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(R1508) Stability and Zero Velocity Curves in the Perturbed Restricted Problem of 2 + 2 Bodies
Get PDFThe present study investigates the existence and linear stability of the equilibrium points in the restricted problem of 2+2 bodies including the effect of small perturbations epsilon-1 and espilon-2 in the Coriolis and centrifugal forces respectively. The less massive primary is considered as a straight segment and the more massive primary a point mass. The equations of motion of the infinitesimal bodies are derived.We obtain fourteen equilibrium points of the model, out of which six are collinear and rest non-collinear with the centers of the primaries. The position of the equilibrium points are affected by the small perturbation in centrifugal force, length and mass parameters, but there is no impact of small perturbation in Coriolis force on them. In addition, the obtained results are applied to Earth-22 Kalliope-dual satellite system. For this system, we calculate collinear and non-collinear equilibrium points and observed that the number of non-collinear equilibrium points depends on epsilon-2. Furthermore, for a set of values of the parameters epsilon-1 and epsilon-2, we have checked the stability of all the equilibrium points and concluded that all the equilibrium points are found to be unstable. The permissible regions of motion for the Earth-22 Kalliope-dual satellite system are also studied
(R1056) Effect of Rotation on Plane Waves of Generalized Magneto-thermoelastic Medium with Voids under Thermal Loading due to Laser Pulse
Get PDFThe investigation in this paper deals with the rotation of the magneto-thermoelastic solid and with voids subjected to thermal loading due to laser pulse. The problem is studied in the context of three theories of generalized magneto thermoelasticity: Lord-Schulman (L-S), Green-Lindsay (G-L) and the coupled theory (CD) with the effect of rotation, magnetic field, thermal loading and voids. The methodology applied here is using the normal mode analysis to solve the physical problem to obtain the exact expressions for the displacement components, the stresses, the temperature, and the change in the volume fraction field have been shown graphically by comparison between three theories, in the presence and the absence of rotation, magnetic field and for two different values of time on thermoelastic material in the presence of voids
The need for compelling problematisation in research: The prevalence of the gap-spotting approach and its limitations
No full textThe nonlinear influence of harmonious information technology affordance on organisational innovation
No full textIn this study, we investigate the nature of the influence of organisational information technology (IT) on innovation. To examine this relationship, we leverage a fundamental construct: harmonious IT affordance (HITA). HITA is defined as the degree of coalignment between three salient organisational IT affordances, each of which allows an organisation to carry out its most fundamental functions using IT—collaboration, maintenance of organisational memory, and management of organisational processes. We theorize that HITA has a quadratic (U-shaped) effect on innovation. Our theory proposes that when IT affordances increasingly co-align (reflected by increasing HITA), the organisation enters a synergistic, virtuous phase that encourages innovation. Counterintuitively, the increasing misalignment of IT affordances can also result in organisational innovation via creative dissonance, which enables organisations to look for opportunities in the presence of misalignment and leverage it to create a synergistic virtuous cycle. We conducted two empirical studies—one with high-level IT executives knowledgeable about innovation and one with sales and business development executives (who market innovations) knowledgeable about IT—that corroborate our theory. Crucially, if the IT affordances are unrelated (low coalignment, where HITA is close to zero), then innovation does not take place. We thus surmise that the relation between HITA and innovation is quadratic
Land cover changes in ghana over the past 24 years
No full textChanges in land cover (LC) can lead to environmental challenges, but few studies have investigated LC changes at a country wide scale in Ghana. Tracking LC changes at such a scale overtime is relevant for devising solutions to emerging issues. This study examined LC changes in Ghana for the past almost two and half decades covering 1995–2019 to highlight significant changes and opportunities for sustainable development. The study used land cover data for six selected years (1995, 2000, 2005, 2010, 2015, and 2019) obtained from the European Space Agency. The data was analyzed using R, ArcGIS Pro and Microsoft Excel 365 ProPlus. The original data was reclassified into eight LC categories, namely: agriculture, bare area, built-up, forest, grassland, other vegetation, waterbody, and wetland. On average, the results revealed 0.7%, 131.7%, 23.3%, 46.9%, and 11.2% increases for agriculture, built-up, forest, waterbody, and wetland, respectively, across the nation. However, losses were observed for bare area (92.8%), grassland (51.1%), and other vegetation (41%) LCs overall. Notably, agricultural land use increased up to 2015 and decreased subsequently but this did not affect production of the major staple foods. These findings reveal the importance of LC monitoring and the need for strategic efforts to address the causes of undesirable change
Generation and Statistical Properties for Lindley-Polynomial Distribution
Get PDFFor the modeling of the wind speed, we propose a family of distributions in polynomial form generating the Lindley distribution. We call this distribution Lindley-Polynomial distribution. The estimation of parameters using the maximum product spacing estimation method. A real data set has been considered to illustrate the practical utility of the paper
ENGL 1301 - English Composition I - Language and Communication
Get PDFThis OER packet contains the course materials for ENGL 1301 - English Composition I . In academic settings, the reasons for writing fulfill four main purposes: to summarize, to analyze, to synthesize, and to evaluate. You will encounter these four purposes not only as you read for your classes but also as you read for work or pleasure. Because reading and writing work together, your writing skills will improve as you read. Eventually, your instructors will ask you to complete assignments specifically designed to meet one of the four purposes. As you will see, the purpose for writing will guide you through each part of the paper, helping you make decisions about content and style. For now, identifying these purposes by reading paragraphs will prepare you to write individual paragraphs and to build longer assignments.https://digitalcommons.pvamu.edu/pv-open-education-resources/1004/thumbnail.jp
ENGL 1302 Composition II Research and Analysis - Language and Communication
Get PDFThis OER packet contains the course materials for ENGL 1302 Composition II Research and Analysis that introduce you to the ways in which the act of writing has the power to help you make connections between yourself and the world. Writing can help you establish your own experiences or ideas in relation to the experiences or ideas of others. In short, it can help you figure out what you think about things and help you to situate those thoughts in relation to the world and among the multitude of opinions and ideas that exist within it. That’s a powerful tool.https://digitalcommons.pvamu.edu/pv-open-education-resources/1003/thumbnail.jp
Project management in oil and gas
No full textThis chapter starts with an overview of portfolio and program management in the oil and gas industry. To completely cover the project management in the oil and gas industry, Project Management Body of Knowledge from Project Management Institute has been adopted. This project management standard covers the entire project management in 10 main knowledge areas: integration, scope, schedule, cost, quality, resource, communication, risk, procurement, and stakeholder management. Following the portfolio and program management overview section of this chapter, oil and gas project practices in all the knowledge mentioned above areas are investigated, and best practices are mentioned