SUBNATIONAL DYNAMICS IN NORTH AMERICA: PARADIPLOMACY OF CANADIAN PROVINCES

Víctor Hugo Guzmán Horta(Víctor Hugo Guzmán Horta ) 한국캐나다학회 2022 Asia-Pacific Journal of Canadian Studies (APJCS) Vol.28 No.2

Mechanical properties related to the microstructure of seven different fiber reinforced composite posts

Víctor Alonso de la Peña,Iria L Darriba,Martín Caserío Valea,Francisco Guitián Rivera 대한치과보철학회 2016 The Journal of Advanced Prosthodontics Vol.8 No.6

PURPOSE The aim of this in vitro study was to evaluate the mechanical properties (bending strength and hardness) of seven different fiber reinforced composite posts, in relation to their microstructural characteristics. MATERIALS AND METHODS Two hundred eighty posts were divided into seven groups of 40, one group for each type of post analyzed. Within each group, 15 posts were subjected to three-point bending strength test, 15 to a microhardess meter for the Knoop hardness, and 10 to Scanning Electron Microscope in order to determine the diameter of the fibers and the percentage of fibers embedded in the matrix. To compare the flexural strength in relation to the type of fiber, matrix, and the hardness of the posts, a Kruskal-Wallis H test was used. The Jonckheere-Terpstra test was used to determine if the volume percent of fibers in the post influenced the bending strength. RESULTS The flexural strength and the hardness depended on the type of fibers that formed the post. The lower flexural strength of a post could be due to deficient bonding between the fiber and the resin matrix. CONCLUSION According to the results, other factors, besides the microstructural characteristics, may also influence the mechanical properties of the post. The feature that has more influence on the mechanical properties of the posts is the type of fiber.

Classical Plasmonics: Wave Propagation Control at Subwavelength Scale

Víctor Coello,Cesar E. Garcia-Ortiz,Manuel Garcia-Mendez 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.7

In this paper, surface plasmons polariton propagation and manipulation is reviewed in the context of experiments and modeling of optical images. We focus our attention in the interaction of surface plasmon polaritons with arrays of micro-scatereres and nanofabricated structures. Numerical simulations and experimental results of different plasmonic devices are presented. Plasmonic beam manipulation opens up numerous possibilities for application in biosensing, nanophotonics, and in general in the area of surface optics properties.

Model of Interaction for Academia-Industry-Government to promote the development of human resources in Information Technologies using E-learning

Lourdes-Sánchez-Guerrero,Víctor Gómez-Quintero,Mariem Henaine-Abed,Juan Contreras-Castillo,Ricardo Acosta-Díaz APEC국제교육협력원 2008 Asia-Pacific Cybereducation Journal Vol.4 No.2

정전분무법에 의한 결함없는 ZIF-7 박막의 제조

Víctor Manuel Aceituno Melgar,김진수 한국막학회 2013 멤브레인 Vol.23 No.4

ZIF 재료는 독특한 기체 분리 특성을 포함한 물리적, 화학적 특성 때문에 큰 관심을 받아왔다. 본 연구에서는 α-alumina 지지체 위에 결함 없고 연속적인 ZIF-7 막을 형성하는 새롭고 효율적인 방법이 연구되었다. 지지체 위에 시딩 (seeding)을 하지 않고 직접 ZIF-7 박막을 합성하는데 정전분무법이 처음으로 적용되었다. 이 방법은 전구체 용액을 직접 정 전분무함으로 α-alumina 지지체에 ZIF-7 박막을 형성할 수 있었다. ZIF-7 박막은 XRD, FE-SEM, 단일 기체 투과 장치 등을 이용해 분석하였다. Zeolitic imidazolate frameworks (ZIFs) have been the focus of interest for their physical and chemical properties, especially, for their extraordinary gas separation properties. In this study, a novel and efficient method for the fabrication of continuous ZIF-7 film on α-alumina substrate has been investigated. The electrospray deposition method was tried for the first time to prepare ZIF films directly without the necessity of prior substrate seeding. It has the advantage of depositing thin ZIF-7 films directly on the α-alumina substrate by electrospraying the precursor solution. The ZIF-7 films have been characterized through XRD, FE-SEM, and single gas permeation tests.

