oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 2 )

2019 ( 305 )

2018 ( 362 )

2017 ( 357 )

Custom range...

Search Results: 1 - 10 of 215774 matches for " Martín Paredes-Flores "
All listed articles are free for downloading (OA Articles)
Page 1 /215774
Display every page Item
Estudio etnobotánico de Zapotitlán Salinas, Puebla
Martín Paredes-Flores,Rafael Lira Saade,Patricia D. Dávila Aranda
Acta botánica mexicana , 2007,
Abstract: En este trabajo se documenta el papel y potencial de los recursos vegetales de Zapotitlán Salinas, Puebla, una comunidad de origen popoloca, ubicada en la porción más árida del Valle de Tehuacán-Cuicatlán. En total, se encontraron 298 especies divididas en 82 familias, y se presenta información etnobotánica de 288 especies pertenecientes a 219 géneros y 79 familias, cuyos usos se ubican en 19 categorías. De ellas, 164 prosperan en las distintas comunidades vegetales naturales de la zona y en algunas de las áreas transformadas, mientras que 124 se encuentran de manera exclusiva en los huertos. Las familias con mayor número de especies útiles fueron Poaceae (35 spp.), Cactaceae (24 spp.) y Asteraceae (23 spp.). En cuanto a las formas de vida, la mayor parte (162 spp.) son las herbáceas, seguida de los arbustos (86 spp.) y los árboles (41 spp.). El trabajo incluye información acerca de la disponibilidad espacial y temporal de las especies útiles, así como también de la importancia relativa de las de mayor interés para la población local, como son las combustibles, las medicinales, las alimenticias y las forrajeras
http://www.economistascoruna.org/eawp/eawp.asp?qsa=ES&qsb=1&qsc=191&qsd=199
Martín Montalva Paredes
Economic Analysis Working Papers , 2007,
Abstract: Las Tecnologías de Información y Comunicaciones (TIC′s) están redefiniendo parte de los patrones conductuales que regulan la interacción social. El tiempo y el espacio han dejado de ser un límite en el accionar tanto de las personas, empresas y gobiernos. A nivel mundial la brecha entre los países desarrollados y en vías de desarrollo se ha ampliado en los últimos a os, debido en gran parte a la masificación del uso de tecnologías. En empresas TIC′s, específicamente empresas desarrolladoras de software, tanto chilenas como canadienses, se verificó el uso que hacen éstas del Marketing Estratégico como una herramienta competitiva, a la hora de planificar la operación y continuidad.
Marginal discrepancy and microleakage in crown-copings fabricated by three CAD/CAM systems: An in vitro study  [PDF]
Marcela Herrera, Alfonso Catalán, Maritza Flores, Alejandra Martínez
Open Journal of Stomatology (OJST) , 2012, DOI: 10.4236/ojst.2012.23030
Abstract: The purpose of this study was to evaluate and compare the microleakage and marginal discrepancy of ceramic crown-copings fabricated by three different CAD/CAM systems. Material and methods: Thirty extracted premolars were prepared for complete all-ceramic crowns with: total convergence 10-degree, 2 mm occlusal reduction, 4.5 mm height, 1.3 mm circular reduction and chamfer marginal preparation. They were divided into three groups and each group (n = 10) received a ceramic crown-coping fabricated by one of three CAD/CAM systems: Procera, KaVo Everest and Cerec inLab. The copings were cemented with Panavia F 2.0. After thermal cycling, the teeth were immersed in 2% basic fuchsine dye for 24 hours. Microleakage was scored using a five-point scale and evaluated under a stereomicroscope at ×18. Marginal discrepancies were assessed with scanning electronic microscope at ×150, with measurements at 50 different points. Data were subjected to a chisquare test, Kolmogorov-Smirnov test and using Rho Spearman’s correlation test (P < 0.05). Results: Cerec inLab CAD/CAM crown-copings showed significant microleakage compared to Procera and KaVo Everest (P = 0.031). No significant differences were observed between Procera and the KaVo Everest system (P > 0.05). No significant differences were found in marginal discrepancies for the Procera (62.58 ± 8.98 μm) and KaVo Everest systems (65.54 ± 18.56 μm), (P = 0.941). Significant differences were found for Cerec inLab (132.18 ± 27.75 μm) compared with Procera and KaVo Everest (P = 0.0001). No correlation between the marginal discrepancies and microleakage for the three CAD/CAM crown-copings systems. Conclusions: Cerec inLab CAD/CAM crown-copings showed significantly higher values for microleakage and marginal discrepancy in comparison with Procera and KaVo Everest CAD/CAM crown-copings.
Ven y Vamos a Conocer el Mundo del Calor y del Frío
Martín García Flores
Acta Universitaria , 2012,
Abstract: García-Colín, S., Leopoldo. De la máquina de vapor al cero absoluto (Calor y entropía). México: (SEP; FCE; CONACYT), 2000. (La Ciencia para todos; 5).
Sobre la atrofia de los órganos durante la inanición About organ atrophy during starvation
