Contrastive grammar : a theory and practice handbook

En consonancia con los lineamientos del programa vigente de Gramática Contrastiva, materia incluida en el programa de estudios del Traductorado de Inglés de la Facultad de Lenguas, Universidad Nacional de Córdoba, el objetivo principal de Contrastive Grammar: A Theory and Practice Handbook es brindar a los estudiantes un manual que combine las gramáticas descriptivas del inglés y del español. No pretende ser una revisión completa de todas las diferencias lingüísticas existentes entre ambas lenguas: por el contrario, el objetivo del presente manual es combinar información teórica clave con prácticas variadas respecto de estructuras dispares que representan la fuente más frecuente de interferencia entre los dos sistemas.Fil: Gómez Calvillo, M. Natalia. Universidad Nacional de Córdoba. Facultad de Lenguas; Argentina.Fil: Meehan, Patricia. Universidad Nacional de Córdoba. Facultad de Lenguas; Argentina.Fil: Díaz, M. Josefina. Universidad Nacional de Córdoba. Facultad de Lenguas; Argentina.Fil: Rolfi, Laura. Universidad Nacional de Córdoba. Facultad de Lenguas; Argentina

A Study of Hybrid Instructional Delivery for Graduate Students in an Educational Leadership Course

This paper describes a qualitative study in which ways to improve instructional delivery for graduate students in an Educational Leadership course in Master of Education program in a predominantly Hispanic university located in South Texas were examined. Questions explored perceptions, attitudes, and reasons for choosing a hybrid instructional delivery model. Five themes emerged from the data: flexibility, assumption of responsibility in learning, emphasis on active learning, building peer relationships, and deepened learning

The role of international and regional powers in Afghanistan. The return of the "great game"

El regreso del movimiento talibán al poder abre una nueva etapa en Afganistán y un escenario renovado para Asia Central. En un primer momento, prácticamente la totalidad de los vecinos afganos recibieron con satisfacción la retirada de los Estados Unidos y de la OTAN; sin embargo, unas escasas semanas después, estos sentimientos permutaron hacia la incertidumbre y desconfianza que genera el primer gobierno talibán en torno al control y estabilización del país. Afganistán puede convertirse en un espacio incontrolado, propicio para las redes del crimen organizado y el terrorismo internacional. Al mismo tiempo, supone una oportunidad para que algunos estados puedan ganar profundidad estratégica y conseguir mayores cuotas de poder en la región. La estabilidad de Afganistán es primordial para que las potencias internacionales y regionales puedan cumplir sus objetivos de ganar profundidad estratégica. La seguridad y el comercio son los sectores clave en la acción exterior de estos estados y Afganistán recobra su papel de peón fundamental en el nuevo Gran Juego de Asia Central del siglo XXI.Taliban have returned to Afghanistan, and it is a new period for the country and Central Asia. Firstly, almost all Afghanistan neighbors received with satisfaction the withdrawal of the United State and NATO; however, these feelings quickly turned into uncertainty and distrust to the first Taliban government. Afghanistan could convert into an uncontrolled space, favorable for crime organizations and international terrorism. At the same time, it is also a new opportunity for some states to gain strategic depth in the region. Afghanistan stability is essential for international and regional powers obtain their goals, mainly, to gain strategic depth. Security and trade are fundamental sectors for these states. Therefore, Afghanistan recovers the role of essential piece in the new Great Game of Central Asia in the 21st Century

Flagellar Motility of Trypanosoma cruzi Epimastigotes

The hemoflagellate Trypanosoma cruzi is the causative agent of American trypanosomiasis. Despite the importance of motility in the parasite life cycle, little is known about T. cruzi motility, and there is no quantitative description of its flagellar beating. Using video microscopy and quantitative vectorial analysis of epimastigote trajectories, we find a forward parasite motility defined by tip-to-base symmetrical flagellar beats. This motion is occasionally interrupted by base-to-tip highly asymmetric beats, which represent the ciliary beat of trypanosomatid flagella. The switch between flagellar and ciliary beating facilitates the parasite's reorientation, which produces a large variability of movement and trajectories that results in different distance ranges traveled by the cells. An analysis of the distance, speed, and rotational angle indicates that epimastigote movement is not completely random, and the phenomenon is highly dependent on the parasite behavior and is characterized by directed and tumbling parasite motion as well as their combination, resulting in the alternation of rectilinear and intricate motility paths

Planning for Free Trade: Taking Advantage of the Transition.

