Laboratorio remoto eLab3D: un mundo virtual inmersivo para el aprendizaje de la electrónica

En este artículo se presenta un recurso educativo novedoso, basado en un laboratorio remoto, que permite a los estudiantes, a través de Internet, la realización de experimentos reales en el área de la electrónica. Se ha creado un mundo virtual 3D donde los usuarios, a través de sus avatares, pueden interaccionar con réplicas virtuales de instrumentos, placas de circuitos, componentes o cables y con compañeros y profesores, de forma similar a como lo harían en un laboratorio presencial. Este recurso ofrece múltiples posibilidades que pueden ser muy útiles en los diferentes niveles educativos. Se han llevado a cabo algunas experiencias educativas de utilización de la plataforma con el fin de valorar sus posibilidades docentes y los resultados obtenidos han sido muy positivos. ABSTRACT. This paper presents an innovative educational resource, based on a remote laboratory, which allows users to conduct real experiments through Internet in the area of electronics. A 3D virtual world has been created in which users, by means of their avatars, can interact with virtual replicas of instruments, circuit boards, components or cables and with peers and teachers, as they would in a traditional laboratory. This resource offers multiple possibilities that can be very useful in the different education levels. Some educative experiences have been carried out using the platform to evaluate its educational possibilities and the obtained results have been very positive.

The interaction of the general anesthetic etomidate with the γ-aminobutyric acid type A receptor is influenced by a single amino acid

The γ-aminobutyric acid type A (GABAA) receptor is a transmitter-gated ion channel mediating the majority of fast inhibitory synaptic transmission within the brain. The receptor is a pentameric assembly of subunits drawn from multiple classes (α1–6, β1–3, γ1–3, δ1, and ɛ1). Positive allosteric modulation of GABAA receptor activity by general anesthetics represents one logical mechanism for central nervous system depression. The ability of the intravenous general anesthetic etomidate to modulate and activate GABAA receptors is uniquely dependent upon the β subunit subtype present within the receptor. Receptors containing β2- or β3-, but not β1 subunits, are highly sensitive to the agent. Here, chimeric β1/β2 subunits coexpressed in Xenopus laevis oocytes with human α6 and γ2 subunits identified a region distal to the extracellular N-terminal domain as a determinant of the selectivity of etomidate. The mutation of an amino acid (Asn-289) present within the channel domain of the β3 subunit to Ser (the homologous residue in β1), strongly suppressed the GABA-modulatory and GABA-mimetic effects of etomidate. The replacement of the β1 subunit Ser-290 by Asn produced the converse effect. When applied intracellularly to mouse L(tk−) cells stably expressing the α6β3γ2 subunit combination, etomidate was inert. Hence, the effects of a clinically utilized general anesthetic upon a physiologically relevant target protein are dramatically influenced by a single amino acid. Together with the lack of effect of intracellular etomidate, the data argue against a unitary, lipid-based theory of anesthesia.

Curvature Induced by Amyloplast Magnetophoresis in Protonemata of the Moss Ceratodon purpureus1

After gravistimulation of Ceratodon purpureus (Hedw.) Brid. protonemata in the dark, amyloplast sedimentation was followed by upward curvature in the wild-type (WT) and downward curvature in the wwr mutant (wrong way response). We used ponderomotive forces induced by high-gradient magnetic fields (HGMF) to simulate the effect of gravity and displace the presumptive statoliths. The field was applied by placing protonemata either between two permanent magnets at the edge of the gap, close to the edge of a magnetized ferromagnetic wedge, or close to a small (<1 mm) permanent magnet. Continuous application of an HGMF in all three configurations resulted in plastid displacement and induced curvature in tip cells of WT and wwr protonemata. WT cells curved toward the HGMF, and wwr cells curved away from the HGMF, comparable to gravitropism. Plastids isolated from protonemal cultures had densities ranging from 1.24 to 1.38 g cm−3. Plastid density was similar for both genotypes, but the mutant contained larger plastids than the WT. The size difference might explain the stronger response of the wwr protonemata to the HGMF. Our data support the plastid-based theory of gravitropic sensing and suggest that HGMF-induced ponderomotive forces can substitute for gravity.

