596 research outputs found
Free Industrial Zones: Law and Industrial Development in the New International Division of Labor
Holographic s+p Superconductors
We study the phase diagram of a holographic model realizing a U(2) global
symmetry on the boundary and show that at low temperature a phase with both
scalar s and vector p condensates exists. This is the s+p-wave phase where the
global U(2) symmetry and also the spatial rotational symmetry are spontaneously
broken. By studying the free energy we show that this phase is preferred when
it exists. We also consider unbalanced configurations where a second chemical
potential is turned on. They present a rich phase diagram characterized by the
competition and coexistence of the s and p order parameters.Comment: 6 pages, 4 figures; v3: published version, clarifications and
references adde
Holographic Type II Goldstone bosons
The Goldstone theorem implies the appearance of an ungapped mode whenever a
continuous global symmetry is spontaneously broken. In general it does not say
anything about the precise form of the dispersion relation nor does it imply
that there is one massless mode for each broken symmetry generator. It is a
well-established fact that even for relativistic field theories in the presence
of a chemical potential Goldstone modes with quadratic dispersion relation, the
type II Goldstone bosons, appear in the spectrum. We develop two holographic
models that feature type II Goldstone modes as part of the quasinormal mode
spectrum. The models are based on simple generalizations with U(2) symmetry of
the well-studied holographic s-wave superfluid. Our results include Goldstone
modes without broken generators but with unusual realization of symmetries and
a frequency dependent conductivity of striking resemblance to the one of
Graphene.Comment: 47 pages, 21 figures; v2: references and clarifications added, typos
correcte
Holographic Superfluids and the Landau Criterion
We revisit the question of stability of holographic superfluids with finite
superfluid velocity. Our method is based on applying the Landau criterion to
the Quasinormal Mode (QNM) spectrum. In particular we study the QNMs related to
the Goldstone modes of spontaneous symmetry breaking with linear and quadratic
dispersions.In the linear case we show that the sound velocity becomes negative
for large enough superfluid velocity and that the imaginary part of the
quasinormal frequency moves to the upper half plane. Since the instability is
strongest at finite wavelength, we take this as an indication for the existence
of an inhomogeneous or striped condensed phase for large superfluid velocity.
In the quadratic case the instability is present for arbitrarily small
superfluid velocity.Comment: 26 pages, 10 Figures; v2: authors's name corrected, reference adde
Zonas Francas Industriales en el Proyecto de Ley General de Comercio Exterior
En este artÃculo se presenta un breve recuento del desarrollo histórico de la institución de las ZFis en el mundo y de la iniciativa para implementarlas en el Perú
Transmisión de la polÃtica monetaria en Colombia: Una aproximación TVP-VAR
El presente trabajo de tesis pretende evaluar cómo ha cambiado el impacto de la polÃtica monetaria en Colombia durante el periodo 2000-2017, mediante el uso de un modelo de parámetros cambiantes de vectores autoregresivos (TVP-VAR). El estudio busca presentar como diversos choques internacionales y entornos económicos podrÃan promover o desincentivar los mecanismos de transmisión de la tasa de interés. Adicionalmente, se pretende comparar los resultados con los modelos VAR tradicionales y también incorporar la estimación de una ecuación de volatilidad estocástica dentro del TVP-VAR. Los principales resultados obtenidos en esta tesis son: i) la significancia estadÃstica de la respuesta de las brechas de PIB, inflación y crédito ha mejorado en los últimos años frente a lo observado al inicio de la muestra, ii) la brecha de crédito es la que mayor impacto recibe ante choques monetarios, lo cual muestra la importancia del canal de crédito en la transmisión de la polÃtica monetaria en Colombia y iii) la reacción de la brecha de inflación ante choques monetarios es mayor en la actualidad, lo que refleja la mayor credibilidad del Banco de la República y la consolidación del esquema de inflación objetivo.Abstract: This thesis evaluates changes in monetary policy