The smooth ponomarenko dynamo

In this work, we study a class of continuous generalisations of the kinematic Ponomarenko Dynamo, in an annulus with perfectly conducting boundary conditions.\par We first consider the fundamentals of dynamo theory, deriving the governing equations and a general numerical code to find the growth rates for all modes and magnetic Reynolds numbers $R$. We concentrate on three types of flow fields: (a) flows which approximate the discontinuous Ponomarenko dynamo, (b) full solutions of the Navier Stokes driven by an axial pressure gradient and moving boundaries, and (c) flows where both the axial and azimuthal velocity components are powers of the cylindrical radius. Good agreement is found between the numerical results and the known asymptotic theory for large $R$. The smallest $R$-values permitting dynamo action are found, along with the values which gives rise to the fastest growing mode.Open Acces

The earlier gardar igneous rocks of the Ilimaussaq area of South Greenland

During the earlier part of the Gardar Period, contental sandstones and volcanics (principally flows of olivine basalt) were laid down in the Ilimaussaq region; strata with a maximum thicjness of over 3km. are preserved. The region was characterised by block faulting with sizeable dislocations and the stratigraphic succession on each fault block is different. The geology of each of the blocks is discussed in turn and, in a final synthesis, the successions of the blocks are correlated and a preliminary analysis made of the fault system. In addition to the basalt magma, which was erupted quietly in great quantities, a quite separate volatile-fich ultramafic magma was available in the region at intervals during the early Gardar. It was responsible for the drilling of numerous diatremes and for a phase of intense, explosive volcanic activity. There is clear evidence of the presence of a related, concealed carbonatite body, located near Qagssiarssuk, in the north of the area. The associated lampropbyric rocks in this vicinity have been subjected to calcitic carbonatisation, followed by ankeritic carbonatisation, while the country rocks have been subjected to potash feldspathisation. Necks, sills and flows of carbonatissd uncompahgrite occur. The petrography of the volcanic rocks is discussed in some detail and chemical analyses are provided. Separate studies, in which X-ray techniques were used extensively, have been made of the carbonates, the alkali feldspars and the trace elements, in rocks associated with the carbonatite. The lamprophyre-carbonatite vulcanism has many parallels in the volcanic fields of East Africa, but the presence of olivine basalt magnia in the area at the same time is an unusual feature. On occasions, the two magmas were erupted almost simultaneously, yet there is no indication of intermingling or mutual contamination

The Testing of an Experiential Framework for Teaching System Development Projects Using a Collaborative Project Management Approach

Experiential learning approaches have been especially effective in information systems courses where ‘real-world’ scenarios are used to provide a degree of complexity that reflects actual system development projects. Students are shown how the principles of project management can provide a framework for reducing the difficulty and complexity of the development process to a more manageable procedure as they put into practice their knowledge and skills from previous courework in creating working application systems. This paper outlines an experiential approach for teaching the value of information systems project management in the systems development process through the collaborative efforts of the graduate class in Information Technology Project Management, and the undergraduate senior capstone projects course

A Survey of Team Teaching Effectiveness in Executive Graduate Business Programs

This paper contributes to the academic literature by using a survey instrument of executive students to assess the effectiveness of team teaching in a multidisciplinary Executive MBA management program and an Executive Master’s program in Finance. The cohort structure of the program and the virtual similarities between the two programs allows for a unique way of addressing this issue. The results of the survey show that the multidisciplinary EMBA program was more effective in fostering an integrated team teaching approach. The results also suggest that there is a transition process in incorporating the team teaching approach in new programs as evidenced by the results in the Executive Master’s Program in Finance

Assessing an Information Systems Master\u27s Curriculum Program: Revisiting the ACM\u27s MSIS 2006 Model Curriculum

The field of Information systems continues to change dynamically with the painful impact for reacting to those changes felt by both undergraduate and masters’ level programs. The purpose of this paper is to report the results of a comparative selfstudy of one MSIS program as a measure to assess its competitiveness among a set of other comparable, competitive and aspirant masters’ programs. The focus of the study is determine the viability of one specific master’s curriculum used currently to prepare students for professional careers in information systems in order to meet the marketplace challenges created by the ever-evolving information systems business needs. The fundamental methodology used in this study is based on that which was employed in a previous study conducted to assess the ‘fit’ of 86 MSIS programs with the MSIS 2000 Model Curriculum (Vijayaraman, et.al.) Findings will be presented that reflect shared learning objectives, curriculum content, currency, and relevancy necessary to assess whether changes to the current curriculum are necessary to establish a more competitive position among the three categories of comparable, competitive and aspirant university MSIS programs. One benefit that resulted from this initiative is the recognition that there has been relatively little research directed at assessing the overall direction of current MSIS programs and the need to revisit the need for a new MSIS model curriculum. The last endorsed MSIS model curriculum was published in 2006 (Gorgone, et.al. 2006), almost 10 years ago. It is the hope of presenting the results of this study that a discussion can begin to address the challenge of maintaining a viable MSIS curriculum that meets the current and future demands of the business communit

