Identifying drivers of sustainability initiatives in manufacturing organizations—an exploratory study from the Indian cement industry

In the current business scenario, firms need to increasingly focus on environmental sustainability issues, as a result of stricter regulatory enforcements that lay emphasis on cleaner production, and also due to growing pressures from the stakeholders. This paper aims at understanding the organizational factors that contribute towards the successful implementation of sustainability initiatives in a process industry setup. A qualitative case study from a major cement manufacturing firm located in India helps us to identify the key drivers in the context of sustainability. The case findings reveal that organizational culture and practices followed lead to the emergence of innovative and economically viable solutions, which help in achieving the sustainability targets. These exploratory results obtained can be further analysed in the backdrop of other industries

Low Power FinFET based SRAM Cell Design

With the incessant developments occurring in VLSI circuits and systems arena and power dissipation becoming a major design constraint, the power component can be considerably reduced through efficient designing of the SRAM memory elements. Nowadays, multi-gate devices such as the FinFETs play a prominent role in reducing the power dissipation that what was found realizable by the conventional CMOS devices. Additionally, the FinFETs are found to be capable of overcoming some of the major drawbacks of the conventional CMOS devices, namely, the leakage current, the sub-threshold leakage, parasitic capacitance etc. This paper uses 32nm FinFET devices for the implementation of the 6T, 7T SRAM cell architectures and the resultant power is calculated for the read and write operations, to study the comparative benefits of the use of FinFETs in the memory cells than that of the CMOS counterpart circuits. Industry standard Cadence EDA tools have been employed for the simulations. The layout designs of 6T and 7T SRAM cells have been carried out using 180nm CMOS technology library for post layout simulations

Tricritical gravity waves in the four-dimensional generalized massive gravity

We construct a generalized massive gravity by combining quadratic curvature gravity with the Chern-Simons term in four dimensions. This may be a candidate for the parity-odd tricritical gravity theory. Considering the AdS$_4$ vacuum solution, we derive the linearized Einstein equation, which is not similar to that of the three dimensional (3D) generalized massive gravity. When a perturbed metric tensor is chosen to be the Kerr-Schild form, the linearized equation reduces to a single massive scalar equation. At the tricritical points where two masses are equal to -1 and 2, we obtain a log-square wave solution to the massive scalar equation. This is compared to the 3D tricritical generalized massive gravity whose dual is a rank-3 logarithmic conformal field theory.Comment: 17 pages, 1 figure, version to appear in EPJ

No chiral truncation of quantum log gravity?

At the classical level, chiral gravity may be constructed as a consistent truncation of a larger theory called log gravity by requiring that left-moving charges vanish. In turn, log gravity is the limit of topologically massive gravity (TMG) at a special value of the coupling (the chiral point). We study the situation at the level of linearized quantum fields, focussing on a unitary quantization. While the TMG Hilbert space is continuous at the chiral point, the left-moving Virasoro generators become ill-defined and cannot be used to define a chiral truncation. In a sense, the left-moving asymptotic symmetries are spontaneously broken at the chiral point. In contrast, in a non-unitary quantization of TMG, both the Hilbert space and charges are continuous at the chiral point and define a unitary theory of chiral gravity at the linearized level.Comment: 20 pages, no figures, references adde

Non-Singular Charged Black Hole Solution for Non-Linear Source

A non-singular exact black hole solution in General Relativity is presented. The source is a non-linear electromagnetic field, which reduces to the Maxwell theory for weak field. The solution corresponds to a charged black hole with |q| \leq 2s_c m \approx 0.6 m, having metric, curvature invariants, and electric field bounded everywhere.Comment: 3 pages, RevTe

Universal thermal and electrical conductivity from holography

It is known from earlier work of Iqbal, Liu (arXiv:0809.3808) that the boundary transport coefficients such as electrical conductivity (at vanishing chemical potential), shear viscosity etc. at low frequency and finite temperature can be expressed in terms of geometrical quantities evaluated at the horizon. In the case of electrical conductivity, at zero chemical potential gauge field fluctuation and metric fluctuation decouples, resulting in a trivial flow from horizon to boundary. In the presence of chemical potential, the story becomes complicated due to the fact that gauge field and metric fluctuation can no longer be decoupled. This results in a nontrivial flow from horizon to boundary. Though horizon conductivity can be expressed in terms of geometrical quantities evaluated at the horizon, there exist no such neat result for electrical conductivity at the boundary. In this paper we propose an expression for boundary conductivity expressed in terms of geometrical quantities evaluated at the horizon and thermodynamical quantities. We also consider the theory at finite cutoff outside the horizon (arXiv:1006.1902) and give an expression for cutoff dependent electrical conductivity, which interpolates smoothly between horizon conductivity and boundary conductivity . Using the results about the electrical conductivity we gain much insight into the universality of thermal conductivity to viscosity ratio proposed in arXiv:0912.2719.Comment: An appendix added discussing relation between boundary conductivity and universal conductivity of stretched horizon, version to be published in JHE

Renormalizability of Massive Gravity in Three Dimensions

We discuss renormalizability of a recently established, massive gravity theory with particular higher derivative terms in three space-time dimensions. It is shown that this massive gravity is certainly renormalizable as well as unitary, so it gives us a physically interesting toy model of perturbative quantum gravity in three dimensions.Comment: 13 pages, no figure