Tool for fast mismatch analysis of analog circuits

A tool is presented that evaluates statistical deviations in performance characteristics of analog circuits, starting from statistical deviations in the technological parameters of MOS transistors. Performance is demonstrated via the analysis of a Miller OTA in two different configurations and a linearized CMOS transconductor. The CPU time is reduced by a factor of 25 to 90 with respect to conventional Monte Carlo simulation, while maintaining similar accuracy in the computations

Global design of analog cells using statistical optimization techniques

We present a methodology for automated sizing of analog cells using statistical optimization in a simulation based approach. This methodology enables us to design complex analog cells from scratch within reasonable CPU time. Three different specification types are covered: strong constraints on the electrical performance of the cells, weak constraints on this performance, and design objectives. A mathematical cost function is proposed and a bunch of heuristics is given to increase accuracy and reduce CPU time to minimize the cost function. A technique is also presented to yield designs with reduced variability in the performance parameters, under random variations of the transistor technological parameters. Several CMOS analog cells with complexity levels up to 48 transistors are designed for illustration. Measurements from fabricated prototypes demonstrate the suitability of the proposed methodology

"The Incubators of Ideas: First Step to the Entrepreneurial University"

En la actualidad, las Universidades han pasado de ser instituciones netamente docente e investigadora, a ser unas instituciones emprendedoras encaminadas a dar solución a problemas que afectan a la sociedad, como parte de su compromiso para con esta última. Nuestra universidad no se encuentra ajena a esta política. No obstante, nuestros científicos necesitan una cultura económica que los ayude a insertar sus investigaciones dentro del mercado, para evitar correr el riesgo de que sus ideas sean “robadas” por agentes oportunistas. En este contexto surge el proyecto INCUBA.UHHU como incubadora de ideas, en colaboración con la Universidad de Humboldt de Berlín, con el objetivo fomentar la innovación y la creación de valor en aras de desarrollar nuevos negocios y fortalecer los vínculos con las empresas. Nuestra facultad ha participado en varias de las rondas de incubación que se han desarrollado y en todas las ocasiones a los equipos les ha sido de gran provecho ya que han logrado crear lo que se conoce como su plan de negocios. A pesar de esto, INCUBA aún es poco conocida -y, por tanto, poco explotada- entre los estudiantes y profesores, por lo que se pretende mostrar cómo la incubación de una simple idea, nos puede llevar a un producto final de alto valor agregado, siempre que se cuente con la asesoría adecuada.Today, Universities have gone from being purely teaching and research institutions, to entrepreneurial institutions aimed at solving problems affecting society, as part of their commitment to the latter. Our university is no stranger to this policy. However, our scientists need an economic culture that helps them insert their research into the market, to avoid risking their ideas being "stolen" by opportunistic agents. In this context the INCUBA project arises. UHHU as an incubator of ideas, in collaboration with Humboldt University in Berlin, with the aim of fostering innovation and creating value in order to develop new businesses and strengthen links with companies. Our faculty has participated in several of the incubation rounds that have been developed and on all occasions the teams have been very helpful as they have managed to create what is known as their business plan. Despite this, INCUBA is still little known - and therefore little exploited - among students and teachers, so it is intended to show how the incubation of a simple idea can lead us to a final product of high added value, provided that we have the advisor to proper

The DNA Repair Protein XRCC1 Functions in the Plant DNA Demethylation Pathway by Stimulating Cytosine Methylation (5-meC) Excision, Gap Tailoring, and DNA Ligation

Background: Active DNA demethylation in plants is initiated by 5-meC DNA glycosylases of the ROS1/DME family and continued through a base excision repair pathway. Results: XRCC1 stimulates ROS1-initiated demethylation and is required for efficient processing of post-excision intermediates. Conclusion: XRCC1 functions at several stages during active DNA demethylation. Significance: This study identifies a new component of the active DNA demethylation pathway in Arabidopsis

Peri-Urban Organic Agriculture and Short Food Supply Chains as Drivers for Strengthening City/Region Food Systems-Two Case Studies in Andalucia, Spain

