Mobile Voices: Projecting the Voices of Immigrant Workers by Appropriating Mobile Phones for Popular Communication

Mobile Voices, also known as VozMob (www.vozmob.net), is a digital storytelling platform for first generation, low-wage immigrants in Los Angeles to create and publish stories about their communities, directly from cell phones. The project is a partnership between the Annenberg School for Communication at the University of Southern California (USC) and the Institute of Popular Education of Southern California (IDEPSCA), a nonprofit that organizes low-income immigrants in Los Angeles. Founded in 1984, IDEPSCA's programs are focused on education, economic development, health access and reform, popular communication, and worker rights. Currently IDEPSCA runs six day laborer and household worker centers and two day laborer corners where workers look for jobs in a more humane and dignified way while learning about their rights and gaining valuable leadership skills. The Annenberg School for Communication (the research partner) and IDEPSCA (the community partner) came together around the shared goal of designing communication systems and processes that promote media justice and help those without computer access gain greater participation in the digital public sphere. This chapter is a reflection on popular communication, participatory design, andcommunity-based multimedia practice from the Mobile Voices project team. It was collaboratively written by 13 members of the project and includes a project overview and an exploration of themes including the pedagogy of popular communication, participatory technology design, and the dynamic

Tribological Performance of Advanced Polymeric Coatings Under Extreme Operating Conditions

Polymers and their composites have favorable tribological performance such as low coefficient of friction (COF) and good corrosion resistance, when working as bearing materials. The present work is studying the tribological performance of thin (~ 10s of microns) high-bearing polymeric coatings under extreme working conditions, including high temperature, cryogenic temperature, high contact pressure, high chamber pressure, starved lubrication, and abrasive wear. This work is an important contribution in proving the concept of application of thin polymeric coatings in environments such as dry sliding bearing, valve sealing surfaces, hydrodynamic bearings and drilling application under different extreme working conditions. Three groups of polymers, namely Polytetrafluoroethylene (PTFE)-based, Polyether ether ketone (PEEK)-based, and Aromatic Thermosetting coPolyesters(ATSP)-based coatings were extensively studied. Out of the three groups of polymers, ATSP-based coating showed the most desirable tribological performance: ‘zero wear’ at different temperature from -160°C to 260°C with dry sliding, extremely low wear coefficient (4.15×10⁻⁸ mm³/Nm) under starved lubrication condition, stable coefficient of friction (COF) and low wear rate under sand abrasive condition, and extreme low COF for oil and gas drilling application. Traditionally, the friction force between two solids is attributed to adhesion and deformation effects; where the adhesion force involves the shearing between the real contact surfaces and deformation is due to the hard material‘s asperities plowing on the softer material. This work proposes a phenomenological model of friction for viscoelastic materials by using the viscosity and elasticity parameters acquired by nano-indentation measurements at elevated temperatures. Substituting the viscosity and elastic modulus terms, the model showed reasonable COF for the coatings up to temperatures that were lower than the glass transition temperature

Aprende, crea y escribe con el clan 3 una propuesta metodológica para mejorar la producción textual en los estudiantes de grado décimo jornada nocturna del colegio Miguel Antonio Caro