G. Martín Pe?a,N. Paredes de Dios
Nutrición Hospitalaria , 2007,
Abstract:
Evaluación financiera del valor generado por un sistema de información en una empresa de transportes
Sosa San Martín,Pedro Manuel; Alfaro Paredes,Emigdio Antonio;
Ingeniare. Revista chilena de ingeniería , 2011, DOI: 10.4067/S0718-33052011000300013
Abstract: in this study was evaluated the financial results after the implantation of an information system for selling shipping of packages, developed in-house in an inter-carrier charge in lima through the variation of procedure 059 of maigti methodology, which suggests the evaluation of the net present value considering additional incomes (contribution margin and savings) and additional expenses (additional investments and additional expenditures) with a discount rate in a evaluation period similar to long term planning period according to the type of entity in which the evaluation was realized. the implantation of the information system of packages shipping obtained s/. 138,070 new soles (approximately us$ 48,446) as net present value after the first year, and s/. 1,178,996 new soles (approximately us$ 413,683) as net present value after the third year, due the increment of loyalty of clients through the reduction of time to 70% in the emission of bills and for avoiding losses due a proportion of clients didn't hire the service because the emission of bills was manual. also, the study demonstrates that the variation of procedure 059 of the maigti methodology is valid for the evaluation of financial return of an information system in a transport firm.
La actividad física: una vía para mejorar los síntomas durante el climaterio
Quintero Paredes,Pedro P; Pérez Martín,Martha M;
Revista de Ciencias M??dicas de Pinar del R?-o , 2008,
Abstract: a descriptive and longitudinal study was carried out in all patients in the climateric stage who attended the gynecology office at "luis augusto turcios lima" out-patient clinic in pinar del río during january 1 to december 31 ,2005. the universe and sample were based on a total of 200 patients who were registered and followed. data were processed by percentage analysis. patients with spontaneous menopause attended the climacteric office more frequently than those women with surgical menopause. the short-term symptoms were the most present in these women . women in this stage do not receive a proper familiar support and the most used therapy is the combined one, with insufficient use of physical activity and sport. most women do not receive any help from a physical culture professional in spite of their interest in these activities in this stage of life.
La actividad física: una vía para mejorar los síntomas durante el climaterio Physical activity as a way to improve the symptoms during the climacteric
Pedro P Quintero Paredes,Martha M Pérez Martín
Revista de Ciencias M??dicas de Pinar del R?-o , 2008,
Abstract: Se realizó un estudio descriptivo y longitudinal de todas las pacientes en la etapa climatérica que asistieron a la consulta de Ginecología del Policlínico Universitario "Luis Augusto Turcios Lima" del municipio Pinar del Río, del 1ro de enero al 31 de diciembre del 2005. El universo y la muestra lo constituyeron el total de pacientes en etapa climatérica que asistieron a esta consulta, que fueron 200 pacientes que se les llenó la historia clínica y dio seguimiento en consulta. Los datos se procesaron mediante análisis porcentual. Las pacientes que asistieron con más frecuencia a la consulta de climaterio fueron las que tuvieron una menopausia espontánea seguida de las de causa artificial. Los síntomas que más aquejan a estas pacientes son los agrupados a corto plazo. Las mujeres en esta etapa no reciben un adecuado apoyo familiar y la terapia más usada es la combinada, con un uso insuficiente de la actividad física y el deporte. La mayoría de las mujeres no reciben ayuda de un profesional de la cultura física, y tienen gran interés en pertenecer a grupos especializados de mujeres en esta etapa. A descriptive and longitudinal study was carried out in all patients in the climateric stage who attended the Gynecology office at "Luis Augusto Turcios Lima" Out-patient Clinic in Pinar del Río during January 1 to December 31 ,2005. The universe and sample were based on a total of 200 patients who were registered and followed. Data were processed by percentage analysis. Patients with spontaneous menopause attended the climacteric office more frequently than those women with surgical menopause. The short-term symptoms were the most present in these women . Women in this stage do not receive a proper familiar support and the most used therapy is the combined one, with insufficient use of physical activity and sport. Most women do not receive any help from a physical culture professional in spite of their interest in these activities in this stage of life.