Discussions on food security in the Global North have raised questions about the capacity of peri-urban organic agriculture to provide sufficient healthy food for the urban market. Dealing with food security requires more attention to how to protect peri-urban organic farming systems from urban pressures while strengthening the sustainability of local food systems. Given that short food supply chains (SFSCs) have been proven to be effective at reconnecting people with food production, this study focuses on identifying the barriers that hinder their development and the opportunities derived from the comparative advantage provided by their urban proximity. This study is based on documentary and empirical research addressing food supply chain characteristics in the organic sector. This study is focused on Mediterranean peri-urban agriculture, where, historically, there have been close relationships between the city and the countryside. These relationships are based on the fact that many cities are traditionally located next to areas of high agricultural activity, where a wide variety of vegetables is produced almost continuously due to the relatively mild winter climate. This study deals with two medium-sized metropolitan areas in Andalucía in the south of the Iberian Peninsula—the coastal city of Málaga, which is of a tourist-residential nature, and the inland urban agglomeration of Granada. Our research shows, when compared with other studies, that the local organic food sector seems to have great potential to find innovative solutions based on a collective approach, local embeddedness, and collective knowledge and by prioritizing horizontal and sustainable processes at the local/regional scale.Spanish project SAMUTEREuropean Agricultural Fund for Rural Development (EAFRD)Spanish Ministry of Agriculture, Fisheries, Foodstu ffs and the Environmen

Educação familiar para a estimulação psicomotora de escolares surdocegos da Atividade Física Adaptada (Original)

A Educação Física é um processo pedagógico que joga um papel importante na formação integral dos alunos, sendo a inclusão de alunos com necessidade educativa especial um tema de máxima actualidade, visto que, desenvolvem as capacidades físicas e as habilidades de cada desporto, em um contexto que favorece a socialização de estes alunos e a comunicação com os que apresentam NEE, o problema esta dado em a não incorporação de alunos com discapacidade motora nas aulas de Educação Física, portanto o objectivo do trabalho é desenhar jogos adaptados para a inclusão de aluno com discapacidade motora nas aulas de Educação Física, visto que os jogos servem como meio de exercitação dos conteúdos da disciplina em estudo, para tal utilizou-se como população 25 alunos da turma F, 10ª classe, sendo seleccionado de forma intencional uma amostra de 10 alunos com discapacidade motora, o que representa 40% da população. Os resultados obtidos na presente investigação favorecerão a inclusão de aluno com discapacidade motora nas aulas de Educação Física; Além de proporcionar um materiar de apoyo aos professionais con jogos adaptados pelo cada trimestre.A Educação Física é um processo pedagógico que joga um papel importante na formação integral dos alunos, sendo a inclusão de alunos com necessidade educativa especial um tema de máxima actualidade, visto que, desenvolvem as capacidades físicas e as habilidades de cada desporto, em um contexto que favorece a socialização de estes alunos e a comunicação com os que apresentam NEE, o problema esta dado em a não incorporação de alunos com discapacidade motora nas aulas de Educação Física, portanto o objectivo do trabalho é desenhar jogos adaptados para a inclusão de aluno com discapacidade motora nas aulas de Educação Física, visto que os jogos servem como meio de exercitação dos conteúdos da disciplina em estudo, para tal utilizou-se como população 25 alunos da turma F, 10ª classe, sendo seleccionado de forma intencional uma amostra de 10 alunos com discapacidade motora, o que representa 40% da população. Os resultados obtidos na presente investigação favorecerão a inclusão de aluno com discapacidade motora nas aulas de Educação Física; Além de proporcionar um materiar de apoyo aos professionais con jogos adaptados pelo cada trimestre

Gestión del conocimiento enfocado a la competitividad en Empresas Familiares Turísticas (EFT) de Guanajuato, México

Knowledge management in Family Tourism Businesses (FTB) represents a critical process towards competitiveness. This research aims to know how knowledge management practices are related to the levels of competitiveness in the FTB of the city of Guanajuato, Mexico. Considering the Intelligent Organization Model, a quantitative approach was conducted through the application of questionnaires (104) to owners, family members, managers and employees of 18 FTB. This model is contrasted with the evidence of the results, concluding that there is a framework to determine the degree of knowledge management to lead these companies towards competitiveness, where they can create, develop, disseminate and optimize all activities within, in order to generate value by encouraging learning and the sharing of knowledge and experience as competitive advantages.La gestión del conocimiento en Empresas Familiares Turísticas (EFT) representa un proceso crítico hacia la competitividad. Esta investigación tiene por objetivo conocer cómo se relacionan las prácticas de gestión del conocimiento con los niveles de competitividad en las EFT de la ciudad de Guanajuato, México. Considerando el Modelo de Organización Inteligente, se condujo una aproximación cuantitativa mediante la aplicación de cuestionarios (104) a propietarios, familiares, gerentes y empleados de 18 EFT. Se contrastó dicho modelo con las evidencias de los resultados, concluyendo que se cuenta con un marco para determinar el grado de gestión del conocimiento para conducir a estas empresas hacia la competitividad, donde puedan crear, desarrollar, difundir y optimizar todas las actividades dentro, generando así, valor al fomentar el aprendizaje e incentivando a compartir el conocimiento y la experiencia como ventajas competitivas