impacts on Colombian economy during the period 2000-2017 by using a Vector Autoregressive model with time varying parameters(TVP-VAR). The model seeks to present how various international shocks and economic environments could promote or discourage interest rate transmission mechanisms. Additionally, a comparison between the TVP-VAR and the traditional VAR model is included and also a stochastic volatility equation is incorporated within the TVP-VAR model. The most outstanding results are: i) the statistical significance of the response of the GDP, inflation and credit gaps improved in recent years in comparison with the beginning of the sample, ii) the credit gap has the greatest impact on monetary shocks, which shows the importance of the credit channel in Colombia’s monetary policy transmission and iii) the inflation gap reaction to monetary shocks is greater today, which reflects the greater credibility of the Banco de la República and the consolidation of inflation targeting scheme.MaestrÃ
KINEMATIC ANALYSIS OF KETTLEBELL SWING IN DIFFERENT SURFACES – COMPARISION BETWEEN STABLE AND UNSTABLE SURFACES
The purpose of this study was to characterize the kettlebell swing movement kinematics, and to examine the changes induced by an unstable surface. One experienced subject with a 6kg kettlebell performed 10 kettlebell swings on the floor and 10 on an unstable surface. Optoelectronic system with 6 cameras was used to obtain the 3D analysis. Four variables were selected for this pilot study: the leg-thigh and the thigh-trunk angles when the subject had the maximal knee joint flexion, the arm-trunk angle when the subject was at maximum extension of the knee joint and the duration of the trials. Significant changes induced by the unstable surface were obtained in the four variables selected. Thus, this study presents a simple, operation and low-time consuming process to evaluate the role of unstable surface for fitness exercises. Further studies should deeply examine different surfaces, to clarify its role in rehabilitation programs
Construcción de Hotel de los Inmigrantes y puesta en valor de fachada y construcción Centro de Estudios Terciarios, primera etapa
En el presente informe, se presenta el desarrollo de los distintos trabajos realizados en el marco de las Prácticas Profesionales Supervisadas, llevadas a cabo en la empresa “AMD Urbanizaciones y Construcciones".
Para comenzar, se realizó una breve descripción del lugar de trabajo, para luego abordar los diversos ámbitos en los que se desarrolló la práctica.
Particularmente en este caso, la actividad desempeñada fue la de sobrestante de obra, realizando tareas de medición, supervisión y control, en la cual se debió tener una presencia constante en las edificaciones intervinientes, que se describen a continuación.
Se desarrollaron las siguientes actividades:
Control de ejecución de trabajos.
Control de calidad de trabajos realizados.
Medición de trabajos terminados.
Replanteo y control de niveles.
Recepción y control de materiales.
Cómputo de materiales.
Intermediación con subcontratistasFil: Amado Aranda, Nicolás Daniel. Universidad Nacional de Cuyo. Facultad de IngenierÃa
A importância dos serviços de extensão no ensino de enfermagem : a experiência do Centro de Enfermagem da Católica
Desde Nightingale, o ensino da enfermagem sistematizado promove a aquisição de competências dos estudantes tanto pelo ensino teórico como pelo ensino clÃnico. Neste, o número de horas e o modelo de supervisão adotados foram sendo alterados ao longo do tempo, sendo mais relevantes o acompanhamento dos estudantes na componente prática recorrendo à supervisão direta do docente, à supervisão pelo enfermeiro do local da prática, ao mentorado ou integração em Unidades Dedicadas à Educação.
Com a integração do ensino de enfermagem no ensino superior, a par da formação dos estudantes, as unidades de ensino devem dar resposta à missão de investigação e de extensão comunitária. Em estudos anteriores, sobre contextos e estratégias de ensino clÃnico em enfermagem, verificou-se a necessidade de aprofundar o conhecimento sobre a contribuição que um serviço de extensão poderia ter no ensino. Para prosseguir esse objetivo analisou-se a criação e desenvolvimento do Centro de Enfermagem da Católica (CEC) como serviço de extensão da Escola de Enfermagem – Porto (UCP) e o seu contributo especÃfico para o ensino de enfermagem.