A conceptual model : impact of usage of social media tools to enhance project management success

Research on the impact of social media in the workplace has focused on identifying ways in which the latest modes of shared communications has influenced productivity in project development, testing, and implementation. Traditionally, a written formal project management communication plan has been key in supporting the integration management that coordinates the project from beginning-to-end, to ensure a greater level of collaboration when managing project scope, schedule, budget and quality, and also to provide a greater sense of confidence in completing the project successfully. However, how beneficial are social media networks in improving the project team’s dynamics, which are important for successfully managing scope verification, budget adherence, and schedule compliance? How will these tools play a role in ensuring greater user involvement, senior management commitment, and user/system requirements? The purpose of this research is firstly to recognize what types of social media networks have been used and accepted as potential models for improving project management, and secondly; to promote a discussion to advance research paradigms for investigating the impact of implementing social media networks in project management.info:eu-repo/semantics/publishedVersio

Adopting the IS 2009 Model Curriculum: Apanel Session to Address the Challenges for Program Implementation

This panel session is designed to initiate an open forum and frank discussion of the IS 2009 Model Curriculum proposed by the Joint IS 2009 Curriculum Task Force and developed as a cooperative effort by the Association for Computing Machinery (ACM) and the Association for Information Systems (AIS). Following an introduction to the new model curriculum, a summary and overview of the changes from IS 97/2002 to the IS 2009 recommended core and elective courses will be presented and a panel representing academia and business will address possible issues, challenges, and implications of implementing the suggested curriculum changes on the major stakeholders that include students, faculty, administration, infrastructure resources, and the business community. Concluding the session will be an open forum to allow audience participation in the discussion for the purpose of exchanging ideas on the implementation of the new model curriculum

The Use of a Dynamic Elastomeric Fabric Orthotic Intervention in Adolescents and Adults with Scoliosis

The use of dynamic elastomeric fabric orthoses in the non-surgical management of scoliosis has been growing over the last 20 years in the paediatric populations and has now started to be used in adolescent and adult patients as well. The concepts of treatment concentrate on the use of movement and changes in the neurological pattern generation, to reduce scoliosis curve Cobb angles and pain that is sometimes experienced due to an altered positional sense. This chapter introduces research, including recent computer modeling, to demonstrate the effects of the combination of two different layered textiles which enable improved comfort, aesthetics as well as scoliosis clinical management. The textile combination enables a total body suit to use 3D scoliosis brace knowledge to assist in developing new orthotic interventions for adolescents and adults with both neurological and idiopathic onset scoliosis, for several different presentations

Preparation of Novel Hydrolyzing Urethane Modified Thiol-ene Networks

Novel tetra-functional hydrolyzing monomers were prepared from the reaction of TEOS and select alkene-containing alcohols, ethylene glycol vinyl ether or 2-allyloxy ethanol, and combined with trimethylolpropane tris(3-mercaptopropionate) (tri-thiol) in a thiol-ene “click” polymerization reaction to produce clear, colorless thiol-ene networks using both radiation and thermal-cure techniques. These networks were characterized for various mechanical characteristics, and found to posses Tg’s (DSC), hardness, tack, and thermal stability (TGA) consistent with their molecular structures. A new ene-modified urethane oligomer was prepared based on the aliphatic polyisocyanate Desmodur® N 3600 and added to the thiol-ene hydrolyzable network series in increasing amounts, creating a phase-segregated material having two Tg’s. An increase in water absorption in the ene-modified urethane formulations leading to a simultaneous increase in the rate of hydrolysis was supported by TGA data, film hardness measurements, and an NMR study of closely related networks. This phenomenon was attributed to the additional hydrogen bonding elements and polar functionality brought to the film with the addition of the urethane segment. SEM was utilized for visual analysis of topographical changes in the film’s surface upon hydrolysis and provides support for surface-driven erosion. Coatings prepared in this study are intended for use as hydrolyzing networks for marine coatings to protect against ship foulin