A sanção jurídica da sociedade

A teoria dos sistemas sociais autorreferenciais é uma teoria sociológica inovadora. Na verdade, trata-se de uma superteoria baseada em premissas construtivistas que se pretende universal, ou seja, capaz de descrever qualquer fenômeno social, incluindo as teorias rivais. O criador da teoria, o sociólogo alemão Niklas Luhmann, escreveu obras sobre uma grande variedade de temas: desde do Direito até a Arte; de uma teoria geral dos sistemas sociais até uma teoria abrangente da sociedade. Como uma teoria de base construtivista, a teoria dos sistemas sociais autorreferenciais observa observações, mais especificamente, observa comunicações. A teoria adota, assim, um fundamento teórico singular que exige novas descrições dos fenômenos sociais, ainda que já tenham sido exaustivamente estudados. Esse é o caso de sanções legais. Luhmann, contudo, não fornece uma descrição sistêmica das sanções legais. Ao invés disso, usa o termo de maneiras diferentes em seus estudos. As sanções a que ele se refere em seus estudos sobre o sistema político parecem estar mais relacionadas à violência física do que aquelas que ele mencionou ao descrever o sistema jurídico. Esta indefinição é, provavelmente, fruto do que chamei \"noção comum de sanção\". A noção comum, menos do que um conceito de sanção, é o acumulado de séculos de esforços para definir medidas de controle social. Portanto, além de vaga, a noção comum de sanção é baseada em premissas que são estranhas à teoria dos sistemas sociais. Assim, é necessária uma nova descrição dos fenômenos sociais associados à noção comum de sanção, a fim de expandir as possibilidades da teoria dos sistemas sociais. A observação desses fenômenos do ponto de vista da teoria dos sistemas sociais autorreferenciais resultou na descrição de não apenas uma, mas de quatro estruturas sociais diferentes. A primeira foi identificada como sanção simbiótica e pode ser tanto negativa - se associada ao uso da violência - como positiva - se associado à satisfação das necessidades. A segunda é o programa do sistema jurídico que cumpre a função de memória no sistema, mantendo assim as expectativas normativas. A terceira estrutura é uma variação da segunda; são programas oriundos dos processos legais que também cumprem função de memória. Estes programas diferem das sanções simbióticas na distância do uso da violência física. Enquanto a sanção simbiótica demonstra claramente a sua conexão com a violência frente à desobediência, os programas apontam para outros programas sancionatórios antes de se referirem à violência física. De um modo muito diferente, o quarto tipo de estrutura social, os programas sancionatórios de exclusão, identificados com as penas privativas de liberdade, estão intimamente ligados à violência física. Estes programas, embora realizem também a função de memória, cumprem outra função: a gestão de exclusão na sociedade moderna.

Universidades corporativas e vantagens competitivas: um estudo multicaso em franquias brasileiras