Concepciones teóricas para el trabajo de las capacidades coordinativas especiales en aulas de Educación Física para alumnos con deficiencia auditiva en Angola

The purpose of this article is to present the theoretical aspects to be considered by Physical Education teachers from Lubango, Huila, who work with students who present problems in the development of coordinative capacities. The considerations are the starting point of several investigations that contribute to the training of these teachers and an improvement in the programs of this Angolan context. It is undoubtedly a theoretical knowledge that enriches the work of the teacher, who, in addition to his practical class, must work on other subjects. Addressing this type of population where there is a lack of theoretical methodological references is the starting point to methodologically transform the work of capacities.O objetivo deste artigo é apresentar os aspectos teóricos a serem considerados pelos professores de Educação Física do Lubango, Huila, que trabalham com alunos que apresentam problemas no desenvolvimento das capacidades coordenativas. As considerações são o ponto de partida de várias investigações que contribuem para a formação destes professores e um aperfeiçoamento dos programas deste contexto angolano. É sem dúvida um conhecimento teórico que enriquece o trabalho do professor, que, além da aula prática, deve trabalhar outras disciplinas. Abordar este tipo de população onde faltam referenciais teórico-metodológicos é o ponto de partida para transformar metodologicamente o trabalho de capacidades

Insuficiencias en la preparación estadística del estudiante de medicina

Fundamento: la preparación estadística del futuro profesional de medicina resulta esencial para su desempeño profesional. Objetivo: identificar insuficiencias en relación con la preparación estadística del estudiante de medicina en el ciclo clínico de la carrera. Métodos: investigación pedagógica realizada en la Facultad de Ciencias Médicas de Sancti Spíritus durante el período de tiempo comprendido entre septiembre de 2013 y julio de 2015. Incluyó un análisis documental que abarcó los trabajos investigativos presentados en el Forum Científico Estudiantil y que respaldaron sus resultados en la aplicación de herramientas estadísticas. También se diseñó una prueba pedagógica y un cuestionario con el propósito de complementar y enriquecer la evidencia obtenida sobre la preparación estadística del estudiante de medicina, variable principal del estudio. Ambos instrumentos se aplicaron en una muestra conformada por 88 estudiantes del ciclo clínico de la carrera. Los resultados se presentan en tablas de distribución de frecuencias. Resultados: en el 81,4 % de los trabajos se aplicaron los recursos estadísticos sin previa justificación. Predominó el empleo de recursos descriptivos (92,6 %) aunque solo el 40,7 % hizo un uso integrado de estos. El 78,4 % de los estudiantes que realizaron la prueba pedagógica evidenciaron una baja preparación estadística; predominaron las dificultades al identificar el diseño de los estudios. Conclusiones: los estudiantes de la carrera de medicina en el ciclo clínico de la Facultad de Ciencias Médicas de Sancti Spíritus presentan limitaciones en su preparación estadística. Se recomienda realizar estudios orientados a indagar en los factores potencialmente causales

Nanostructured Ti thin films by magnetron sputtering at oblique angles

The growth of Ti thin films by the magnetron sputtering technique at oblique angles and at room temperature is analysed from both experimental and theoretical points of view. Unlike other materials deposited in similar conditions, the nanostructure development of the Ti layers exhibits an anomalous behaviour when varying both the angle of incidence of the deposition flux and the deposition pressure. At low pressures, a sharp transition from compact to isolated, vertically aligned, nanocolumns is obtained when the angle of incidence surpasses a critical threshold. Remarkably, this transition also occurs when solely increasing the deposition pressure under certain conditions. By the characterization of the Ti layers, the realization of fundamental experiments and the use of a simple growth model, we demonstrate that surface mobilization processes associated to a highly directed momentum distribution and the relatively high kinetic energy of sputtered atoms are responsible for this behaviourJunta de Andalucía P12-FQM- 2265Ministerio de Ciencia e Innovación CSD2008- 00023, MAT2013-42900-P, MAT2013-40852-R, MAT2014-59772-C2-1, MAT2011- 2908