Worldwide Workshop on Youth Involvement as a Strategy for Social, Economic and Democratic Development

Summarizes January 2000 discussions on building capacity in the field of youth service. Explores connections with social capital, economic productivity, adolescent development, marginalized youth, civic engagement, and policy. Includes country summaries

An Analysis of Driver Reactions to Tire Failures Simulated with the National Advanced Driving Simulator (NADS)

Analyses of real-world tire tread belt detachment and/or sudden air loss events as well as vehicle testing of those events have been presented in scientific literature since the 1990’s. These confirm that such tire failures are complex and semi-random events that produce numerous sensory feedback cues to real-world drivers. These analyses further demonstrate that vehicles representing a full spectrum of steering characteristics are typically controllable and are controlled by drivers both during and after the tire disablement event. In 2003, the National Highway Traffic Administration (NHTSA) sponsored a study using the National Advanced Driving Simulator (NADS) to evaluate the technical hypothesis that there is a correlation between vehicle linear range understeer gradient and the likelihood of control loss when subject drivers experience a simulated tread belt detachment. The NADS subjects “drove” three simulated “vehicles” with different understeer gradients in a simulated tread separation even. The study’s authors reached conclusions regarding the drivers’ ability to control the “vehicles” which were inconsistent with real-world research. This paper presents an analysis of the NADS study performed to identify possible causes of the conflicting results and provides commentary upon several deficiencies noted in the NADS vehicle/tire modeling and validation. A more comprehensive understanding of the reported driver reactions when viewed in light of real vehicle experiments, real-world data, and an understanding of the limitations of the simulations is provided

Changes in tolerance to herbicide toxicity throughout development stages of phototrophic biofilms

Ecotoxicological experiments have been performed in laboratory-scale microcosms to investigate thesensitivity of phototrophic biofilm communities to the alachlor herbicide, in relation to the stages ofphototrophic biofilm maturation (age of the phototrophic biofilms) and physical structure (intact biofilmversus recolonization). The phototrophic biofilms were initially cultivated on artificial supports in aprototype rotating annular bioreactor (RAB) with Taylor–Couette type flow under constant operatingconditions. Biofilms were collected after 1.6 and 4.4 weeks of culture providing biofilms with differentmaturation levels, and then exposed to nominal initial alachlor concentration of 10 ug L−1in either intactor recolonized biofilms for 15 days in microcosms (mean time-weighted average concentration – TWACof 5.52 ± 0.74 ug L−1).At the end of the exposure period, alachlor effects were monitored by a combination of biomass descrip-tors (ash-free dry mass – AFDM, chlorophyll a), structural molecular fingerprinting (T-RFLP), carbonutilization spectra (Biolog) and diatom species composition. We found significant effects that in terms ofAFDM, alachlor inhibited growth of the intact phototrophic biofilms. No effect of alachlor was observedon diatom composition or functional and structural properties of the bacterial community regardless ofwhether they were intact or recolonized. The intact three-dimensional structure of the biofilm did notappear to confer protection from the effects of alachlor. Bacterial community structure and biomass levelof 4.4 weeks – intact phototrophic biofilms were significantly influenced by the biofilm maturation pro-cesses rather than alachlor exposure. The diatom communities which were largely composed of mobileand colonizer life-form populations were not affected by alachlor.This study showed that the effect of alachlor (at initial concentration of 10 ug L−1or mean TWAC of5.52 ± 0.74 ug L−1) is mainly limited to biomass reduction without apparent changes in the ecologicalsuccession trajectories of bacterial and diatom communities and suggested that carbon utilization spec-tra of the biofilm are not damaged resulting. These results confirmed the importance of consideringthe influence of maturation processes or community age when investigating herbicide effects. This isparticularly important with regard to the use of phototrophic biofilms as bio-indicators

Knoxville Gang Update. Class of 2016.

