Academic literature on the topic 'Porter´s five forces analysis'

In order to build a successful strategy for any type of business, a strategic analysis needs to be performed. A strategic analysis consists of multiple elements, but it always starts with environmental scanning. This research focuses on that very first step by conducting an environmental analysis. It is a strategic tool that identifies all the external and internal elements, which could possibly affect the organization's performance. The aim of this research was not to provide all the final and conclusive answers. It was merely to explore the research topic with varying levels of depth. Additionally, this research tended to tackle new problems on which little or no previous research has been done by combining and elaborating well-known models, such as PESTEL, Porter´s 5 forces, and SWOT. The research problem of this chapter can be described as to determine the possibilities of starting a successful commercial business within the social welfare sector of Portugal.

The study of industrial games of innovation is often associated with dominant theories representing various generic forms of organizational design and dynamics. The dominant theories in this area were traditionally Schumpeter’s destructive innovation, Porter’s five-force competitive analysis and Nalebuff’s value net. Other frameworks for analyzing industrial behavior include game theory and its derivative innovation games theory. For regulated high-technology industries, theoretical frameworks that do not account for interfirm coordination are often insufficient to understand or predict the industry behavior. Innovation in the aviation simulation and training industry will be presented in this paper as typical of the regulated high-technology industries. The aviation simulation and training industry emerged at the turn of the twentieth century and it was mostly demand-driven at its onset. The increase in the volume and importance of aviation resulted in government regulation of the industry in the late 1960’s. This has radically changed the industry’s game of innovation into a regulation-based coordination game. Literature described the regulation-centered innovation coordination as “an internally-coherent system of innovation.” The new game had the regulatory frameworks at the core of the innovation process as they defined the market’s acceptance and value capturing from innovative technologies. The evolution of these regulatory frameworks was almost entirely reactive to accidents and catastrophic failures that highlighted existing deficiencies in training methodologies or technologies. This ex-ante regulator-driven system of innovation exhibited recent evolutionary changes towards being a pedagogy-centered service-based system of innovation. The reason behind this transformation was a combination of endogenous and exogenous forces. Technological opportunities, economic pressures and strategic transformation by industry leaders were the three main categories of these forces. The resulting mode of innovation coordination in the industry was a service-oriented pedagogical platform, lead by supplier-user partnerships and monitored by regulation authorities. Compliance to equipment regulatory guidelines is not the principal means of value creation anymore. Rather, the pedagogic value of the training curriculum, encompassing the training devices, is the main source of value creation. A new stable equilibrium of innovation coordination is being reached by the industry, driven by its downstream-most service provision component.

Abstract In this paper finite element procedures are presented for analyzing the elastic-dynamic behavior of mechanical components fabricated from fiber-reinforced composite materials. An arbitrarily laminated composite plate element is created which allows the analysis of components that are moving in three dimensional space. The five D.O.F. per node static model of S. C. Panda and R. Natarajan is used as a basis for the derivation of the dynamic model. The elemental equations of motion are derived from Hamilton’s Principle. The formulation considers the total kinetic and strain energies of the moving element, together with the work due to bending, caused by the transversely acting external forces, as well as that due to the foreshortening of the element, caused by axially applied loads.

Maddalena Iovene¹, Graciela Fernandéz De Córdova2, Ombretta Romice¹, Sergio Porta¹ ¹Urban Design Studies Unit (UDSU). Department of Architecture. University of Strathclyde. 75 Montrose Street, Glasgow, G11XJ, UK. 2Centro de Investigación de la Arquitectura y la Ciudad (CIAC), Departamento de Arquitectura, PUCP. Av. Universitaria 1801, 32 San Miguel, Lima, Peru. E-mail: maddalena.iovene@strath.ac.uk, gdcfernandez@pucp.edu.pe, ombretta.r.romice@strath.ac.uk, sergioporta@strath.ac.uk Keywords (3-5): Informal Settlement, Peru, Lima, Model of Change, Urban Morphology Conference topics and scale: Reading and Regenerating the Informal City Cities are the largest complex adaptive system in human culture and have always been changing in time according to largely unplanned patterns of development. Though urban morphology has typically addressed studies of form in cities, with emphasis on historical cases, diachronic comparative studies are still relatively rare, especially those based on quantitative analysis. As a result, we are still far from laying the ground for a comprehensive understanding of the urban form’s model of change. However, developing such understanding is extremely relevant as the cross-scale interlink between the spatial and social-economic dynamics in cities are increasingly recognized to play a major role in the complex functioning of urban systems and quality of life. We study the urban form of San Pedro de Ate, an informal settlement in Lima, Peru, along its entire cycle of development over the last seventy years. Our study, conducted through a four-months on-site field research, is based on the idea that informal settlements would change according to patterns similar to those of pre-modern cities, though at a much faster pace of growth, yet giving the opportunity to observe the evolution of an urban organism in a limited time span. To do so we first digitalize aerial photographs of five different time periods (from 1944 to 2013), to then conduct a typo-morphological analysis at five scales: a) unit, b) building, c) plot, d) block, and e) settlement (comprehensive of public spaces and street network). We identify and classify patterns of change in the settlement’s urban structure using recognised literature on pre-modern cities, thus supporting our original hypothesis. We then suggest a unitary model of analysis that we name Temporal Settlement Matrix (TSM). Reference List Caniggia, G., & Maffei, G. L. (2008). Lettura dell’edilizia di base (Vol. 215). Alinea Editrice. Conzen, M. R. G. (1958). The growth and character of Whitby. A Survey of Whitby and the Surrounding Area, 49–89. Hernández, F., Kellett, P. W., & Allen, L. K. (2010). Rethinking the informal city: critical perspectives from Latin America (Vol. 11). Berghahn Books. Kropf, K. (2009). Aspects of urban form. Urban Morphology, 13(2), 105–120. Muratori, S. (1960). Studi per una operante storia urbana di Venezia. Palladio, 1959, 1–113. 22. Porta, S., Romice, O., Maxwell, J. A., Russell, P., & Baird, D. (2014). Alterations in scale: patterns of change in main street networks across time and space. Urban Studies, 51(16), 3383–3400. Watson, V. (2009). “The planned city sweeps the poor away…”: Urban planning and 21st century urbanisation. Progress in Planning, 72(3), 151–193. Whitehand, J. W. R. (2001). Changing suburban landscapes at the microscale. Tijdschrift Voor Economische En Sociale Geografie, 92(2), 164–184.