After two decades of restrictive policies regarding foreign involvement, Mexico is transforming its legal and regulatory structure. The progression of foreign investment, technology transfer, and industrial property laws and regulations is revealing. The significance of the overhaul of the industrial property and technology transfer framework in Mexico is evident considering the historical context in which it developed. With these reforms in place, Mexico significantly improved the conditions for placing U.S. franchises across the border. Mexico decreased tariff rates, eliminated import licenses for numerous products, and divested over half of the businesses previously owned or operated by the state. It also tempered restrictions on foreign investment, increased protection of industrial property, and abolished impediments to the transfer of technology. Part II of this Article addresses Mexico’s approach to foreign investment in its economy over a period of approximately seventy years, concluding with the 1989 regulatory enactments by President Salinas. Part III deals specifically with the gradual implementation of restrictions on the transfer of technology and the limitations on industrial property protections. The resulting web of regulations implemented over the years was torn down by the 1991 industrial property law, the specifications of which are discussed in part IV. Concluding remarks are made in part V. The recent initiatives President Salinas took are testimony to the economic transformation underway in Mexico. There is no need to wait on the full realization of a NAFTA. With the reforms the Salinas Administration made, Mexico made itself a more inviting destination for U.S. investors. A corresponding increase in the level of foreign activity in the country shows no signs of reversal. The walls surrounding the business opportunities in Mexico are rapidly disintegrating and, for the well positioned business, the time for expansion is now

Pt-Ru Catalysts supported on mesoporous carbons for polymer electrolyte membrane fuel cells

Pt-Ru electrocatalysts supported on xerogels and CMK-3 ordered mesoporous carbons were synthesized by reduction with formate ions (SFM method). Some of the carbon supports were chemically treated with HNO3 in order to generate oxygen groups on the surface, while other supports were heat treated. Physical characterization of the catalyst was obtained using X-ray dispersive energy (EDX) and X-ray diffraction (XRD) techniques. Results showed that Pt-Ru catalysts with similar metal content (20%) and atomic ratios (Pt:Ru 1:1) were obtained. The electrochemical activity was studied by cyclic voltammetry and chronoamperometry. Higher methanol oxidation current densities were found for catalyst deposited on chemically treated supports. Electrode preparation and MEA assembly allowed an in-house built direct methanol fuel to be fitted with the synthesized catalysts and supports in order to assess their performance. Cell and reactants were conditioned by a direct methanol test station. Polarisation curves were measured and confirmed data obtained by voltammetry, regarding the effect of heat treatment of the carbon support. Normalised power curves per weight of catalyst are discussed in terms of the significant impact on noble metal loading and attained cell maximum power, in comparison with results obtained with a commercial catalyst

Influence of catalyst support characteristics and functionalization on the catalytic activity of Pt-Ru for PEM fuel cells

Pt-Ru electrocatalysts supported on carbon xerogels and ordered mesoporous carbons were synthesized by reduction with formate ions (SFM method). Chemical and heat treatments were applied to modified the surface chemistry of original carbon supports. Physical characterization of the catalysts was performed using X-ray dispersive energy (EDX) and X-ray diffraction (XRD) techniques, while the electrochemical activity towards methanol oxidation was studied by cyclic voltammetry (CV). Pt-Ru catalysts with nominal metal content (20 wt.%) and atomic ratios (Pt:Ru 1:1) were successfully synthesized on the different supports. Higher methanol oxidation current densities were obtained for those supports with a higher content of surface oxygen groups. Gas diffusion electrode and membrane-electrode-assembly preparation allowed an in-house built of a direct methanol fuel monocell for the evaluation of the catalysts performance. Polarization curves were measured confirming the results obtained in a three electrodes electrochemical cell by CV. Normalized power curves per weight of Pt are discussed in terms of the significant impact on noble metal loading and attained cell maximum power, in comparison with results obtained with a commercial catalyst

A successful experimental model for intimal hyperplasia prevention using a resveratrol eluting balloon

Objective: Restenosis due to intimal hyperplasia is a major clinical problem that compromises the success of angioplasty and endovascular surgery. Resveratrol (RSV) has demonstrated a beneficial effect on restenosis from angioplasty. Unfortunately, the physicochemical characteristics of RSV reduce the practicality of its immediate clinical application. This work proposes an experimental model aiming to setup an intravessel, elutable, RSV-containing compound. Methods: A 140 mg/mL RSV sterile injectable solution with a suitable viscosity for intravascular administration by drugdelivery catheter (RSV-c) was prepared. This solution was locally administered in the common iliac artery of adult male New Zealand White rabbits using a dedicated device (Genie; Acrostak, Geneva, Switzerland) after the induction of intimal hyperplasia by traumatic angioplasty. The RSV concentrations in the wall artery were determined, and the thickness of the harvested iliac arteries was measured over a 1-month period. Results: The Genie catheter was applied in rabbit vessels, and the local delivery resulted in an effective reduction in restenosis after plain angioplasty. Notably, RSV-c forced into the artery wall by balloon expansion might accumulate in the interstitial areas or within cells, avoiding the washout of solutions. Magnification micrographs showed intimal proliferation was significantly inhibited when RSV-c was applied. Moreover, no adverse events were documented in in vitro or in vivo studies. Conclusions: RSV can be advantageously administered in the arterial walls by a drug-delivery catheter to reduce the risk of restenosis