Search results for "FSH"
showing 10 items of 147 documents
Discrete-time static output-feedback H<inf>&#x221E;</inf> controller design for vehicle suspensions
2014
This paper provides a direct and practical presentation of a novel methodology for static output-feedback controller design. The proposed design strategy has been successfully applied in the fields of control systems for seismic protection of large buildings and multi-building structures, control of offshore wind turbines, and active control of vehicle suspensions. The positive results obtained in these initial applications clearly indicate that this approach could be an effective tool in a large variety of control problems, for which an LMI formulation of the statefeedback version of the problem is available. The main objective of the paper is to facilitate a brief and friendly presentatio…
A synthesis of feasible control methods for floating offshore wind turbine system dynamics
2021
Abstract During the past decade, the development of offshore wind energy has transitioned from near shore with shallow water to offshore middle-depth water regions. Consequently, the energy conversion technology has shifted from bottom-fixed wind turbines to floating offshore wind turbines. Floating offshore wind turbines are considered more suitable, but their cost is still very high. One of the main reasons for this is that the system dynamics control method is not well-adapted, thereby affecting the performance and reliability of the wind turbine system. The additional motion of the platform tends to compromise the system’s performance in terms of power maximization, power regulation, an…
Fine slicing of the value chain and offshoring of essential activities: empirical evidence from European multinationals
2014
The offshoring of more advanced activities is increasing and a debate about the limits of offshoring has emerged. Companies are fine-slicing their value chains, and moving beyond the offshoring of peripheral and non-core activities to the offshoring of advanced and essential activities that are closer to their core (e.g. research, design and product development). The challenge is to understand the limits of offshoring and the most appropriate modes of offshoring. The purpose of this paper is to analyze what activities are offshorable and how best to govern offshored activities. We argue that companies are redefining their core activities and in this process, some essential activities previo…
Prevention of Offshore Pollution in the Mediterranean Sea Area
1998
Los Estados ribereños del Mediterráneo y la Comunidad Europea han adoptado diversos instrumentos políticos y jurídicos para la protección de la zona del Mar Mediterráneo contra la contaminación. De este modo, han creado un sistema ambiental regional que ha inspirado a otros acuerdos regionales a lo largo de todo el mundo bajo los auspicios del Programa de las Naciones Unidas para el Medio Ambiente. En este trabajo, estudio todas las medidas jurídicas y políticas adoptadas a nivel regional para prevenir, luchar, combatir y en la medida del máximo posible eliminar la contaminación de la zona del Mar Mediterráneo resultante de la explotación y explotación de la plataforma continental y del lec…
Marine Discharges of Offshore Produced Water: the North-East Atlantic Management Strategy
2002
Este capítulo contiene un estudio de Derecho internacional del medio ambiente sobre las normas y estrategias para prevenir y eliminar la contaminación resultante de hidrocarburos y otras substancias causadas por las descargas de agua de producción costa afuera en el mar. Debemos tener en cuenta que no existe ni un solo tratado internacional de ámbito mundial relativo a la contaminación por descargas de hidrocarburos contenidas en las aguas de producción generadas en las instalaciones costa afuera. De hecho, sólo hay una región marina donde existen normas jurídicas y estrategias para hacer frente a este problema de contaminación. La región marina es el Atlántico nordeste y la norma en cuesti…
A framework for data integration of offshore wind farms
2013
Abstract Operation and maintenance play an important role in maximizing the yield and minimizing the downtime of wind turbines, especially offshore wind farms where access can be difficult due to harsh weather conditions for long periods. It contributes up to 25–30% to the cost of energy generation. Improved operation and maintenance (O&M) practices are likely to reduce the cost of wind energy and increase safety. In order to optimize the O&M, the importance of data exchange and knowledge sharing within the offshore wind industry must be realized. With more data available, it is possible to make better decisions, and thereby improve the recovery rates and reduce the operational costs. This …
Proactive maintenance of offshore wind turbine blades using knowledge-based force analysis
2013
The operation and maintenance (O&M) costs of wind turbines constitute approximately 10-15% of the lifecycle cost in onshore installations and up to 30% in offshore installations. The O&M costs for offshore wind power plants are higher than the onshore ones due to greater logistical challenges of maintaining and servicing, and the less mature state of offshore wind energy technology. Wind turbine blades suffer from various faults, for example, blade angle asymmetry, icing, and bends. These faults may cause wind turbines to a standstill. Replacement of rotor blades will normally result in a long downtime since the replacement process involves heavy transportation (vessel, crane) and dependenc…
The curvilinear effect of manufacturing outsourcing and captive-offshoring on firms' innovation: The role of temporal endurance
2019
Abstract This paper aims to contribute to the open debate in the literature on the effect of global sourcing strategies on firm performance by studying the consequences of manufacturing outsourcing and captive-offshoring for the innovation capability of the firm. We grounded our hypotheses based on the outsourcing and offshoring literature and by narrowing our focus to the effects of persisting in their adoption over time. We tested our hypotheses using data from a sample of 368 manufacturing companies listed on NASDAQ stock market. The paper provides theoretical explanations and empirical findings for the inverted U-shaped influence of keeping doing captive-offshoring on new product develo…
Offshoring and Sequential Production Chains: A General-Equilibrium Analysis
2021
The Canadian journal of economics = Revue canadienne d'économique (2021). doi:10.1111/caje.12506
Lo sviluppo sostenibile della pesca nella marineria di Mazara del Vallo
2011
In a place like Sicily, where sea fishing and port activities are part of the territory, history and culture, fishery has always been vital to man and, for this reason, today it must be studied, protected and helped in the difficult transition towards long-term sustainability. Fishing is a driving sector for Mazara economy both for number of working days during the fishing season, and for industrial activities operating around this field (transformation, packaging, and distribution). A micro-economic analysis was carried on a sample of fishing enterprises in order to analyze the problems of the here studied seamanship. The analysis is based on the employers’ interviews. The collected data h…