Flavor changing Z' couplings at the LHC

Models with a non-universal Z' exhibit in general flavor changing neutral currents (FCNC) at tree-level. When the Z' couplings favor the third generation, flavor changing transitions of the form Z'tc and Z'tu could be large enough to be observable at the LHC. In this paper we explore this possibility using the associated production of a single top-quark with the Z' and find that integrated luminosities of a few hundred fb$^{-1}$ are necessary to probe the interesting region of parameter space.Comment: 12 LaTeX Pages, 10 EPS Figure

Critical behavior in ultra-strong-coupled oscillators

We investigate the strong coupling regime of a linear $x$-$x$ coupled harmonic oscillator system, by performing a direct diagonalization of the hamiltonian. It is shown that the $x$-$x$ coupled hamiltonian can be equivalently described by a Mach-Zehnder-type interferometer with a quadratic unitary operation in each of its arms. We show a sharp transition of the unitary operation from an elliptical phase rotator to an elliptical squeezer as the coupling gets stronger, which leads to the continuous generation of entanglement, even for a significantly thermal state, in the ultra-strong coupled regime. It is also shown that this critical regime cannot be achieved by a classical Hookian coupling. Finally, the effect of a finite-temperature environment is analyzed, showing that entanglement can still be generated from a thermal state in the ultra-strong coupled regime, but is destroyed rapidly

CP violating anomalous top-quark couplings at the LHC

We study the T odd correlations induced by CP violating anomalous top-quark couplings at both production and decay level in the process gg --> t t_bar --> (b mu+ nu_mu) (b_bar mu- nu_mu_bar). We consider several counting asymmetries at the parton level and find the ones with the most sensitivity to each of these anomalous couplings at the LHC.Comment: 14 LaTeX Pages, 1 EPS Figure, minor typos correcte

Spiders (Araneae) from Agricultural fields near foothill of Satpura Mountain ranges of Amravati District, Maharashtra, India.

This paper deals with the study of spider distribution in agricultural fields adjoining the Satpura Mountain Ranges of the Amravati district. The total collection of spiders comprises 12 families, 37 genera and 76 species. The Araneidae and Thomisidae families were dominant, followed by Saltisidae from the selected agricultural area. Lycosidae and Tetragnathidae were also found in a decreasing number of species due to their specific habitation. The analysis of guild structure revealed six feeding guilds. Orb web weavers and Ambushers constituted the dominant feeding guild representing 33% and 22% of the total collection respectively. Stalkers and ground runners represent 20% and 17% and foliage hunters and sheet web weavers represent 5% and 3% respectively. A new species of genus Sassacus (Beetle like spider), family Saltisidae was found for the first time in the Vidarbha region. The richness of spider diversity is a sign of the overall biodiversity which is a useful indicator of the species richness of the agro-ecosystem.
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Networking of Tracking Radars of Two Different SAM Weapons to Protect the Missile in Intensive Jamming Environment

Many countries including India use the Russian made SAM-3 (Pechora) surface-to-air missile (SAM) weapon systems to protect their strategic and tactical infrastructure. The mathematical computations done in this paper, conclusively proves that SA-125 low-blow tracking radar of Pechora is vulnerable to jamming. A project was undertaken to overcome the jamming vulnerability of Pechora aiming to design and develop an electronic counter counter measure system. This system networked the Pechora tracking radar with a western tracking radar, Flycatcher, developed by HSA Holland. The latter radar works in a MMW band. When jamming (x band) is employed by enemy aircraft the Low blow radar failed to provide target coordinates. But the flycatcher tracking radar which is tracking in Ka band provided the tracking coordinates (after parallax correction) to the command guidance computer. This way the missile guidance is protected until missile warhead in missile blasts near the target. Extensive trials carried out with a number of aircraft sorties proved the success of this developed system against jamming

Relaxin Activates Peroxisome Proliferator-activated Receptor ƴ (PPAR\u3csub\u3eƴ\u3c/sub\u3e) through a Pathway Involving PPAR \u3csub\u3eƴ\u3c/sub\u3e Coactivator 1α (PGC1α)

Background: Relaxin activates peroxisome proliferator-activated receptorƴ (PPARƴ) by an unknown PPARƴ ligandindependent mechanism. Results: Expression of PPARƴ coactivator 1α (PGC1α) was increased by relaxin through distinct signaling pathways. Conclusion: The mechanism for relaxin regulation of PPARƴ is through increased PGC1α levels. Significance: Discovery of new targets of relaxin signaling may provide further understanding of its pleiotropic effects

A study of intra-operative maternal morbidity after repeating caesarean section

Background: Caesarean section (CS) is one of the most common obstetric procedures worldwide and an increased rate of caesarean section has been observed in recent studies. Maternal morbidities and mortality associated with repeat caesarean section is an important health problem. The present study aims at knowing the various intraoperative complications encountered during repeat caesarean sections. Objective was to study the incidence and type of surgical difficulties encountered in repeat cesarean sectionsMethods: It was a prospective observational study of 118 cases of repeat cesarean sections. Intra-operative findings of all cases were analyzed to know the difficulties encountered because of previous cesarean section.Results: In present study, out of total 118 cases of previous cesarean sections, 71 (60.17%) cases were of previous one caesarean section and 47(39.83%) were of previous two cesarean sections. Following intraoperative morbidities were encountered – adhesions (1 caesarean section vs 2 caesarean section – 40.85 vs 65.96% respectively) , thin lower uterine segment (1 caesarean section vs 2 caesarean section – 21.13 vs 36.17% respectively), advanced bladder(1 caesarean section vs 2 caesarean section – 15.49 vs 36.17 % respectively) , extension of uterine incision(1 caesarean section vs 2 caesarean section – 9.86 vs 19.15% respectively) , scar dehiscence(1 caesarean section vs 2 caesarean section –7.04 vs 31.91% respectively), excess blood loss (1 caesarean section vs 2 caesarean section –7.04 vs 19.15% respectively), 1 case of placenta accrete was found in previous 2 caesarean section 2.13%) which needed caesarean hysterectomy. uterine rupture and bladder injury seen in one patients of previous 2caesarean section. Time taken for surgery was more in repeat CS group Delivery.Conclusions: An increasing number of CS is accompanied by increased maternal morbidity. Intraoperative complication which increase the risk of morbidity are adhesion, placenta accreta. It is prudent to involve a senior experienced obstetrician in repeat cesarean section. The best way to reduce this is by reducing primary caesarean section rates. Patients with previous caesarean section should be considered as high risk and should be counseled for regular antenatal check-up and they should be given option of vaginal birth after CS whenever possible