Specific "scientific" data structures, and their processing

Programming physicists use, as all programmers, arrays, lists, tuples, records, etc., and this requires some change in their thought patterns while converting their formulae into some code, since the "data structures" operated upon, while elaborating some theory and its consequences, are rather: power series and Pad\'e approximants, differential forms and other instances of differential algebras, functionals (for the variational calculus), trajectories (solutions of differential equations), Young diagrams and Feynman graphs, etc. Such data is often used in a [semi-]numerical setting, not necessarily "symbolic", appropriate for the computer algebra packages. Modules adapted to such data may be "just libraries", but often they become specific, embedded sub-languages, typically mapped into object-oriented frameworks, with overloaded mathematical operations. Here we present a functional approach to this philosophy. We show how the usage of Haskell datatypes and - fundamental for our tutorial - the application of lazy evaluation makes it possible to operate upon such data (in particular: the "infinite" sequences) in a natural and comfortable manner.Comment: In Proceedings DSL 2011, arXiv:1109.032

Secure Virtualization and Multicore Platforms State-of-the-Art report

SVaM

Hospitality Management Instructor Attitudes towards COVID-Driven Compulsory Course-Virtualization: A Qualitative Descriptive Study

The purpose of this qualitative descriptive study was to explore how hospitality management instructors at a college of management in the Northeastern United States describe their attitudes towards the effects on instruction of the COVID-driven compulsory virtualization of their courses that occurred in Spring 2020. The Theory of Technology Acceptance, the Extended Theory of Technology Acceptance, and the Unified Theory of the Use and Acceptance of Technology jointly constituted this study’s theoretical foundations. Data collection was guided by three research questions, namely: (i) How do hospitality management instructors describe their attitudes towards the effects on teaching of the COVID-driven virtualization of instruction that occurred in Spring 2020? (ii) How do such instructors describe the setbacks created by said virtualization? (iii) How do such instructors describe the benefits of said virtualization? Data was acquired through 14 semistructured interviews and two semi-structured focus groups. Thematic analysis of the data yielded eight themes: (i) Virtual instruction was relatively convenient in some respects; (ii) Student-on-student interaction was limited; (iii) Instructor-student interaction was limited; (iv) Complex material was hard to teach; (v) Students disengaged; (vi) Virtual courses came to resemble correspondence courses; (vii) Courses involving labs and lab-like components could not be taught properly: (viii) Virtual instruction had more downsides than upsides. Conclusion: In order for the virtualization of hospitality management courses to succeed, the technology being used must allow the emotional dynamics that govern inperson instruction to govern virtual instruction

Exploring Views on Data Centre Power Consumption and Server Virtualization

The primary purpose of this Thesis is to explore views on Green IT/Computing and how it relates to Server Virtualization, in particular for Data Centre IT environments. Our secondary purpose is to explore other important aspects of Server Virtualization, in the same context. The primary research question was to determine if Data Centre (DC) power consumption reduction is related to, or perceived as, a success factor for implementing and deploying server virtualization for consolidation purposes, and if not, what other decision areas affect Server Virtualization and power consumption reduction, respectively. The conclusions from our research are that there is a difference of opinion regarding how to factor power consumption reduction from server equipment, both from promoters and deployers. However, it was a common view that power consumption reduction was usually achieved, but not necessarily considered, and thus not evaluated, as a success factor, nor that actual power consumption was measured or monitored after server virtualization deployment. We found that other factors seemed more important, such as lower cost through higher physical machine utilization, simplified high availability and disaster recovery capabilities

Virtual Satisfaction of Human With the Need in Attribute of Things

In the real world, the entity and attributes of an object are unified. It is generally believed that inseparability of entity and attributes is fully embodied in the energy character of the object. Although entity and attributes are inseparable, it is likely to realize the relevant separation of entity and attributes by means of virtual reality technology (VRT). As a matter of fact, this kind of separation means relative separation of entity and attributes with virtual reality technology as the medium. This is of great significance as it enables people to get satisfied with their desire to perceive attributes of an object, and it is a way to satisfy people’s infinite desire by technology. With the swift progress of this technology, all kinds of limitations in the real environment successfully break through and the degree of human freedom is greatly improved