This technical report is based on the work of students who took Dr. Durán’s spring semester of 2016 gang course. This is the first and only participatory action research project conducted in Knoxville, Tennessee. Students focused on several themes including history of gangs in Knoxville, patterns of race, ethnicity, gender, and age, and responses to street gangs. Although Durán’s time in Knoxville was short (4 years), there is much more work to be done in the South and Appalachia region. The student responses were edited by Durán, Campos, and Nelson

A photosynthetic rotating annular bioreactor (Taylor–Couette type flow) for phototrophic biofilm cultures

In their natural environment, the structure and functioning of microbial communities from river phototrophic biofilms are driven by biotic and abiotic factors. An understanding of the mechanisms that mediate the community structure, its dynamics and the biological succession processes during phototrophic biofilm development can be gained using laboratory-scale systems operating with controlled parameters. For this purpose, we present the design and description of a new prototype of a rotating annular bioreactor (RAB) (TayloreCouette type flow, liquid working volume of 5.04 L) specifically adapted for the cultivation and investigation of phototrophic biofilms. The innovation lies in the presence of a modular source of light inside of the system, with the biofilm colonization and development taking place on the stationary outer cylinder (onto 32 removable polyethylene plates). The biofilm cultures were investigated under controlled turbulent flowing conditions and nutrients were provided using a synthetic medium (tap water supplemented with nitrate, phosphate and silica) to favour the biofilm growth. The hydrodynamic features of the water flow were characterized using a tracer method, showing behaviour corresponding to a completely mixed reactor. Shear stress forces on the surface of plates were also quantified by computer simulations and correlated with the rotational speed of the inner cylinder. Two phototrophic biofilm development experiments were performed for periods of 6.7 and 7 weeks with different inoculation procedures and illumination intensities. For both experiments, biofilm biomasses exhibited linear growth kinetics and produced 4.2 and 2.4 mg cm-2 of ash-free dry matter. Algal and bacterial community structures were assessed by microscopy and T-RFLP, respectively, and the two experiments were different but revealed similar temporal dynamics. Our study confirmed the performance and multipurpose nature of such an innovative photosynthetic bioreactor for phototrophic biofilm investigations

Morbidade psiquiátrica em crianças com alterações neurológicas

Universidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Departamento de PsiquiatriaInstitute of Psychiatry at the Maudsley Child and Adolescent Psychiatry DepartmentUNIFESP, EPM, Depto. de PsiquiatriaSciEL

Opportunities and Best Practices to Support Sustainable Production for Small Growers and Post-Harvest Processors in Southern California

This article describes current practices and needs associated with water and gas conservation among Southern California greenhouse growers, Post-Harvest Processors (PHPs), and agricultural associations. Two communication forums were held with the goal of educating the local gas company and small growers and PHPs on the most compelling needs and best practices to support sustainability while improving profit. While some growers and PHPs have made significant investment in energy and water conservation advanced technologies, all participants expressed the desire to work with local utilities towards greater water and energy conservation opportunities that are customized to specific needs

Pinta Fearz: A Chicano Sociologist's Life on the Edge of the Law

Previous version on Bad Subjects website which is no longer available.The jura's EyeZ are on me and in esta vida there ain't no gold at the other side of the rainbow. Suddenly, my tires pop and someone reaches from behind and forces me to the ground. Lying face first in the dirt the handcuffs are tightened as I feel a gun pressed against the back of my head

Improvement of Flow Uniformity and Modeling of Filtration Efficiencies for Automotive Air Filter Test Housings

Mechanical Engineerin

Estudi comparatiu de tipologies d'urbanització aplicables a creixements urbans dispersos ("urbanitzacions")

Fins a mitjans dels anys 80 va proliferar a Catalunya gran nombre d'urbanitzacions disperses, sense cap fonament planificador. Emmarcada en el seu procés de condicionament, aquesta tesina presenta un estat de la questió de les eines d'urbanització aplicables; planteja una metodologia per valorar-ne els costos de la construcció, els de manteniment i la sostenibilitat; i, a partir de l'optimització d'aquests costos, proposa un catàleg de seccions de vial aplicables en urbanitzacions disperses