O conhecimento tem se mostrado como uma importante fonte de vantagem competitiva para as organizações. Por isso, as empresas buscam, cada vez mais, mecanismos que alavanquem os processos de geração, gestão e disseminação do conhecimento organizacional. Uma das ferramentas, que pode potencializar a transformação do conhecimento em vantagens competitivas, é a universidade corporativa. Nesse contexto, as franquias surgem como um dos objetos de estudos que podem ajudar a explicar esta relação, pois desenvolver e compartilhar conhecimento são aspectos vitais para o franchising. Dessa forma, o principal objetivo deste trabalho é identificar elementos que possam influenciar na geração de vantagens competitivas pela implantação e gestão de universidades corporativas no franchising. Para atingir esses objetivos, foi desenvolvida uma revisão teórica focada nos conceitos de vantagens competitivas, universidades corporativas e franchising. O primeiro esforço mostrou que existe uma lacuna teórica no tema, indicando a necessidade de se realizar um estudo de campo para aprofundar o conhecimento sobre o fenômeno estudado. O estudo de caso, em conjunto com entrevistas em profundidade, foram os métodos escolhidos para realizar o objetivo proposto. Foram realizadas dez entrevistas em profundidade com especialistas em educação corporativa e no franchising, sendo levantadas informações secundárias dos processos de educação do Giraffas e das Universidades Corporativas do Banco do Brasil, Ernest Young do Brasil, Cacau Show e McDonald\'s do Brasil. Para as duas últimas empresas foram desenvolvidos estudos de caso, levantando-se informações comparativas dos seus principais concorrentes. Dessa forma, também foram analisadas informações da Chocolates Brasil, Kopenhagen, Bob\'s e Subway. As principais conclusões do trabalho foram: as universidades corporativas podem impactar de forma expressiva no desenvolvimento de vantagens competitivas no franchising; apesar de as franquias promoverem diversas ações educacionais, as universidades corporativas ajudam a organizar de forma estratégica essas ações, gerando, nos casos estudados, mais impactos que as ações isoladas; as ações que mais geram resultados e barreiras à imitação são as relacionadas à disseminação do conhecimento tácito; a relação entre unidades próprias e franqueadas parece ser importante para se estabelecer estratégias educacionais da rede; a avaliação dos impactos dos treinamentos nos resultados operacionais e financeiros é uma grande dificuldade observada; a literatura preconiza uma relação entre unidades próprias e franqueadas nos estágios de maior maturidade do negócio que não foi observada nos casos estudados; também não foram observadas uma preocupação acentuada com o envolvimento de outros stakeholders e com a busca efetiva de modelos de autofinanciamento.

Impacto de las instalaciones sobre el desempeño del sector hotelero español

El sector hotelero, productor primario del sector turístico, tiene una gran relevancia para la economía española. Sin embargo, está inmerso en un entorno global y está sujeto a fuertes cambios. Por lo tanto, ante esta situación de incertidumbre, el sector hotelero debe identificar y analizar cuáles son sus fuentes de ventaja competitiva para mejorar su competitividad futura y adaptarse correctamente a los retos de su entorno. En este estudio, realizado desde la Teoría de Recursos, se argumenta la importancia de las instalaciones hoteleras y se ofrecen múltiples razones para que sean consideradas fuente de ventaja competitiva para mejorar la capacidad de competir de los hoteles. De esta forma, en esta investigación empírica, se realiza un estudio descriptivo del nivel de desarrollo de las instalaciones hoteleras y se demuestra que tienen un impacto significativo sobre el desempeño que alcanzan los hoteles de tres a cinco estrellas de toda España.

The economic and financial crisis in Russia – background, symptoms and prospects for the future. OSW Report 02/2015

The crisis in Russia’s financial market, which started in mid-December 2014, has exposed the real scale of the economic problems that have been growing in Russia for several years. Over the course of the last year, Russia’s basic macroeconomic indicators deteriorated considerably, the confidence of its citizens in the state and in institutions in charge of economic stability declined, the government and business elites became increasingly dissatisfied with the policy direction adopted by the Kremlin, and fighting started over the shrinking resources. According to forecasts obtained from both governmental and expert communities, Russia will fall into recession in 2015. The present situation is the result of the simultaneous occurrence of three unfavourable trends: the fact that the Russian economy’s resource-based development model has reached the limits of its potential due to structural weaknesses, the dramatic decline in oil prices in the second half of 2014, and the impact of Western economic sanctions. Given the inefficiency of existing systemic mechanisms, in the coming years the Russian leadership will likely resort to ad hoc solutions such as switching to a more interventionist “manual override” mode in governing the state. In the short term, this will allow them to neutralise the most urgent problems, although an effective development policy will be impossible without a fundamental change of the political and economic system in Russia.

Report of the proceedings of commencement week sessions of the Alumni Association and alumni directory

The issue for 1890 does not have title page.

Proceedings at the meeting of the Alumni Association of the University of Illinois.

