down to the weak scale we constuct the scalar potential, and
analyze the quantities above at the tree- and one-loop levels by including the
contributions of top squarks and top quark in the effective potential. PACS:
04.65.+e, 12.60.JvComment: 16 pages, 6 postscript figure
Q-ball formation in the MSSM with explicit CP violation
Q-balls generically exist in the supersymmetric extensions of the standard
model. Taking into account the additional sources of CP violation, which are
naturally accomodated by the supersymmetric models, it is shown that the Q-ball
matter depends additively on individual CP phases, whereas mass per unit charge
in the Q-ball depends only on the relative phases. There are regions of the
parameter space where there is no stable Q-ball solution in the CP-conserving
limit whereas finite CP phases induce a stable Q-ball.Comment: 6 p
Sentimental Herding in Borsa Istanbul: Informed versus Uninformed
Cataloged from PDF version of article.This study searches for sentimental herding in Borsa Istanbul (BIST) using a state-space model for two distinct groups of investors/traders. We expect to find no sentimental herding in BIST30 as the investors are closely following the market, given their access to maximum amount of information and high quality of guidance from the world-known intermediaries that reduce information asymmetries. However, as the SNM investors are mostly local investors with smaller assets and with higher level of information asymmetry, we expect to find evidence of sentimental herding. As expected, we find no evidence of herding by the BIST30 investors from 2000 to 2013. In contrast, our findings provide evidence that the SNM investors demonstrate sentimental herding persistently and independently from market fundamentals in three stages: evidence of herding in the first stage (2000-2004), a 4-year (2005-2008) no-herding calm period and finally a volatile adverse herding pattern (2009-2013) where fundamentals about the firm values became more important. © 2014 Taylor & Francis
Pediatric paraspinal penetrating sewing needle
Pediatric spinal injuries are very rare conditions and account for 1%-10% of all spinal injuries Domestic accidents, such as falling and bumping, are frequent events during childhood.In this study, a 1-year-old boy who was under treatment due to a penetrating trauma at the posterior thoracolumbar intersection is presented. The patient was referred to our clinic after a needle became impaled into his back due to an accident that occurred at home. The patient’s neurologic assessment was normal. A radiologic study of the patient showed the presence of a metallic foreign object, extending into the paravertebral muscle on the left side of the T12-L1 intersection. The needle was removed promptly after an emergent surgical procedure. No any complications were present during the follow-up visit after 1 month. Emergent surgical intervention is necessary in paraspinal and spinal penetrating traumas. © 2015, Yuzuncu Yil Universitesi Tip Fakultesi, Universitas Indonesia. All rights reserved
Neutrino Masses and the Gluino Axion Model
We extend the recently proposed gluino axion model to include neutrino
masses. We discuss how the canonical seesaw model and the Higgs triplet model
may be realized in this framework. In the former case, the heavy singlet
neutrinos are contained in superfields which do not have any vacuum expectation
value, whereas the gluino axion is contained in one which does. We also
construct a specific renormalizable model which realizes the mass scale
relationship , where is the axion decay constant
and is a large effective mass parameter.Comment: 8 pages, no figur
A result on generalized derivations on right ideals of prime rings
Let R be a prime ring of characteristic other than 2 and let I be a nonzero right ideal of R. Also let U be the right Utumi quotient ring of R and let C be the center of U. If G is a generalized derivation of R such that [[G(x), x], G(x)] = 0 for all x ∈ I, then R is commutative or there exist a, b ∈ U such that G(x) = ax + xb for all x ∈ R and one of the following assertions is true:
(1) (a - λ)I = (0) = (b + λ)I for some λ ∈ C,
(2) (a - λ)I = (0) for some λ ∈ C and b ∈ C.Нехай R — просте кiльце, характеристика якого не дорiвнює 2, а I — ненульовий правий iдеал R. Нехай U — праве фактор-кiльце Утумi кiльця R, а C — центр U. Якщо G є узагальненим диференцiюванням R таким, що [[G(x),x],G(x)]=0 для всiх x∈I, то R є комутативним або iснують a,b∈U такi, що G(x)=ax+xb для всiх x∈R i виконується одне з наступних тверджень:
(1)(a−λ)I=(0)=(b+A)Iдля деякогоλ∈C,
(2)(a−λ)I=(0)для деякогоλ∈Cіb∈C
Renormalization Group Invariants in the MSSM and Its Extensions
We derive one-loop renormalization group (RG) invariant observables and
analyze their phenomenological implications in the MSSM and its \mu problem
solving extensions, U(1)' model and NMSSM. We show that there exist several RG
invariants in the gauge, Yukawa and soft-breaking sectors of each model. In
general, RG invariants are highly useful for projecting experimental data to
messenger scale, for revealing correlations among the model parameters, and for
probing the mechanism that breaks supersymmetry. The Yukawa couplings and
trilinear soft terms in U(1)' model and NMSSM do not form RG invariants though
there exist approximate invariants in low tan(beta). In the NMSSM, there are no
invariants that contain the Higgs mass-squareds. We provide a comparative
analysis of RG invariants in all three models and analyze their model-building
and phenomenological implications by a number of case studies.Comment: 32 pages, 5 tables; extended previous analysis to include U(1)'
models and NMSSM where a comparative discussion is give
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