Tracker Operation and Performance at the Magnet Test and Cosmic Challenge

During summer 2006 a fraction of the CMS silicon strip tracker was operated in a comprehensive slice test called the Magnet Test and Cosmic Challenge (MTCC). At the MTCC, cosmic rays detected in the muon chambers were used to trigger the readout of all CMS sub-detectors in the general data acquisition system and in the presence of the 4 T magnetic field produced by the CMS superconducting solenoid. This document describes the operation of the Tracker hardware and software prior, during and after data taking. The performance of the detector as resulting from the MTCC data analysis is also presented

Bio-based electrospun fibers for wound healing

Being designated to protect other tissues, skin is the first and largest human body organ to be injured and for this reason, it is accredited with a high capacity for self-repairing. However, in the case of profound lesions or large surface loss, the natural wound healing process may be ineffective or insufficient, leading to detrimental and painful conditions that require repair adjuvants and tissue substitutes. In addition to the conventional wound care options, biodegradable polymers, both synthetic and biologic origin, are gaining increased importance for their high biocompatibility, biodegradation, and bioactive properties, such as antimicrobial, immunomodulatory, cell proliferative, and angiogenic. To create a microenvironment suitable for the healing process, a key property is the ability of a polymer to be spun into submicrometric fibers (e.g., via electrospinning), since they mimic the fibrous extracellular matrix and can support neo- tissue growth. A number of biodegradable polymers used in the biomedical sector comply with the definition of bio-based polymers (known also as biopolymers), which are recently being used in other industrial sectors for reducing the material and energy impact on the environment, as they are derived from renewable biological resources. In this review, after a description of the fundamental concepts of wound healing, with emphasis on advanced wound dressings, the recent developments of bio-based natural and synthetic electrospun structures for efficient wound healing applications are highlighted and discussed. This review aims to improve awareness on the use of bio-based polymers in medical devices

The conformation of myosin head domains in rigor muscle determined by X-ray interference.

In the absence of adenosine triphosphate, the head domains of myosin cross-bridges in muscle bind to actin filaments in a rigor conformation that is expected to mimic that following the working stroke during active contraction. We used x-ray interference between the two head arrays in opposite halves of each myosin filament to determine the rigor head conformation in single fibers from frog skeletal muscle. During isometric contraction (force T-0), the interference effect splits the M3 x-ray reflection from the axial repeat of the heads into two peaks with relative intensity (higher angle/lower angle peak) 0.76. In demembranated fibers in rigor at low force

Aportes de la huerta escolar agroecológica al aprendizaje de niñas y niños en escuelas de Montevideo, a través del Programa Huertas en Centros Educativos

Huertas escolares agroecológicas son herramientas que apuntan a generar múltiples aprendizajes. El Programa Huertas en Centros Educativos es una experiencia que desarrollan la Intendencia de Montevideo, la Administración Nacional de Enseñanza Pública y la Universidad de la República, desde el año 2005. Desarrolla huertas en 53 escuelas primarias. Trabajan en él, 32 orientadores de huerta, con 15.000 niños y 500 maestros, vinculando la huerta a las actividades curriculares. El objetivo general es promover un cambio cultural hacia una nueva forma de dignificar a la persona, en relación con la naturaleza. Busca facilitar aprendizajes curiculares, desarrollar hábitos de trabajo y de alimentación saludable, prácticas agroecológicas y que las mismas lleguen a los hogares. El presente trabajo sistematiza información publicada por el PHCE, tomando como eje los aprendizajes que facilita esta herramienta educativa. Se concluye que la huerta escolar agroecológica es una excelente herramienta pedagógica, facilitando el aprendizaje de contenidos curriculares, el desarrollo de valores y actitudes para la integración social y la educación alimentaria.Agroecological school gardens are tools aimed at generating multiple learning. The school gardening program (PHCE) is an experience that has been developing by Montevideo's local government, the National Administration of Public Education and the University of the Republic, since 2005. It develops orchards in 53 elementary schools. 32 orchard counselors work with 15.000 children and 500 teachers, linking the garden to their curricular activities. The overall objective is to promote a cultural change towards a new form of dignity to the person in connection with nature. The program seeks to facilitate learning, develop work and healthy eating habits, ecological practices and that they reach homes. This paper organizes information published by the PHCE, focusing on the teaching that this educational tool can leave. It is concluded that the agroecological school garden is an excellent educational tool, providing curricular content and development of values and attitudes toward social integration and food and nutrition education.Eje A5: Sistemas de conocimientoFacultad de Ciencias Agrarias y Forestale

Performance studies of the CMS strip tracker before installation

Peer reviewe

Aportes de la huerta escolar agroecológica al aprendizaje de niñas y niños en escuelas de Montevideo, a través del Programa Huertas en Centros Educativos

Huertas escolares agroecológicas son herramientas que apuntan a generar múltiples aprendizajes. El Programa Huertas en Centros Educativos es una experiencia que desarrollan la Intendencia de Montevideo, la Administración Nacional de Enseñanza Pública y la Universidad de la República, desde el año 2005. Desarrolla huertas en 53 escuelas primarias. Trabajan en él, 32 orientadores de huerta, con 15.000 niños y 500 maestros, vinculando la huerta a las actividades curriculares. El objetivo general es promover un cambio cultural hacia una nueva forma de dignificar a la persona, en relación con la naturaleza. Busca facilitar aprendizajes curiculares, desarrollar hábitos de trabajo y de alimentación saludable, prácticas agroecológicas y que las mismas lleguen a los hogares. El presente trabajo sistematiza información publicada por el PHCE, tomando como eje los aprendizajes que facilita esta herramienta educativa. Se concluye que la huerta escolar agroecológica es una excelente herramienta pedagógica, facilitando el aprendizaje de contenidos curriculares, el desarrollo de valores y actitudes para la integración social y la educación alimentaria.Agroecological school gardens are tools aimed at generating multiple learning. The school gardening program (PHCE) is an experience that has been developing by Montevideo's local government, the National Administration of Public Education and the University of the Republic, since 2005. It develops orchards in 53 elementary schools. 32 orchard counselors work with 15.000 children and 500 teachers, linking the garden to their curricular activities. The overall objective is to promote a cultural change towards a new form of dignity to the person in connection with nature. The program seeks to facilitate learning, develop work and healthy eating habits, ecological practices and that they reach homes. This paper organizes information published by the PHCE, focusing on the teaching that this educational tool can leave. It is concluded that the agroecological school garden is an excellent educational tool, providing curricular content and development of values and attitudes toward social integration and food and nutrition education.Eje A5: Sistemas de conocimientoFacultad de Ciencias Agrarias y Forestale

Tracker Operation and Performance at the Magnet Test and Cosmic Challenge

During summer 2006 a fraction of the CMS silicon strip tracker was operated in a comprehensive slice test called the Magnet Test and Cosmic Challenge (MTCC). At the MTCC, cosmic rays detected in the muon chambers were used to trigger the readout of all CMS sub-detectors in the general data acquisition system and in the presence of the 4 T magnetic field produced by the CMS superconducting solenoid. This document describes the operation of the Tracker hardware and software prior, during and after data taking. The performance of the detector as resulting from the MTCC data analysis is also presented