580 research outputs found

    Foreword

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    Imagine a hypothetical disaster befalling America\u27s cities. A bomb, perhaps; or a ferocious hurricane; or an earthquake. Two to 3 million Americans lose their homes. We know that, daily, the evening news and the major newspapers would feature stories on the number of people victimized by the disaster. Many Americans would volunteer to help their neighbors in need, and many community agencies and local governments would come to the rescue, but the public would rightly expect the federal government to play a leading role in repairing the human and physical damage. The president and Congress would act swiftly to declare a national emergency and to funnel relief into the cities. In fact, a national disaster is occurring in America now, and what is especially horrifying is that few of our nationally elected leaders are even addressing the crisis, let alone proposing serious solutions. By some accounts, 2 to 3 million Americans are homeless. Although some dispute this figure, the fact remains that the number of homeless Americans is growing

    A Quarter-Century of Normalization and Social Role Valorization

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    During the late 1960s, Normalization and Social Role Valorization (SRV) enabled the widespread emergence of community residential options and then provided the philosophical climate within which educational integration, supported employment, and community participation were able to take firm root. This book is unique in tracing the evolution and impact of Normalization and SRV over the last quarter-century, with many of the chapter authors personally involved in a still-evolving international movement

    Use of particulate surrogates for assessing microbial mobility in subsurface ecosystems

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    Mass fluxes from the ground surface can play a vital role in influencing groundwater ecosystems. Rates of delivery may influence intact ecosystem composition, while fluxes of substances associated with anthropogenic activity may critically alter the functioning of associated microbial assemblages. Field-based tracing experiments offer a valuable means of understanding mass transport rates and mechanisms, particularly in complex heterogeneous epikarst systems overlying vulnerable fissured aquifers. A short-term tracer experiment monitoring solute and particle tracer concentrations after they passed through a 10-m-thick sequence of limestone, capped by a thin soil, revealed rapid travel times and variable attenuation rates for the substances employed. Results demonstrated that particle tracers have shorter average travel times and can reach the subsurface in higher concentrations and over shorter times than non-reactive solutes. High recovery rates for the bacterial tracer Ralstonia eutropha H16 contrasted strongly with those of similarly sized fluorescent polystyrene microspheres, highlighting the importance of physico-chemical surface characteristics of particle tracers. Complementary laboratory batch experiments examined the role played by organic and inorganic soil/rock surfaces on particle tracer attenuation. Findings suggest that biofilms may significantly promote transport of particulate material below ground, i.e., the delivery of allochthonous microorganisms to karst groundwate

    A Quarter-Century of Normalization and Social Role Valorization

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    During the late 1960s, Normalization and Social Role Valorization (SRV) enabled the widespread emergence of community residential options and then provided the philosophical climate within which educational integration, supported employment, and community participation were able to take firm root. This book is unique in tracing the evolution and impact of Normalization and SRV over the last quarter-century, with many of the chapter authors personally involved in a still-evolving international movement

    Investigation of virus attenuation mechanisms in a fluvioglacial sand using column experiments

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    Virus inactivation and virus adsorption, resulting from interactions with minerals, constitute important aspects of an aquifers disinfection capacity. Investigations using a 20 cm column filled with medium-grained natural sands demonstrated that the sands can attenuate up to 62% of a pulse of viruses injected. Experiments using repeatedly washed sands had significantly lower attenuation capacity than fresh sands, due to removal of fine-grained (silt and clay-sized) coatings on grain surfaces. X-ray diffraction analyses of the sand, and the associated fine-grained coating indicated that no significant mineralogical differences existed between these two materials. The experimental data suggested that rougher surfaces/crystal edges in the grain coatings reduced repulsive forces between viruses and the sands permitting greater virus adsorption to the column matrix. Soaking all sands with Tryptone solution after testing released adsorbed viruses indicated that short-term viral inactivation due to interactions with the column matrix was a negligible part of the attenuation proces

    Salary status of public secondary school couselors in Kansas for the year 1960-1961

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    Includes sample forms in pocket

    Identification of zones of preferential groundwater tracer transport using a mobile downhole fluorometer

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    A mobile downhole fluorometer was used to detect zones of preferential groundwater tracer transport into an observation well. Identification of such zones is not possible if individual samples are collected over the well's entire screened interval. Laboratory-based tests using the fluorometer, and a purpose-built apparatus demonstrated that the fluorometer could be used with tracers to characterise well water flow regimes. During field investigations in a porous aquifer, the fluorometer monitored tracer concentrations in an observation well with a 12-m-long screen, 10m down the hydraulic gradient from a fully penetrating injection well. Test results showed that the tracer occurred in the observation well over a discrete 2.5-m-thick interval. Single-well dilution test and vertical-flow data indicated that water entered the well at additional depths, but no tracer was detected at these levels. A numerical model reproducing dilution test concentration profiles indicated that water entered the well in many of these horizons at comparable velocities to those in the tracer-bearing zone. These data suggest that groundwater flow direction varied with depth in the aquifer under investigation. Moreover, simulations of tracer arrival indicated that the tracer distribution observed in the observation well was derived from a horizon that may be no thicker than 0.5

    Boston in Transition: A Financial Analysis

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    The new Mayor of Boston must earn the confidence of the taxpaying public in his financial leadership by employing credibility and candor in the management of city affairs. To begin the process of re-enfranchising Bostonians who have come to mistrust financial decisions seemingly determined by political calculations, the new Mayor must make an accurate disclosure of the City\u27s financial picture, rely on the commitment of the state to properly support its capital city and restore integrity and strong management controls to government operations. Recommendations for budget cuts, hiring freezes and adjustments in tax rates, when they are necessary, should only be made when accurate information and open debate so dictate. The Financial Analysis Research Group for the mayoral transition was assembled to provide an assessment of the City\u27s financial posture as of January, 1984; to evaluate the financial management aspects of agency operations; to determine the effectiveness of existing budgetary planning systems; and to provide the new Mayor with a pragmatic financial management plan to support his policies and philosophy

    Next Generation Life Support Project Status

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    Next Generation Life Support (NGLS) is one of several technology development projects sponsored by NASA s Game Changing Development Program. The NGLS Project is developing life support technologies (including water recovery and space suit life support technologies) needed for humans to live and work productively in space. NGLS has three project tasks: Variable Oxygen Regulator (VOR), Rapid Cycle Amine (RCA) swing bed, and Alternative Water Processor (AWP). The RCA swing bed and VOR tasks are directed at key technology needs for the Portable Life Support System (PLSS) for an Advanced Extravehicular Mobility Unit, with focus on test article development and integrated testing in an Advanced PLSS in cooperation with the Advanced Extra Vehicular Activity (EVA) Project. An RCA swing-bed provides integrated carbon dioxide removal and humidity control that can be regenerated in real time during an EVA. The VOR technology will significantly increase the number of pressure settings available to the space suit. Current space suit pressure regulators are limited to only two settings whereas the adjustability of the advanced regulator will be nearly continuous. The AWP effort, based on natural biological processes and membrane-based secondary treatment, will result in the development of a system capable of recycling wastewater from sources expected in future exploration missions, including hygiene and laundry water. This paper will provide a status of technology development activities and future plans
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