Risks and Uncertainty in the Formal Solutions to the Informal Settlements in India

This paper discusses various formal solutions adopted by the Indian official bodies to deal with the Indian informal settlements “the slums”. It focuses on Pradhan Mantri Awas Yojana (PMAY) or the “Housing for All by 2022” as an essential housing act toward improv-ing the living conditions of the informal settlements, and to achieve cities and housing for all. According to the Indian 2011 censes, 66% of formal towns and cities in India have informal areas. Nearly one in every six urban Indian res-idents lives in a slum. Poor and rural immigrants find in the slums a physical shelter, but they lack quality of living and basic social-economic infrastructure. Bringing formal solution to the informal set-tlements is a challenge that requires deep understanding of the Indian heterogeneous population. This paper starts with the main housing policies that were launched in India during the 2000s, and extend to cover several case studies in In-dian cities based on a field visit conducted in India. It discusses sever-al concepts applied such as in-situ and relocation alternatives; possible improvements for the local communities by promoting livelihood re-sources; the concepts of using land as a resource, land pooling and public private partnership in developing the slums. This paper aims to understand the notion of risks and uncertainty in these solutions as constraints in improving the informal settlements in India for a better urbanism future

Periodic orbits of the planar anisotropic Kepler problem

Agraïments: The second author of this work was partially supported by Fundación Séneca de la Región de Murcia grant number 19219/PI/14.In this paper we prove that at every energy level the anisotropic problem with small anisotropy has two periodic orbits which bifurcate from elliptic orbits of the Kepler problem with high eccentricity. Moreover we provide approximate analytic expressions for these periodic orbits. The tool for proving this result is the averaging theory

The dynamics of the relativistic Kepler problem

Altres ajuts: Fundación Séneca (Spain), grant 20783/PI/18We deal with the Hamiltonian system (HS) provided by the correction given by the special relativity to the motion of the two-body problem, or by the first order correction to this problem coming from the general relativity. This Hamiltonian system is completely integrable with the angular momentum C and the Hamiltonian H. We have two objectives. First, we describe the global dynamics of the Hamiltonian system (HS) in the following sense. Let Ih and Ic are the subset of the phase space where H = h and C = c. Since C and H are first integrals, the sets Ic, Ih and Ihc = Ih∩Ic are invariant by the action of the flow of the Hamiltonian system (HS). We determine the global dynamics on those sets when h and c vary. Second, recently Tudoran in [21] provided a criterion which detects when a non-degenerate equilibrium point of a completely integrable system is Lyapunov stable. Every equilibrium point q of the completely integrable Hamiltonian system (HS) is degenerate and has zero angular momentum, so the mentioned criterion cannot be applied to it. But we will show that this criterion is also satisfied when it is applied to the Hamiltonian system (HS) restricted to zero angular momentum

Periodic Orbits of Quantised Restricted Three-Body Problem

In this paper, perturbed third-body motion is considered under quantum corrections to analyse the existence of periodic orbits. These orbits are studied through two approaches to identify the first (second) periodic-orbit types. The essential conditions are given in order to prove that the circular (elliptical) periodic orbits of the rotating Kepler problem (RKP) can continue to the perturbed motion of the third body under quantum corrections where a massive primary body has excessive gravitational force over the smaller primary body. The primaries moved around each other in circular (elliptical) orbits, and the mass ratio was assumed to be sufficiently small. We prove the existence of the two types of orbits by using the terminologies of Poincaré for quantised perturbed motion

On the Periodic Orbits of the Perturbed Two- and Three-Body Problems

In this work, a perturbed system of the restricted three-body problem is derived when the perturbation forces are conservative alongside the corresponding mean motion of two primaries bodies. Thus, we have proved that the first and second types of periodic orbits of the rotating Kepler problem can persist for all perturbed two-body and circular restricted three-body problems when the perturbation forces are conservative or the perturbed motion has its own extended Jacobian integral

Emergent situations for smart cities: A survey

A smart city is a community that uses communication and information technology to improve sustainability, livability, and feasibility. As any community, there are always unexpected emergencies, which must be treated to preserve the regular order. However, a smart system is needed to be able to respond effectively to these emergent situations. The contribution made in this survey is twofold. Firstly, it provides a comprehensive exhaustive and categorized overview of the existing surveys for smart cities.  The categorization is based on several criteria such as structures, benefits, advantages, applications, challenges, issues, and future directions. Secondly, it aims to analyze several studies with respect to emergent situations and management to smart cities. The analysis is based on several factors such as the challenges and issues discussed, the solutions proposed, and opportunities for future research. The challenges include security, privacy, reliability, performance, scalability, heterogeneity, scheduling, resource management, and latency. Few studies have investigated the emergent situations of smart cities and despite the importance of latency factor for smart city applications, it is rarely discussed