Object-oriented hyperbolic solver on 2D-unstructured meshes applied to the shallow water equations

Fluid dynamics, like other physical sciences, is divided into theoretical and experimental branches. However, computational fluid dynamics (CFD) is third branch of Fluid dynamics, which has aspects of both the previous two branches. CFD is a supplement rather than a replacement to the experiment or theory. It turns a computer into a virtual laboratory, providing insight, foresight, return on investment and cost savings1. This work is a step toward an approach that realise a new and effective way of developing these CFD models.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

AdaptDB: Adaptive Partitioning for Distributed Joins

Big data analytics often involves complex join queries over two or more tables. Such join processing is expensive in a distributed setting both because large amounts of data must be read from disk, and because of data shuffling across the network. Many techniques based on data partitioning have been proposed to reduce the amount of data that must be accessed, often focusing on finding the best partitioning scheme for a particular workload, rather than adapting to changes in the workload over time. In this paper, we present AdaptDB, an adaptive storage manager for analytical database workloads in a distributed setting. It works by partitioning datasets across a cluster and incrementally refining data partitioning as queries are run. AdaptDB introduces a novel hyper-join that avoids expensive data shuffling by identifying storage blocks of the joining tables that overlap on the join attribute, and only joining those blocks. Hyper-join performs well when each block in one table overlaps with few blocks in the other table, since that will minimize the number of blocks that have to be accessed. To minimize the number of overlapping blocks for common join queries, AdaptDB users smooth repartitioning to repartition small portions of the tables on join attributes as queries run. A prototype of AdaptDB running on top of Spark improves query performance by 2-3x on TPC-H as well as real-world dataset, versus a system that employs scans and shuffle-joins

Offshore Wind Feasibility Study in India

Offshore wind provides a scalable alternative to conventional energy resources. This chapter provides an insight into various activities of Ministry of Earth Sciences for the realization of offshore wind in India. To understand the hurdles in policy frame work for offshore wind, the evolution of onshore wind policy is analyzed and suitable strategies for offshore wind are proposed. Wind resource assessment results indicated a high offshore potential at Kanyakumari, Rameshwaram, Gulf of Khambhat, and Gulf of Kutch. Commercial viability studies showed levelized cost of electricity (LCOE) of around Rs 10/kWh at identified sites for an internal rate of return (IRR) of 14%. Offshore light detection and ranging (LiDAR)-based data collection platform has been installed at Gulf of Khambhat and Kutch to obtain bankable wind data for the development of offshore wind farms. A preliminary design of substructure by exploring different concepts like monopile, jacket, and gravity-based foundations was carried out based on their suitability for site-specific environmental and soil data. The port facilities along Gujarat and Tamil Nadu coast were assessed, and installation methodology was developed considering marine spread along the Indian coast

Role of Insurance in Post Disaster Recovery Planning in Business Community

The whole world is facing a substantial of natural disasters which brings severe damages throughout the world. Attention must be given to rehabilitate the business community that is affected by these disasters. However, improper planning for recovering damages in business community becomes a major issue when it obstructs the continuation and development of the business community. Therefore, required measures should be taken to avoid collapsing of development of the business community affected by disasters. In this context, insurance plays a vital role to reinstate the business while reducing the financial consequences of the disaster. This study investigates the role of insurance as a provision to recover the disastrous destruction of the business community in Sri Lanka. To achieve this, the survey method was used as the approach and semi structured interviews carried out within five experts from insurance sector and eight experts from the business community. Content analysis was used to analyze the collected data from the empirical study. The analysis of the findings based on two areas of insurers’ and insured’ perception of insurance. One of the major finding was that the insurance is not extended to any frequent disaster prone area of the country unless accepted by the insured with either higher premium amount or higher amount of deductible. As per the insurer’s side, some issues of the current practice are identified as less awareness, dishonesty and fraudulent practice of the insured which leads to less identification of the insurance as a risk management strategy within the business community. According to the insured, main purposes of obtaining insurance are quick recovery of business and to fulfil the borrowing requirements. Recommendations were developed as increase the awareness, educating and the government participation to increase the insurance penetration to the business community

Public-private Partnerships (PPP) in Disaster Management in Developing Countries: A Conceptual Framework

With loss and damages from disasters increasing globally, reports from international agencies show that developing and the least developed countries are most affected by natural disasters. Much of the literature refers to two major problems that these countries face when managing disaster: the role of government and financial restrictions. As a result, it is difficult for these countries to develop a comprehensive disaster management framework and programs. Public-private partnerships (PPP) have become a popular way for governments to engage private actors in the delivery of government infrastructure and services with the aim of increasing quality and providing better value for money. This study will explore whether Public-Private Partnerships (PPP) can be used as a strategic approach to overcome or at least to minimise the negative impacts of disasters in developing countries. Based on a study of previous literature, this paper develops a conceptual framework that describes how the partnership between public and private actors, with certain characteristics, can establish a platform for all actors to contribute towards the objectives of disaster management in developing and least developed countries