The issue for 1898/1899 does not have a title page.

Premature deindustrialization in Latin America

Defining deindustrialization as a situation of falling share of manufacturing employment and value added in total employment and GDP, respectively, and a rising specialization in primary goods, this paper provides an empirical analysis of the recent (and in some cases historical) path of four Latin American countries (Argentina, Brazil, Chile and Mexico), contributing to the debate on the matter of premature deindustrialization. We argue that Argentina, Brazil and Chile face premature deindustrialization, increasing their specialization in commodities, resource-based manufactures and low productivity services, while Mexico urges a deeper analyze of its structure.

Systemic absorptive capacity: creating early-to-market returns through R&D alliances

For most complex emergent technologies, product-market success depends on efficient linkages between changing lead innovators within the R&D process. In this paper, our unit of analysis is a complex high technology product and the system of alliance linkages formed to progress a product through R&D milestones. We present a model and evidence for advancing our understanding of how achieving early-to-market returns depends on systemic absorptive capacity. This systemic absorptive capacity is the cumulative efficiency in the use of absorptive capacity to link changing lead innovators across successive milestones in R&D product development. We advance propositions of how systemic absorptive capacity can explain performance differences between rival product development systems competing for early-to-market returns with similar products through accelerating speed to market, cost and quality advantages. These explanations are contrasted with the conclusions of previous studies that have focused on absorptive capacity of single firms or single alliances in RD.

Institutional governance systems and variations in national competitive advantage: An integrative framework

Creating competitive industries has become one of the key tasks of governments. Different adaptation outcomes in industries across nations cannot be accounted for fully simply by an emphasis on firm-level capabilities, market-driven policies, or state-level policies. We propose an integrative framework that draws on both the strategic management and political economy literature to explain variations in national industrial competitiveness.. We discuss differences with respect to institutional characteristics and capabilities, competitive outcomes, conditions of best fit, and who bears the cost of industry adaptation.

Understanding sociocognitive space of written discourse: Implications for teaching business writing to Chinese students

Confronted with various issues in teaching business writing to Chinese students in New Zealand, this paper sees the need for bridging the gap between genre-based research and teaching in an intercultural context. Specifically, it develops an intercultural reflective model in the light of Bhatia's sociocognitive genre study as well as cross-cultural persuasion. As an important part of the model, New Zealand and Chinese experts' intracultural and intercultural reflections on business writing are solicited and compared and the theoretical implications for teaching and learning business writing are discussed. It has been found, through a case study of analysing English and Chinese business faxes, this model can offer an in-depth understanding about discursive competence across cultures, and provide a link between genre-based theory, teaching practice and professional expertise.

An examination of the dynamic relationship between self-efficacy and performance across levels of analysis and levels of specificity

This research used resource allocation theory to generate predictions regarding dynamic relationships between self-efficacy and task performance from 2 levels of analysis and specificity. Participants were given multiple trials of practice on an air traffic control task. Measures of task-specific self-efficacy and performance were taken at repeated intervals. The authors used multilevel analysis to demonstrate differential and dynamic effects. As predicted, task-specific self-efficacy was negatively associated with task performance at the within-person level. On the other hand, average levels of task-specific self-efficacy were positively related to performance at the between-persons level and mediated the effect of general self-efficacy. The key findings from this research relate to dynamic effects - these results show that self-efficacy effects can change over time, but it depends on the level of analysis and specificity at which self-efficacy is conceptualized. These novel findings emphasize the importance of conceptualizing self-efficacy within a multilevel and multispecificity framework and make a significant contribution to understanding the way this construct relates to task performance.

The communication rights in the information society (CRIS) campaign: Applying social movement theories to an analysis of global media reform

Social movement theories offer useful conceptual and analytical tools to the study and research of global media reform movements. This article is a critical analysis of the Communication Rights in the Information Society (CRIS) campaign. It explores its successes and blind-spots in the light of social movement theory, in particular resource mobilization theory (RMT), and offers practical directions for the movement to move on from where it is to where it ought to be.