In a lead-bismuth alloy (45%Pb-55%Bi) cooled direct contact boiling water fast reactor (PBWFR), steam can be produced by direct contact of feed water with primary Pb-Bi coolant in the upper core plenum, and Pb-Bi coolant can be circulated by buoyancy forces of steam bubbles. As a basic study to investigate the two-phase flow characteristics in the chimneys of PBWFR, a two-dimensional two-phase flow was simulated by injecting argon gas into Pb-Bi pool in a rectangular vessel (400mm in length, 1500mm in height, 50mm in width), and bubble behaviors were investigated experimentally. Bubble sizes, bubble rising velocities and void fractions were measured using void probes. Argon gas was injected through five nozzles of 4mm in diameter into Pb-Bi at two locations. The experimental conditions are the pressure of atmospheric pressure, Pb-Bi temperatures of 443K, and the flow rate of injection Ar gas is 10, 20, and 30 NL/min. The measured bubble rising velocities were distributed in the range from 1 to 3 m/s. The average velocity was about 0.6 m/s. The measured bubble chord lengths were distributed from 1mm up to 30mm. The average chord length was about 7mm. An analysis was performed by two-dimensional and two-fluid model. The experimental results were compared with the analytical results to evaluate the validity of the analytical model. Although large diameter bubbles were observed in the experiment, the drag force model for spherical bubbles performed better for simulation of the experimental result because of high surface tension force of Pb-Bi.

The identification results for the linear dynamic coefficients of a K-C model for a large tilting-pad bearing in load between pad configuration are presented for specific bearing loads between 1.0 and 2.0 MPa and circumferential speeds of 39 m/s and 78 m/s. The bearing with a double tilting support is lubricated by spray-bars and can be described by the following specifications: Five pads, 0.23 nominal preload, 60% offset, 56° pad arc angle, 500 mm inner diameter, 350 mm pad length and 1.28 per mill relative bearing clearance. The test rig and the test procedure are described in detail. For the determination of the dynamic coefficients, a harmonic force is induced by two unbalance-vibration generators being attached to the frame of the rig. The relative movement between bearing and shaft is detected by proximity probes between bearing housing and shaft. The bearing forces are identified by measurements of the entire film pressure distribution in both circumferential and axial direction. In the post processing of the data, the dynamic force components are determined by a Fourier-analysis. This procedure is well-established for fixed-pad bearings. However, the uncertainties of its capabilities for tilting-pad bearings are investigated and discussed in this study. The theoretical analyses with the code COMBROS are based on a calculation of linear perturbations for the predicted static properties. The measurement and the calculation procedures show very good agreement for fixed-pad bearings. For a tilting-pad bearing the results differ with increasing frequency ratio and rotational speed. The experimental results show very poor frequency dependence in load direction and a very high one in the orthogonal direction. Theoretically, the influence of the frequency ratio is comparable in both planes and pretty low due to the pivot offset and the high effective preload. While good agreement for the measured and predicted K-C model can be observed at the lower rotational and vibrational frequency the correspondence becomes worse with the increase of both. The identification procedure uses the fluid film force to determine the dynamic coefficients and assumes that this is equal to the load on the bearing in every time step. The results indicate that the experimental identification is uncertain due to the elasticity of the double tilting bearing support and the initiated dynamic effects of it. An improvement of the measurement that also identifies the limitation of the current procedures as well as simplifications in the theoretical analyses are discussed.