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Gonzalez Garcia Diego,Gonzalez Ruiz,Diego 한국스페인어문학회 2009 스페인어문학 Vol.0 No.51
En estas breves paginas queremos exponer el desarrollo que del espacio arquitectonico de las Moradas teresianas, y en lo que se refiere a la cerca, engaste o muralla del Castillo interior, realiza Fray Juan de Rojas en sus Representaciones misticas, como consecuencia de la utilizacion del sistema mnemotecnico. Mientras en Santa Teresa podemos observar una muralla apenas esbozada, dentro de esa correlacion de espacios/lugares y etapas de la vida espiritual y de oracion (expresadas en variopintas imagenes), en Rojas comprobaremos su construccion minuciosa, donde las imagenes agentes, bajo la forma de estatuas emblematizadas de los sentidos, constituyen las piezas memoristicas fundamentales que rematan la arquitectura de las cinco portadas sobre las cinco puertas de los cinco sentidos corporales en esa cerca, y por las que se accede al alma. Un claro esquema de agregacion simbolica. El ejercicio, la accion, de cada una de las imagenes senala el cuidado y la dinamica a seguir en la lucha ascetica contra la sensualidad, en el camino mistico de la espiritualidad barroca. Confirmamos, con la mayor precision arquitectonica del lugar y de las imagenes percusivas de Rojas, las teorias que ya expusieron de manera general, siguiendo la obra de F. Yates, los pioneros F. J. Chorpenning y M. Gerli, en el ambito norteamericano, y A. Egido y F. R. de la Flor, en Espana, sobre la estructuracion mnemotecnica de las Moradas de Santa Teresa.
Study of TiCN Aditions to an 2xxx Series Aluminium Alloy
Ruiz-Navas E.M.,Delgado Tienda M.L.,Benito Gonzalez S.,Gordo E. 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
The increasing demand of PM parts for automobile and aerospace applications has caused a strong development of the aluminium based metal matrix composites (MMCs).Aluminium alloys are one of most widely used materials as matrix in MMCs, both in research and development as well as in industrial applications. In the present work, the influence of the ceramic reinforcement addition to a 2xxx series aluminium alloy is studied. Several percentages of TiCN have been added to the Al-Cu alloy using PM techniques, in order to analyze its influence on the liquid phase sintering process and on the final properties of the material.
( Paola Ruiz-romero ),( Benjamin Valdez-salas ),( Daniel Gonzalez-mendoza ),( Vianey Mendez-trujillo ) 한국균학회 2018 Mycobiology Vol.46 No.1
In the present study, the characterization and properties of silver nanoparticles from Yucca shilerifera leaf extract (AgNPs) were investigated using UV-visible spectroscopic techniques, zeta potential, and dynamic light scattering. The UV-visible spectroscopic analysis showed the absorbance peaked at 460 nm, which indicated the synthesis of silver nanoparticles. The experimental results showed silver nanoparticles had Z-average diameter of 729nm with lower stability (195.1mV). Additionally, our dates revealed that AgNPs showed broad spectrum antagonism (p_.05) against Fusarium solani (83.05%) and Macrophomina phaseolina (67.05%) when compared to the control after nine days of incubation. Finally, AgNPs from leaf extracts of Y. shilerifera may be used as an agent of biocontrol of microorganism of importance. However, further studies will be needed to fully understand the agronanotechnological potentialities of AgNPs from Yucca schidigera.
Effect of laser shock peening and cold expansion on fatigue performance of open hole samples
Rubio-Gonzalez, Carlos,Gomez-Rosas, G.,Ruiz, R.,Nait, M.,Amrouche, A. Techno-Press 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.53 No.5
Mechanical fastening is still one of the main methods used for joining components. Different techniques have been applied to reduce the effect of stress concentration of notches like fastener holes. In this work we evaluate the feasibility of combining laser shock peening (LSP) and cold expansion to improve fatigue crack initiation and propagation of open hole specimens made of 6061-T6 aluminum alloy. LSP is a new and competitive technique for strengthening metals, and like cold expansion, induces a compressive residual stress field that improves fatigue, wear and corrosion resistance. For LSP treatment, a Q-switched Nd:YAG laser with infrared radiation was used. Residual stress distribution as a function of depth was determined by the contour method. Compact tension specimens with a hole at the notch tip were subjected to LSP process and cold expansion and then tested under cyclic loading with R=0.1 generating fatigue cracks on the hole surface. Fatigue crack initiation and growth is analyzed and associated with the residual stress distribution generated by both treatments. It is observed that both methods are complementary; cold expansion increases fatigue crack initiation life, while LSP reduces fatigue crack growth rate.