Retrato de un mundo extraño

Víctor Camprubí Telo,María Laura Grosso 한국외국어대학교 중남미연구소 2009 중남미연구 Vol.27 No.2

Las denominaciones de los géneros y las clasificaciones en grupo de ciertas obras o discursos con ciertas características particulares atienden a recortes que pueden responder a ciertos cánones. La convención genérica implica la existencia de clases de textos cuya aparición y reconocimiento se recorta de una tradición cultural. Esta tradición define el horizonte de expectativas de aquel que produce y aquel que recepta una determinada obra. Ese horizonte, sin embargo, no necesariamente alcanza para representar. Entonces, a partir de esa tradición las búsquedas literarias tienden a tensionar las convenciones para encontrar los modos que mejor expresen la “realidad”. Este trabajo, entonces, incursiona en las tensiones de la tradición genérica que la obra de Armonía Sobres realiza para poder expresar una denuncia, representar una realidad y construir un universo literario tan particular como problemático. Las denominaciones de los géneros y las clasificaciones en grupo de ciertas obras o discursos con ciertas características particulares atienden a recortes que pueden responder a ciertos cánones. La convención genérica implica la existencia de clases de textos cuya aparición y reconocimiento se recorta de una tradición cultural. Esta tradición define el horizonte de expectativas de aquel que produce y aquel que recepta una determinada obra. Ese horizonte, sin embargo, no necesariamente alcanza para representar. Entonces, a partir de esa tradición las búsquedas literarias tienden a tensionar las convenciones para encontrar los modos que mejor expresen la “realidad”. Este trabajo, entonces, incursiona en las tensiones de la tradición genérica que la obra de Armonía Sobres realiza para poder expresar una denuncia, representar una realidad y construir un universo literario tan particular como problemático.

Zn-22Al-2Cu Alloy Phase Transformations at Different Homogenizing Temperatures

Héctor Javier Dorantes-Rosales,Víctor Manuel López-Hirata,Ramón Esquivel-González,Jorge Luis González-Velazquez,Joel Moreno-Palmerin,Antonio Torres-Castillo 대한금속·재료학회 2012 METALS AND MATERIALS International Vol.18 No.3

The effect of the homogenizing temperature on phase transformations and hardening behavior was studied in a Zn-22Al-2Cu (wt%) alloy homogenized for 7 days at 315, 350, and 390°C. The homogenized alloy was subsequently quenched and aged naturally at room temperature or artificially at 200°C for different time periods. The β phase was unstable at room temperature and it decomposed through the β→α+ηreaction during natural aging. An increase in the homogenizing temperature caused a decrease in the kinet-ics of the decomposition of the β phase in the alloy. Natural aging also caused an increase in the hardness due to the formation of nanometric grains with α and η phases and the presence of an intermetallic εphase. This result agrees with the time exponents (n) between 1.5 and 2.6, which were obtained using the Johnson-Mehl-Avrami-Kolmogorov equation for the decomposition of the β phase. The transformed frac-tion curves exhibited the fastest and slowest growth kinetics of the â phase decomposition at homogeniz-ing temperatures of 350 and 390°C, respectively. The artificial aging induced the formation of equilibrium phases and began a decrease in hardness due to the coarsening process of the equilibrium α, η, and τ'phases.

