A Quantum Quasi-Harmonic Nonlinear Oscillator with an Isotonic Term

The properties of a nonlinear oscillator with an additional term $k_g/x^2$, characterizing the isotonic oscillator, are studied. The nonlinearity affects to both the kinetic term and the potential and combines two nonlinearities associated to two parameters, $\kappa$ and $k_g$, in such a way that for $\kappa=0$ all the characteristics of of the standard isotonic system are recovered. The first part is devoted to the classical system and the second part to the quantum system. This is a problem of quantization of a system with position-dependent mass of the form $m(x)=1/(1 - {\kappa} x^2)$, with a $\kappa$-dependent non-polynomial rational potential and with an additional isotonic term. The Schr\"odinger equation is exactly solved and the $(\kappa,k_g)$-dependent wave functions and bound state energies are explicitly obtained for both $\kappa0$.Comment: two figure

Vector boson production in association with KK modes of the ADD model to NLO in QCD at LHC

Next-to-leading order QCD corrections to the associated production of vector boson (Z/W) with the the Kaluza-Klein modes of the graviton in large extra dimensional model at the LHC, are presented. We have obtained various kinematic distributions using a Monte Carlo code which is based on the two cut off phase space slicing method that handles soft and collinear singularities appearing at NLO level. We estimate the impact of the QCD corrections on various observables and find that they are significant. We also show the reduction in factorization scale uncertainty when QCD corrections are included.Comment: 12 pages, 5 figure

Stocking, Enhancement, and Mariculture of Penaeus orientalis and Other Species in Shanghai and Zhejiang Provinces, China

China's marine aquaculture landings provide only 18% of its combined freshwater and amrine capture and culture landings, at a per-capita consumption of only 3.2 kg/yr out of a total of 18.1 kg/yr. We described development and some of the results of long-term mariculture and stocking/enhancement projects that have been underway for up to 20 years in the Hangzhou Bay area. Penaeus orientalis (also referred to as P. chinensis) stocking provided up to 400 t/yr, at a total cost-benefit ratio of up to 8 Yuan of landed shrimp per Yuan invested in shrimp stocking. Over 40 t of Penaeus orientalis were produced commercially in 1993, with proceeds being used to fund mariculture and fisheries research. Large scale edible jellyfish restocking is also underway, while semicommercial culture of abalone, Haliotis diversicolor, has been successful. Technical problems limitig mariculture have been solved successfully for some species

Drell-Yan, ZZ, W+W- production in SM & ADD model to NLO+PS accuracy at the LHC

In this paper, we present the next-to-leading order QCD corrections for di-lepton, di-electroweak boson (ZZ, W+W-) production in both the SM and the ADD model, matched to the HERWIG parton-shower using the aMC@NLO framework. A selection of results at the 8 TeV LHC, which exhibits deviation from the SM as a result of the large extra-dimension scenario are presented.Comment: 12 pages, 10 figures, search sensitivity for the 14 TeV LHC discussed, version to appear in Eur. Phys. J.

Polar motions equivalent to high frequency nutations for a nonrigid Earth with anelastic mantle

The coefficients of polar motions of the rigid/nonrigid Earth in frequency bands other than the retrograde diurnal one are systematically computed using general expressions, derived here for the first time, for the prograde and retrograde torques exerted on the Earth by lunisolar potentials of arbitrary spherical harmonic type. Taken together with the already known coefficients of low frequency nutations and UT1 variations, they provide a complete characterization, with high precision, of the motions of the pole of the terrestrial reference frame in space; this is needed for high precision studies in astronomy and space geodesy. The inputs used for our computations are a table of tidal amplitudes, and values of the geopotential coefficients of degrees up to 4 and of other relevant basic Earth parameters. General relations which connect the coefficients of high frequency nutations to those of the equivalent polar motions are established and used for deducing the former. The Chandler resonance plays a significant role in low frequency polar motions. In this context, the role of mantle anelasticity and the nature of the Earth's deformational response to zero frequency forcing are given special consideration. The free core nutation (FCN) resonance of low frequency nutations is shown to affect the prograde semidiurnal nutations through the coupling produced between the nutations in the two frequency bands by triaxiality terms in the angular momenta of the whole Earth and of its fluid core. It is shown in a transparent fashion that the effect of the core triaxiality arises almost exclusively from the huge FCN-related resonance in the wobble of the core. The magnitude of the effect is found to be a few times smaller than reported in a recent paper; it is also found, unlike in that paper, that the changes in the eigenfrequencies due to trixiality are only of the second order in the triaxiality parameter. Numerical results for the polar motions of the nonrigid Earth in different frequency bands, as well as for the elliptical nutations of the rigid Earth, are tabulated and compared with available numbers from earlier works

PDF and scale uncertainties of various DY distributions in ADD and RS models at hadron colliders

In the extra dimension models of ADD and RS we study the dependence of the various parton distribution functions on observable of Drell-Yan process to NLO in QCD at LHC and Tevatron energies. Uncertainties at LHC due to factorisation scales in going from leading to next-to-leading order in QCD for the various distributions get reduced by about 2.75 times for a $\mu_F$ range $0.5 ~Q < \mu_F < 1.5 ~Q$. Further uncertainties arising from the error on experimental data are estimated using the MRST parton distribution functions.Comment: 27 pages, 11 figures, the version to appear in European Physical Journal