A contribution to the improvement of the Bodum Data Center

This work was developed to support an internal project at Bodum Portuguesa, Produção de Artigos Metálicos, SA. Bodum is a multinational company offering customers coffee, tea, and home accessories solutions according to Bodum’s values. Bodum is a company that creates products with excellent design at affordable prices, based on the principle that ”form follows functionality,” keeping sustainability, environmental responsibility, and the well-being of its employees and the planet in mind. Bodum’s current CEO, Peter Bodum, has said, “Good design does not have to be expensive”. This project aims to solve the problem of obsolete servers, the lack of resources, and the waste of processing power on Bodum’s servers. Today they have servers with OS Windows 2008 R2, which is quite old. Insufficient resources slow the servers regarding performance, processing, and communication. With this project, the company will gain more efficient servers. It will also be possible to have current services and applications with greater capacity and performance, which is an immediate need. The project involves migrating six physical servers in Switzerland, Denmark, Australia, the United States of America, Japan, and China. This project aims to improve the perfor mance of those servers while migrating to new servers with the latest operating systems version and more advanced hardware. There is a need to do this migration to ensure better performance of the servers and better control. The new servers are already purchased and placed in their respective locations, and some are already in use, making this migration more complicated than usual. Simply, it is necessary to migrate the old servers to the new ones. After analyzing the scenario, an improvement proposal was made since the servers are not virtualized. A request was made to the company administration proposing to virtualize the new servers before migration. This request is still awaiting a response. If this request is accepted, the new servers will become virtual machines, and the old servers will migrate to the new ones. If the request to virtualize the servers is refused, the migration will still be made to the new servers without virtualizing them. Furthermore, after performing the mentioned migration, a proposal will be made to mi grate the information system infrastructure to a cloud. This proposal includes an analysis of the company’s current system and a comparison with an identical scenario hosted on a cloud providing the company with all the necessary information about the processes and procedures of migration to the cloud. If the company plans to move services to the cloud, it will already have all the information it needs. The implementation of the Cloud infrastructure and the respective migration of the whole system is left for future work if the company’s board of directors agrees. This thesis will undoubtedly serve as a basis for its implementation.RESUMO:Atualmente existe um projeto interno na empresa Bodum Portuguesa, Produção de Ar tigos Metálicos, SA. A Bodum é uma empresa multinacional que oferece soluções de café, chá e acessórios para casa para todos os tipos de clientes de acordo com os valores da Bodum. A Bodum é uma empresa que cria produtos com excelente design a preços acessíveis, com base no princípio de que “a forma segue a funcionalidade”, mantendo a sustentabilidade, a responsabilidade ambiental e o bem-estar de seus colaboradores e o planeta em mente. Como o atual CEO da Bodum, Peter Bodum, disse “Bom design não tem de ser caro”. Este projeto visa solucionar o problema de os servidores serem obsoletos, a falta de recursos e também o desperdicio da capacidade de processamento. Atualmente os servi dores da Bodum ainda possuem Windows server 2008 R2, que é bastante antigo e a falta de recursos resulta em fraco desempenho dos servidores e até falhas. Com o desenvolvimento deste projeto, a empresa vai ficar com servidores mais atuais e por consequência mais eficientes, também vai ser possível usufruir de serviços com mais funcionalidades isto com uma maior capacidade de processamento e armazenamento, o que no imediato é uma necessidade da empresa. O projeto consiste na migração de seis servidores físicos, localizados na Suíça, Dina marca, Austrália, Estados Unidos da América, Japão e China. Este projeto visa melhorar a desempenho de servidores da empresa, pois a migração irá ser feita para novos servi dores com versões mais atuais do sistema operativo e também com hardware mais recente e avançado. Esta migração é necessária no sentido de garantir melhor desempenho dos servidores e controlo. Neste momento, os novos servidores já foram adquiridos e colo cados nos respetivos locais e alguns dos servidores até já estão a ser utilizados, o que tornará essa migração um pouco mais complexa do que o normal. Na perspetiva da empresa o objetivo principal deste projeto é migrar tudo o que está nos servidores antigos para os novos. Depois de uma breve análise ao sistema da Bodum, foi feita uma proposta de melhoria, uma vez que os servidores não são virtualizados. Com o propósito de melhorar o sistema existente, foi feita uma proposta de virtualização dos novos servidores antes de se realizar a migração, caso a proposta de virtualização dos servidores seja aceite, primeiro os servidores serão virtualizados e só depois é que será feita a migração dos servidores antigos para os novos já virtualizados. Caso o pedido para a virtualização dos servidores acima mencionados seja recusado, a migração será realizada de forma direta de servidor físico para servidor físico. Após realizar a migração mencionada, vai ser feita uma proposta para migrar as in fraestruturas do sistema de informação da Bodum para uma nuvem. Será feito uma análise do sistema atual e uma comparação com um cenário idêntico na nuvem. Com isto, a empresa vai ter em sua posse todas as informações necessárias sobre os processos e procedimentos de migração para a nuvem. No futuro, se a empresa pretender migrar os serviços para a nuvem, já terá o conhecimento para o fazer. No que diz respeito a uma migração para a nuvem de toda a infraestrutura da empresa, essa etapa será para realizar como trabalho futuro caso a empresa assim o entenda. Este projeto vai servir, sem dúvida, de base para a sua implementação