Evaluación financiera del valor generado por un sistema de información en una empresa de transportes Financial evaluation of the value generated by an information system in a transport firm
Pedro Manuel Sosa San Martín,Emigdio Antonio Alfaro Paredes
Ingeniare : Revista Chilena de Ingeniería , 2011,
Abstract: En este estudio se evaluó el retorno financiero de la implantación de un sistema de información de venta de envío de paquetes (encomiendas) desarrollado in-house en una empresa de transporte interprovincial de carga en Lima mediante la variación del procedimiento 059 de la metodología MAIGTI, el cual sugiere evaluar el valor actual neto considerando ingresos adicionales (margen de contribución adicional y ahorros) y egresos adicionales (inversiones adicionales y gastos adicionales) con una tasa mínima atractiva de retorno en un período de evaluación similar al período de planificación de largo plazo según el tipo de entidad en que se realizó la evaluación. La implantación del sistema de información de encomiendas dio como resultado para el primer a o un valor actual neto de S/. 138.070 nuevos soles (aproximadamente US$ 48.446) y llegando para el tercer a o a un valor actual neto de S/. 1.178.996 nuevos soles (aproximadamente US$ 413.683), gracias al aumento de la lealtad del cliente debido a una reducción del tiempo al 70% en la emisión de comprobantes y evitar pérdidas debido a que una proporción de los clientes no contrataban el servicio porque la emisión de facturas era manual. El estudio demostró también que la variación del procedimiento 059 de la metodología MAIGTI es válida para la evaluación del retorno financiero de un sistema de información en una empresa de transportes. In this study was evaluated the financial results after the implantation of an information system for selling shipping of packages, developed in-house in an inter-carrier charge in Lima through the variation of procedure 059 of MAIGTI methodology, which suggests the evaluation of the net present value considering additional incomes (contribution margin and savings) and additional expenses (additional investments and additional expenditures) with a discount rate in a evaluation period similar to long term planning period according to the type of entity in which the evaluation was realized. The implantation of the information system of packages shipping obtained S/. 138,070 new soles (approximately US$ 48,446) as net present value after the first year, and S/. 1,178,996 new soles (approximately US$ 413,683) as net present value after the third year, due the increment of loyalty of clients through the reduction of time to 70% in the emission of bills and for avoiding losses due a proportion of clients didn't hire the service because the emission of bills was manual. Also, the study demonstrates that the variation of procedure 059 of the MAIGTI methodology is valid for the evaluat
Laparoscopic Trainer with Pneumoperitoneum  [PDF]
José L. Ortiz Simón, Arturo Minor Martínez, Neftalí Prado Coronado, Ricardo Ordorica Flores
Surgical Science (SS) , 2012, DOI: 10.4236/ss.2012.310099
Abstract: The development of skills and abilities in laparoscopy is directly related to the use of trainers. The trainer should model the patient with all its natural complexities as closely as possible. In this article we propose a system for training the establishment of pneumoperitoneum executing the basic tasks to create the workspace in the trainer, the insertion of primary umbilical trocar and simulate some of the everyday problems in surgery. Materials and Methods. A group of electrical with biomedical engineers and laparoscopic surgeons developed a physical trainer that allows implementing the pneumoperitoneum. The system uses pneumatic electro valves that are controlled with a dedicated microprocessor. The user can program the system to set the parameters of the pneumoperitoneum. Results. This new trainer facilitated the programming of right values of parameters to distend the abdominal cavity according a specific clinical case. The model developed enables the trainee to consolidate his knowledge on establishing the parameters required within clinical practice, as well as the entry techniques. Conclusions. A new physical model for laparoscopic training was designed. The system enables the laparoscopic surgeon to set the parameters for establishing the workspace according to the clinical case. The trainer allows the surgeon to train in the Hasson technique for the introduction of the first trocar, as well as the placement of the rest of surgical instruments with video assistance. We think this new trainer system will help minimize entry-related injuries.
Page 1 /215774
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.