A presente investigação baseou-se no método de estudo de caso e incidiu sobre os dez anos de atividade do CEC (2007-2017). Neste percurso, foram utilizadas fontes documentais associadas ao CEC e conteúdos das entrevistas realizadas a intervenientes chave. Foram utilizadas duas bases teóricas: a proposta por Imogene King, que identifica a Estrutura dos Sistemas de Interação como articulação dinâmica dos sistemas entre si; e a proposta por David Kolb, que defende que a aprendizagem decorre da transformação da experiência. A primeira teoria é proposta como um conjunto que integra desde o indivÃduo até aos sistemas sociais ou comunidades em que se insere e onde se espera encontrar a relação enfermeiro-cliente. A segunda emana do pressuposto de que cada indivÃduo tem potencial de desenvolvimento e o mesmo pode ser promovido pelo uso do pensamento reflexivo.
Os resultados indicam que o CEC, ao ser criado como serviço de extensão para ser local de ensino clÃnico, promoveu a adequada resposta à s necessidades de aprendizagem dos estudantes. Este serviço integra em simultâneo apoio ao ensino, apoio à investigação, prestação de serviços e assessoria. Verificou-se que esta integração permitiu a inovação e orientação das várias vertentes mantendo o alinhamento com a missão, os valores e a visão da instituição em que se insere. Pela atividade realizada nos 10 anos sobressai a aposta na capacitação dos clientes e comunidades mais vulneráveis. A intervenção tem sido realizada através de projetos de intervenção comunitária que responderam adequadamente à s exigências do ensino e investigação, com potencial de melhoria na sistematização do impacto e dos resultados.
Decorre do presente estudo a proposta de integrar no apoio ao ensino a componente do mentorado (também pelos pares); no apoio à investigação um reforço da investigação-ação de Community-based Research. Estas propostas reforçarão o objetivo de produzir e mobilizar conhecimento na e com as comunidades como resposta aos problemas nela encontrados.Since Nightingale, systematized nursing education has encouraged the acquisition of students' competencies through theoretical and clinical teaching. In this process, the number of hours and the supervision model adopted has changed over time. The most important, the monitoring of students in the practical component, can be done by using the direct supervision of the teacher, by the nurse in the place of the practice, mentoring or integration in Dedicated Education Units.
The integration of nursing education in higher education has brought, along with the training of students, the obligation of educational units to research and reach out to the community. Previous studies into nursing clinical teaching contexts and strategies had demonstrated the need to deepen the knowledge of the contribution to teaching that an outreach service could have. The Porto nursing School (UCP) created and developed a Catholic Nursing Centre (CEC) as an extension service. This process was analysed regarding its specific contribution to nursing teaching.
The present research was based on a case study and focused on the ten years of CEC activity (2007-2017). Sources related to CEC as well as the contents from interviews with key players were considered in the research documentary. Two theoretical bases were used: Imogene King’s theory which identifies the structure of interaction systems as a dynamic articulation of the systems between them; David Kolb’s theory which argues that learning stems from the transformation of experience. The first theory is proposed as one that integrates the individual to the social systems or communities in which the nurse-client relationship is found. The second emanates from the assumption that an individual has the potential for development which is encouraged by reflective thinking.
The results indicate that the creation of CEC as an extension service and a place of clinical nursing teaching, was an adequate response to students' learning needs. It was also seen that this service, supports research, nursing services, and counselling, while integrating support for teaching. This also allowed the innovation and orientation in line with the institution's mission, values, and vision. In the ten years of this activity which were studied, it is evident that it empowered the most vulnerable clients and communities This empowerment was based on community intervention projects that adequately respond to the teaching and research requirements. It is also evident that the intervention highlighted the potential for improvement in the systematization of the impact and results.