El presente proyecto tiene como propósito fortalecer las habilidades escriturales relacionadas con la producción textual de los estudiantes de décimo grado jornada nocturna del Colegio Miguel Antonio Caro; el estudio está fundamentado en la observación previa donde se evidenciaron sus falencias y destrezas, posteriormente se realizó la aplicación de pruebas diagnósticas que determinaron exactamente en donde incidían las fallas del proceso escritor, y a partir de las cuales, se implementaron y diseñaron estrategias metodológicas para el mejoramiento de la escritura de los estudiantes; una de ellas permitió la interacción con el campo tecnológico, pues se tuvo en cuenta la utilización de una herramienta virtual dentro del proceso de refuerzo y afianzamiento junto con otras actividades desarrolladas. Finalmente se realizó la evaluación de la propuesta metodológica, logrando identificar el avance en la producción escrita, de esta manera la investigación utilizada fue de carácter cualitativo y cuantitativo, así como el análisis e interpretación de la información. Los resultados obtenidos fueron satisfactorios debido a que durante la primera etapa del desarrollo de la investigación sólo el 25% de los estudiantes lograban la redacción de un texto coherente, mientras que al finalizar un 75% logró mejorar la producción escrita. En conclusión el resultado permitió conocer que las estrategias implementadas fueron las adecuadas para dar cuenta de los objetivos propuestos.This project aims to strengthen the scriptural textual skills related to production of sophomores night work of Miguel Antonio Caro College; The study is based on previous observation where their weaknesses and skills were evident, then the application of diagnostic tests that determined exactly where impinged failures writing process, and from which were implemented and designed methodological strategies performed improving students' writing; one of them allowed interaction with the technological field, because it took into account the use of a virtual tool in the process of strengthening and consolidation with other activities undertaken. Finally, the assessment of the methodological proposal was made, and succeeded in identifying progress in the written production, so research was used qualitative and quantitative, as well as analysis and interpretation of information. The results obtained were satisfactory because during the first stage of development of research only 25% of students succeeded in writing a coherent text, while 75% at the end managed to improve written production. In conclusion the result envisioned that the strategies implemented were adequate to account for the proposed objectives

Therapeutically engineered induced neural stem cells are tumour-homing and inhibit progression of glioblastoma

Transdifferentiation (TD) is a recent advancement in somatic cell reprogramming. The direct conversion of TD eliminates the pluripotent intermediate state to create cells that are ideal for personalized cell therapy. Here we provide evidence that TD-derived induced neural stem cells (iNSCs) are an efficacious therapeutic strategy for brain cancer. We find that iNSCs genetically engineered with optical reporters and tumouricidal gene products retain the capacity to differentiate and induced apoptosis in co-cultured human glioblastoma cells. Time-lapse imaging shows that iNSCs are tumouritropic, homing rapidly to co-cultured glioblastoma cells and migrating extensively to distant tumour foci in the murine brain. Multimodality imaging reveals that iNSC delivery of the anticancer molecule TRAIL decreases the growth of established solid and diffuse patient-derived orthotopic glioblastoma xenografts 230- and 20-fold, respectively, while significantly prolonging the median mouse survival. These findings establish a strategy for creating autologous cell-based therapies to treat patients with aggressive forms of brain cancer

Revealing the Nature of Defects in α-Ag2WO4 by Positron Annihilation Lifetime Spectroscopy: A Joint Experimental and Theoretical Study

Electron–matter coupling is a fascinating way to tune and modify the properties of materials. In this work, we present a study on the formation and nature of vacancy-like defects in α-Ag2WO4 samples synthesized in a water or ethanol medium and subsequently submitted to electron beam irradiation at different exposure times. To understand the effects on the geometrical and electronic nature of the generated defects, the data obtained by positron annihilation lifetime spectroscopy were interpreted with the aid of first-principles calculations at the density functional theory level. To complement these results, X-ray diffraction, Raman spectroscopy, photoluminescence emissions, and field emission gun scanning electron microscopy techniques were also used. Based on the positron binding energy and the calculated and experimental positron lifetimes, the defect structure of the nonirradiated and irradiated samples was revealed. As a general feature, it was found that the defect structure is more complex for samples synthesized in ethanol than in water. In particular, the results show that all samples contain defects involving Ag vacancies and that the concentration of this type of defect increases with the irradiation time.This work was partly funded by the Fundação de Amparo à Pesquisa do Estado de São Paulo—FAPESP (grants nos. 2013/07296-2 and 2019/01732-1), the Financiadora de Estudos e Projetos—FINEP, Conselho Nacional de Desenvolvimento Cientifico e Tecnológico—CNPq (grants nos. 166281/2017-4 and 426634/2018-7), and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior CAPES. J.A. acknowledges Universitat Jaume I (project UJI-B2019-30) and the Ministerio de Ciencia, Innovacio′n y Universidades (Spain) (project PGC2018094417-B-I00) for financially supporting this research. C.M. and A.S. thank the funding from the Agencia Nacional de Promoción Científica y Tecnológica—ANPCyT (Argentina) (PICT 2015-1832), the Comisión de Investigaciones Científicas de la Provincia de Buenos Aires—CICPBA (Argentina), and the Secretaría de Ciencia, Arte y Tecnología, UNCPBA (Argentina)