Effect of laser shock peening and cold expansion on fatigue performance of open hole samples
Carlos Rubio-Gonzalez,G. Gomez-Rosas,R. Ruiz,M. Nait,A. Amrouche 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.53 No.5
Mechanical fastening is still one of the main methods used for joining components. Different techniques have been applied to reduce the effect of stress concentration of notches like fastener holes. Inthis work we evaluate the feasibility of combining laser shock peening (LSP) and cold expansion to improve fatigue crack initiation and propagation of open hole specimens made of 6061-T6 aluminum alloy. LSP is a new and competitive technique for strengthening metals, and like cold expansion, induces a compressive residual stress field that improves fatigue, wear and corrosion resistance. For LSP treatment, a Q-switched Nd:YAG laser with infrared radiation was used. Residual stress distribution as a function of depth was determined by the contour method. Compact tension specimens with a hole at the notch tip were subjected to LSP process and cold expansion and then tested under cyclic loading with R=0.1 generating fatigue cracks on the hole surface. Fatigue crack initiation and growth is analyzed and associated with the residual stress distribution generated by both treatments. It is observed that both methods are complementary; cold expansion increases fatigue crack initiation life, while LSP reduces fatigue crack growth rate.
Matus-Aragon, Miguel Angel,Gonzalez-Ceron, Fernando,Salinas-Ruiz, Josafhat,Sosa-Montes, Eliseo,Pro-Martinez, Arturo,Hernandez-Mendo, Omar,Cuca-Garcia, Juan Manuel,Chan-Diaz, David Jesus Asian Australasian Association of Animal Productio 2021 Animal Bioscience Vol.34 No.11
Objective: The study aimed to evaluate the productive performance, carcass yield, size of digestive organs and nutrient utilization in Mexican Creole chickens, using four diets with different concentrations of metabolizable energy (ME, kcal/kg) and crude protein (CP, %). Methods: Two hundred thirty-six chickens, coming from eight incubation batches, were randomly distributed to four experimental diets with the following ME/CP ratios: 3,000/20, 2,850/19, 2,700/18 and 2,550/17. Each diet was evaluated with 59 birds from hatching to 12 weeks of age. The variables feed intake (FI), body weight gain (BWG), feed conversion (FC), mortality, carcass yield, size of digestive organs, retention of nutrients, retention efficiency of gross energy (GE) and CP, and excretion of N were recorded. Data were analyzed as a randomized block design with repeated measures using the GLIMMIX procedure of SAS, with covariance AR (1) and adjustment of degrees of freedom (Kendward-Roger), the adjusted means were compared with the least significant difference method at a significance level of 5%. Results: The productive performance variables BWG, mortality, carcass yield, fat and GE retention and excretion of N were not different (p>0.05) due to the diet effect. In the 3,000/20 diet, the chickens had lower values of FI, FC, crop weight, gizzard weight, retention, and retention efficiency of CP (p<0.05) than the chickens of the 2,550/17 diet. Conclusion: The Mexican Creole chickens from hatching to 12 weeks of age can be feed with a diet with 2,550 kcal ME and 17% CP, without compromising productive parameters (BWG, mortality, carcass yield) but improving retention and retention efficiency of CP.
Comparison of physicochemical pretreatments of banana peels for bioethanol production
Sócrates Palacios,Héctor A. Ruiz,Rodolfo Ramos-Gonzalez,José Martínez,Elda Segura,Miguel Aguilar,Antonio Aguilera,Georgina Michelena,Cristóbal Aguilar,Anna Ilyina 한국식품과학회 2017 Food Science and Biotechnology Vol.26 No.4
Pretreatments with different concentrations of sulfuric acid (0, 0.5, and 1% v/v) and temperatures (28 and 121 C at 103 kPa in an autoclave) were performed on banana peels (BP) milled by mechanical grinding and grinding in a blender as well as without grinding. Cellulose, hemicellulose, lignin, ash, and total and reducing sugar contents were evaluated. The highest yields of cellulose enzymatic hydrolysis (99%) were achieved with liquefied autoclaved BP treated with 0.5 and 1% acid after 48 h of hydrolysis. Ethanol production by Kluyveromyces marxianus fermentation was assayed using hydrolyzed BP at 10, 15, and 20% (w/w). The highest ethanol level (21 g/ L) was reached after 24 h of fermentation with 20% (w/w) BP. Kinetics of the consumption of reducing sugars under this fermentation condition demonstrates the presence of a lag period (about 8 h). Thus, BP are a good source for ethanol production.
Study for the Development of Fe-NbC Composites by Advanced PM Techniques
Gordo E.,Gomez B.,Gonzalez R.,Ruiz-Navas E.M. 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
The development of Fe-based metal matrix composites (MMCs) with high content of hard phase has been approached by combining the use of advanced powder metallurgy techniques like high-energy milling (HEM), cold isostatic pressing (CIP) and vacuum sinterings. A 30% vol. of NbC particles was mixed with Fe powder by HEM in a planetary mill during 10h, characteristing the powder by the observation of morphology and microstructure by scanning electron microscopy (SEM). After of sintering process the variation of density, hardness,carbon content and the microstructural changes observed, permits to find the optimal conditions of processing. Afterwards, a heat treatment study was performed to study the hardenability of the composite.