The purpose of this study is to integrate the mentoring component (also within peers) into teaching support; in research support, to reinforce Community-based Research with the aim of producing and mobilizing knowledge in and with communities as a response to the problems found
Avaliação das Respostas Ruminativas em Adolescentes: qualidades psicométricas da ERR-10-A
Introdução - O principal objetivo do presente estudo é a adaptação e o estudo psicométrico da Escala de Respostas Ruminativas – ERR-10 (Ruminative Response Scale - RRS-10, Treynor, W., Gonzalez, R., & Nolen-Hoeksema, S., 2003) para adolescentes. Uma vez que a revisão da literatura tem evidenciado o caráter promissor do estudo da ruminação, nomeadamente a sua relevância na compreensão da psicopatologia, pretendemos alargar esta área de investigação à adolescência contribuindo com a adaptação desta escala. Método - Fizeram parte da amostra 339 adolescente, dos quais 197 (58%) são raparigas. Os inquiridos apresentam idades compreendidas entre os 12 e os 18 anos e o ano de escolaridade varia entre o 7º e os 12º ano. Além da ERR-10, para o estudo da sua validade convergente e divergente foram usadas as versões portuguesas dos seguintes instrumentos: o Questionário de Regulação Emocional Cognitiva (CERQ- Cognitive Emotion Regulation Questionnaire; Garnefski, N., Kraaij, V., & Spinhoven, P., 2002), o Questionário de Preocupações de Penn Sate para crianças (PSWQ-C - Penn State Worry Questionnaire for Children; Chorpita et al., 1997), e a Escala de Ansiedade Depressão e Stress (DASS 21 - Depression Anxiety Stress Scales; Lovibond & Lovibond, 1995). Resultados - A ERR-10 para adolescentes evidenciou uma estrutura fatorial constituÃda por dois fatores: cismar e reflexivo que explicam 51% da variância. Revelou uma consistência interna adequada, e, à exceção do item 5, todos os outros itens apresentaram boas qualidades psicométricas, atestando assim a fidedignidade da ERR-10-A em adolescentes. Apresentou ainda correlações significativas e no sentido esperado com construtos semelhantes, bem como um padrão diferenciado de associação entre as dimensões da ERR-10-A e os sintomas de psicopatologia. Os valores médios obtidos na ERR-10-A variaram em função do sexo e mostraram-se associados negativamente à idade. Conclusão: Partindo da informação existente em adultos, o contributo do presente estudo consistiu em alargar para adolescentes da população portuguesa a avaliação da ruminação. Os resultados sugeriram que a componente cismar do pensamento ruminativo está mais associada à psicopatologia do que a componente reflexiva e que as raparigas, mais que os rapazes apresentam valores mais altos nessa componente. O estudo psicométrico da ERR-10-A revela que esta se edifica como um instrumento válido e de fácil aplicabilidade, permitindo avaliar a existência dos dois estilos de pensamentos ruminativos, tanto o reflexivo, como o cismar. / The main objective of the present study is the psychometric study and adaptation of the Ruminative Response Scale - RRS-10 (Treynor, W., Gonzalez, R. & Nolen-Hoeksema, S., 2003) for teenagers. A review of the existing literature concluded that the study of rumination is quite promising, especially its relevance to better understand the psychopathology. Therefore, it's pretended that the adaptation of this scale for teenagers may help broaden this field of investigation. Method - The sample was composed by 339 teenagers, of which 197 (58%) are female. The subjects are aged between 12 and 18 years old and their studies range from the 7th to the 12th grade. For the study of it's convergent and divergent validity of the RRS-10, it was used the portuguese versions of CERQ- Cognitive Emotion Regulation Questionnaire (Garnefski, N., Kraaij, V., & Spinhoven, P., 2002); the PSWQ-C - Penn State Worry Questionnaire for Children; (Chorpita et al., 1997); and the DASS 21 - Depression Anxiety Stress Scales (Lovibond & Lovibond,1995). Results - The RSS - 10 for teens had a factorial structure composed by two factors that explain 51% of the variance: brooding and reflexive. It revealed an adequate internal consistency and every item, excepting 5, had good psychometric values, which proves the RSS - 10-A's fidedignity for teens. Significant correlations were found between similar constructs, as well as a differentiated pattern of association between the RSS-10-A's dimensions and psychopathology symptoms. The mean values vary according to genre and were negatively associated with age. Conclusion - The present study aimed at broadening the rumination evaluation to the portuguese teenager population. The results suggest that the brooding component of the ruminative thinking is more associated with psychopathology than the reflexive component, and that girls show higher values than boys, in those components. The psychometric study of the RSS-10-A concludes that this is a valid and easy instrument to apply, to evaluate the existence of two types of ruminative thoughts, both reflexive as brooding
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