Unparticle effects in rare (t -> c g g) decay

Rare (t -> c g g) decay can only appear at loop level in the Standard Model (SM), and naturally they are strongly suppressed. These flavor changing decays induced by the mediation of spin-0 and spin-2 unparticles, can appear at tree level in unparticle physics. In this work the virtual effects of unparticle physics in the flavor-changing (t -> c g g) decay is studied. Using the SM result for the branching ratio of the (t -> c g g) decay, the parameter space of d_U and Lambda_U, where the branching ratio of this decay exceeds the one predicted by the SM, is obtained. Measurement of the branching ratio larger than 10^(-9) can give valuable information for establishing unparticle physics.Comment: 15 pages, 7 figures, LaTeX formatte

Soft-collinear effects in prompt photon production

We extend next-to-leading logarithmic threshold and joint resummation for prompt photon production to include leading collinear effects. The impact of these effects is assessed for both fixed-target and collider kinematics. We find them in general to be small, but noticeable.Comment: 14 pages, 12 figures, added comment on fragmentation contribution and one more reference. Version to appear in Phys. Rev.

Corporate social responsibility in the Russian energy industry

Purpose - The paper looks into the institutional factors that shape CSR adoption in the Russian energy industry. Underpinned by theoretical foundations, this paper helps to understand which of Scott’s (1995) three institutional pillars dominate the structuring of CSR in the Russian energy industry. CSR understanding depends heavily upon the institutional context of the countries (Kim et al. 2013). CSR is now employed internationally, facing various institutional contexts, with different cultures, regulations, norms and behaviours (Hira and Hira, 2000). Different motivational factors and value systems shape CSR internationally (Kim et al.2013). Institutions are formal or informal rules, regulations, norms and understandings that constrain and enable behavior (North, 1990). This study employs neo-institutional theory to explore the specific factors that shape CSR in the context of the Russian energy industry. A neo-institutional framework provides an approach for the understanding different attitudes and practices in a specific social context (DiMaggio and Powell, 1991; Scott, 1995). The study is a detailed qualitative analysis of CSR in Russia, a country with different value and political systems from the U.S where CSR was initially developed (Campbell, 2007). This study employs the three ‘pillars of institutions’ regulative, normative and cognitive to identify pressures on CSR actions (Scott, 1995; Kostova and Roth,2002). Design/methodology/approach - Qualitative research is appropriate for this study as it enables to develop a deep understanding of people’s hidden interpretation, motivations and understanding (Subhasis and Siva, 2014). Semi-structured interviews are conducted as it allows the employees to raise and discuss matters of importance to them (Denzin and Lincoln, 2005). Following Miles and Huberman (1994), qualitative content analysis technique is used to analyse the interviews to identify themes in the data. Preliminary Findings – The findings reveal so far that CSR practice in Russian is not related to any single institutional pressure. However, for a post-communist economy such as Russia, a regulation implementation might be weak and may not play an important role in forming CSR. In fact, the non-regulatory processes such as normative influence may have a greater impact instead. The companies have been under media pressure over the social and environmental consequences over the past several years. Companies need to meet expectations of internal stakeholders such as employees, and external such as community where the company wants to perform. Russia has a strong traditional ideology of collectivism, which places strong obligations on employers for their employees (Mamontov et al. 2014). Companies are expected to provide various social benefits to employees in terms of healthcare, education, housing. This is taken-for-granted common social belief, which is embedded in culture and specific for this particular context (Bashtovaya, 2014). This belief has been inherited from the communist era where companies were considered as ‘social caretakers’, constantly providing social benefits (Fifka and Pobizhan, 2014). This belief is culturally formed unlike the regulative and the normative pillars (Scott, 2008). Practical Implications – This paper offers an understanding on why Russian energy companies adopt CSR and what institutional factors shape their adoption. This sheds more light on institutional logics that underline CSR practices, and puts forward implications for managers and policy makers to construct more effective CSR strategies. In particular, this helps multinational companies to construct effective CSR strategies and not just adopt their CSR from home country. Value -This paper looks into institutional factors in particular, which of three institutional pillars seem more relevant in shaping CSR in the Russian energy industry. The theoretical contribution from this research is to neo-institutional theory and three pillars of institutions, and its application to understand CSR in the Russian context. Based on a wide range of literature review, I integrate literature on CSR, neo-institutional theory, and post-communist economy. Thus theoretically conceptualizing the effects of three institutional dimensions such as regulative, normative and cognitive on CSR at international level. Although prior literature suggests a connection between CSR and institutions, I attempt to extend the theoretical framework by looking at a new contextual environment. Crotty and Rodgers (2012) argue CSR research requires to be more contextualised by tacking into consideration characteristics of the country. I attempt to broaden the Western interpretation about CSR by considering the post-communist economy of the country. If contextualisation is not in place, than the type and nature of CSR undertaken in non-western contexts might be diminished and misinterpreted