Plan estratégico de la televisión en el Perú

El desarrollo de este estudio presenta como objetivo analizar el impacto que producen, en la economía, tanto la televisión de señal abierta como la de señal cerrada en el Perú. Históricamente, en los últimos años, la televisión peruana se ha consolidado como uno de los medios de comunicación más importantes y el que ejerce mayor influencia en el público nacional. Asimismo, la incorporación de la televisión cerrada ha incrementado la variedad de programas que se ofertan en el mercado. El alcance del estudio radica en analizar la televisión de señal abierta, cerrada y comunitaria abarcando un nivel de análisis de la televisión que llega a nivel nacional. La televisión llegó al Perú en 1958, es decir, 20 años después de la primera emisión televisiva en los Estados Unidos de Norteamérica. Por otro lado, en la década de los cincuenta, este medio estuvo inmerso en diversas circunstancias coyunturales que afectaron su funcionamiento. En la actualidad, la televisión se encuentra en un proceso de cambio, debido a las nuevas disposiciones legales, emitidas recientemente por el gobierno peruano, las cuales buscan mejorar el ejercicio de este medio de gran impacto. El presente trabajo propone el desarrollo del Plan Estratégico de la Televisión en el Perú, el cual se sostiene en los lineamientos definidos por el profesor Fernando D’Alessio Ipinza, director general de CENTRUM Católica. Como resultado de un seguimiento estricto de esta metodología, se determinó que el trabajo coordinado y sinérgico entre todos los integrantes de la cadena de valor pertenecientes a este sector configura el principal factor crítico de éxito para impulsar el subsector de la televisión en el Perú. Asimismo, en esta investigación, se plantea un conjunto de estrategias y objetivos de corto y largo plazo, entre muchas otras definiciones, las cuales se hallan fuertemente relacionadas y persiguen el mismo fin: alcanzar la misión y visión propuestas para la industria de la televisión en el Perú.The development of this study is to analyze the impact on the economy of both the broadcast television signal as closed in Peru. Historically, in recent years, Peruvian television has consolidated as one of the most important media and influential in the Peruvian public, thus incorporating the closed television has increased the variety of programs offered in the market. Television arrived in Peru in 1958, 20 years after the first television broadcast in the United States of America. He has been involved in various conjunctural circumstances that, one way or another, affected its operation. Today television is in a process of change due to new laws recently issued by the Peruvian government, seeking to improve the performance of this medium impact. This paper develops a strategic plan budget Television in Peru, based on the guidelines defined by Professor Fernando D’Alessio Ipinza, Director General of CENTRUM Catholic. And as a result of strict adherence to this methodology is that it is identified as a major critical success factor to drive the sub-sector TV Peru, coordinated and synergies between all members of the value chain in this sector. It also raises a set of strategies, short-term objectives and long term, among other definitions, all closely related to each other and with the same goal: to achieve the mission and vision for the sub-sector proposals Television in Peru.Tesi

DESENVOLVIMENTO E AVALIAÇÃO DE PROBIÓTICOS AUTÓCTONE E ALÓCTONE PARA CAMARÃO DA MALÁSIA

Este trabalho teve como objetivo avaliar a microbiologia intestinal de camarõesalimentados com bactérias autóctones e alóctones de Camarão da Malásia( Macrobrachium rosenbergii ). O trabalho foi dividido em três etapas: 1º) isolamentode bactérias ácido láticas; 2º) seleção in vitro ; e 3º) teste in vivo . A cepa isoladaC211 apresentou a melhor inibição média (0,98 ± 0,26cm), menor resistência aantibióticos (1,51 ± 0,70cm). Após 30 dias do ensaio in vivo , os camarões alimentados com as bactérias ácidos-láticas apresentaram maior contagem deste grupo o trato intestinal dos camarões (6,54 ± 0,25 UFC) em relação ao controle (5,17 ± 0,70 UFC)