The effect of water status on productive and fl owering variables in young ‘Arbequina’ olive trees under limited irrigation water availability in a semiarid region of Chile

Víctor Beyá-Marshall,Julio Herrera,Thomas Fichet,Eduardo R. Trentacoste,Cristián Kremer 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.6

The intense drought aff ecting olive production in Northern Chile underscores the need to research non-traditional irrigationstrategies to obtain the best crop performance. Accordingly, this study aimed to obtain preliminary data to guide futureresearch on this topic. Diff erent water replenishment levels on crop evapotranspiration (ET c ; 13.5, 27.0, 40.5, and 54%)were established in a young orchard, cv. Arbequina, from the end of fruit drop (EFD) to full bloom in the next season. Weevaluated the infl uence of plant water status (Ψ stem ) and crop load, considered as function of fruit number divided by trunkcross-sectional area, on reproductive and productive variables using multiple linear regressions. Our results show that cropload and Ψ stem measured from EFD to harvest affected yield components. Nevertheless, Ψ stem had the strongest infl uenceon fruit size, pulp development, oil accumulation, and yield. Oil content and yield were reduced by 54% and 50% for eachMPa, respectively, from Ψ stem EFD-H − 1.8 MPa, an effect that intensifi ed as crop load increased. During the period of fl owerdevelopment (September–November), the number of flowers per infl orescence and percentage of perfect flowers were reducedwhen Ψ stem was less than − 2.0 MPa. These preliminary results showed that bud differentiation, infl orescence and flowerformation are highly sensitive to water deficit. The intense drought aff ecting olive production in Northern Chile underscores the need to research non-traditional irrigationstrategies to obtain the best crop performance. Accordingly, this study aimed to obtain preliminary data to guide futureresearch on this topic. Diff erent water replenishment levels on crop evapotranspiration (ET c ; 13.5, 27.0, 40.5, and 54%)were established in a young orchard, cv. Arbequina, from the end of fruit drop (EFD) to full bloom in the next season. Weevaluated the infl uence of plant water status (Ψ stem ) and crop load, considered as function of fruit number divided by trunkcross-sectional area, on reproductive and productive variables using multiple linear regressions. Our results show that cropload and Ψ stem measured from EFD to harvest affected yield components. Nevertheless, Ψ stem had the strongest infl uenceon fruit size, pulp development, oil accumulation, and yield. Oil content and yield were reduced by 54% and 50% for eachMPa, respectively, from Ψ stem EFD-H − 1.8 MPa, an effect that intensifi ed as crop load increased. During the period of fl owerdevelopment (September–November), the number of flowers per infl orescence and percentage of perfect fl owers were reducedwhen Ψ stem was less than − 2.0 MPa. These preliminary results showed that bud differentiation, infl orescence and flower formation are highly sensitive to water deficit.

Skin temperature response to unilateral training measured with infrared thermography

Víctor L. Escamilla-Galindo,Alejandro Estal-Martínez,Jakub G. Adamczyk,Ciro José Brito,Javier Arnaiz-Lastras,Manuel Sillero-Quintana 한국운동재활학회 2017 JER Vol.13 No.5

El negacionismo en la historia de España

Víctor Camprubí Telo 한국스페인어문학회 2010 스페인어문학 Vol.0 No.57

El presente artículo trata sobre diferentes autores de obras referentes esencialmente a la historia contemporánea de España. Tales autores tienen diferentes rasgos comunes que permite identificarlos como un colectivo con ideas y objetivo claramente identificables. Pese a fundamentarse en teorías ya superadas, su actividad es reciente, y no existe una postura claramente compartida por los científicos acreditadossobre ellos. De hecho, ni siquiera hay consenso sobre como referirse a ellos en cuanto a colectivo. Nuestro objetivo principal es pues el de identificar y catalogar esos autores y su obra. Para ello se analizan su génesis, sus teorías, su método, sus objetivos… Todo ello se realiza desde una reflexión profunda de la naturaleza científica de la historia como disciplina, a fin de demostrar que este colectivo es ajeno a ella. Incluye el trabajo una propuesta de denominación: la de negacionistas. Para ello se estudia la negación como término de trabajo historiográfico, y su posible aplicación en este caso.