57 research outputs found
Time and Efficacy: Neighborhoods, Temporal Constraints, and the Persistence of Poverty
No full textThis dissertation examines the hidden ways in which individual poverty and neighborhood constraints intersect to deplete the most valuable of resources—time. Sociological theory from Durkheim to Bourdieu clearly articulates that while clock time may march on in relatively homogenous units, in reality time unfolds with varying speeds and rhythms for different people. That is, how people allocate, experience, and make judgments about time is a reflection of their social context, accumulated lived experiences and individual social location. Yet, even given this theoretical understanding, time remains critically understudied in research on inequality. Based on two years of fieldwork in Philadelphia and analyses of nationally representative time diary data, I demonstrate the manifold ways in which material deprivation creates constraints that make it challenging for people to convert time into activities that promote mobility and wellbeing. At the same time, I will argue that time is not just a resource that is unevenly distributed across groups; it is also an experience that is situated in place and space. I show that neighborhood conditions matter for exposing residents to temporal uncertainty and constant waiting, and ultimately contribute to the reproduction of poverty
Architectural Components to Contribute to Social Interaction
No full textThe amount of people with feelings of loneliness has increased dramatically in recent years. Loneliness is an undesirable and horrible situation where one can feel completely abandoned. Solo dwellers and elderly are found to be the most vulnerable.Besides the devastating personal situation of people with feelings of loneliness, consequences of this problem also touches society.The main question of this research comprises the issue what architectural requirements a residential building should meet, in order to create a living environment that is designed to contribute to interaction between solo dwellers of different generations.From the problem statement, the target group emerged: single and isolated elderly and young adult and adult solo dwellers. The needs of this target group are examined into detail.The research thoughtfully examines how to stimulate interaction among this intended target group. This is considered on the level of spatial design as well as a psychological approach.In order to achieve a complete and accurate analysis, multiple theories and ideas from researchers, scientists, sociologists, and architects are consulted.In addition, existing projects and buildings were selected to obtain knowledge from existing buildings projects. During the research process, these contributed to gain information about the research subject as well as visualizing the knowledge gained from the literature and existing studies.Additionally, one of the selected building projects has been visited to conduct fieldwork research. This in order to experience the building physically and obtain first-hand experiences, views and opinions from residents.The study revealed that concerning social interaction, several factors are involved.BleijburchtAdvanced Dwelling: Ecology of InclusionArchitecture, Urbanism and Building Sciences | Advanced Housing Desig
Register of Persons Committed to the City Prison 1887-1890
No full textFort Worth Police Department Collection 1873-1912
Fort Register of Persons Committed to the City Prison 1887-1890
City of Fort Worth Police Department
Fort Worth City Prison; Crime and criminals; Law enforcement
Alice Smith: Drunk
Calvin McConal: Cursing and swearing
Ada Robenson: Vangrancy
George Fuller: Vagrancy
Sam Fassett: Vangrancy
Francis Linsey: Disturbing the peace
Sam Hardy: Drunk
Jim Davis: Drunk
Peter Wilson: Drunk
Ada Robisan: Abusive language
Jerry Edwards: Fighting
Dave Clark: Drunk
Sam Evans: An assult
Charles Lawrey: Drunk
Dave Kelley: Drunk
Sam Evans: Drunk
George Lang: Drunk
Total for January: $50.6
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Dual Enrollment for High School Students
No full textDual enrollment programs allow high school students to enroll in college courses and potentially earn college credit. This guide, created in partnership with the Career Academy Support Network at the University of California, Berkeley, provides practitioners, schools, and districts with a road map for incorporating college coursework into high school academies and pathways.
Included in this how-to guide is a list of steps, considerations, and resources, with examples from the Concurrent Courses Initiative—a study of eight dual enrollment programs in California
Impact of Polymeric Plumbing Materials on Drinking Water Quality and Aesthetics
No full textThe use of polymer pipes is now very common in home plumbing and other parts of the drinking water distribution system. Many taste and odor complaints in drinking water are known to originate from contact of water with materials. The ability of polymer pipes used in home plumbing to affect drinking water quality and aesthetics was investigated using the Utility Quick Test (UQT). Analysis of water quality and aesthetics were conducted in the absence of disinfectant and the presence of either chlorine or chloramines. A Flavor Profile Analysis (FPA) panel was trained according to Standard Methods 2170B to evaluate the organoleptic characteristics of the samples. Laboratory analyses were performed to determine levels of total organic carbon (TOC), disinfectant residual, pH and to attempt to identify specific volatile organics.
The first part of this study investigated HDPE, cPVC and epoxy lined copper pipes using the UQT method. Both HDPE and epoxy-lined copper had significant effects on water quality and aesthetics during the approximately 10 day exposure of the UQT. HDPE and epoxy-lined copper leached significant amounts of TOC and consumed more disinfectant than controls, but in different amounts. cPVC was the most inert of the materials tested and had the least impact on water quality and did not contribute any significant odor. None of the pipes tested appeared to contribute trihalomethanes to drinking water, but further analysis revealed that the compounds may actually be generated and subsequently sorbed into pipe walls. These data show the effects of newly installed polymeric pipe materials and their potential to impact water quality in differing capacities.
The second part of this study compared the results of the UQT on HDPE, epoxy lined copper, cPVC, PEX-a and PEX-b with the goal of comparing and contrasting how five different polymeric plumbing materials can impact drinking water quality. Results demonstrated the short-term ability of all pipe materials except cPVC to impact water quality and aesthetics. This data could potentially be useful in generating selection criteria for homeowners and plumbing professionals regarding the impact of newly installed plumbing materials.Master of Scienc
Determination of the Influence of Polyurethane Lining on Potable Water Quality
No full textThe corrosion of the drinking water distribution system is a serious problem in the United States. The annual cost to repair damages related to corrosion for public utilities in the United States are estimated at $22 billion. Polyurethane can be used as an in situ pipe liner which reduces the overall cost to rehabilitate water mains. Polyurethane is gaining popularity as a drinking water pipe liner. Not much is known about the effects of polyurethane to reline potable pipes. Polyurethane has only recently begun to be approved by the U.S. Environmental Protection Agency for use in drinking water piping, although it has been used in the United Kingdom since 1999.
The American National Standards Institute/National Sanitation Foundation 61 Drinking Water System Components â Health Effects (ANSI/NSF 61) for pipe and pipe liners was used to investigate changes in water quality in contact with polyurethane lining material. In addition, the exposure time was extended to 30 days and odor analysis was performed. Polyurethane coupons were placed in headspace free borosilicate glass vessels with a surface area to volume ratio of 0.39. The water was pH 8 and comprised of salts: MgSO₄, NaHCO₃, CaSO₄, CaC1₂, Na₂SiO₃ and KNO₃ in a ratio typical of standard drinking water. Three types of disinfectant were used: no disinfectant, chlorine and monochloramine. The water was removed, sampled and replaced on days 1, 2, 4, 9, 11, 14, 15, 19, 21 and 30. The sample water was tested for pH, temperature, total organic carbon concentration (TOC), disinfectant residual, ammonia concentration as N-NH₃, hardness as combined Ca and Mg concentrations, alkalinity and temperature on days when the sample water was changed. Total solids (TS), odor, trihalomethanes (THMs), haloacetic acids (HAAs), and semivolatile organic carbons (SVOCs) were tested on days 1, 4, 9, and 14.
The polyurethane lining had major impacts on pH, odor and haloacetic acids throughout the 30 day experiment. A 2-3 pH unit decrease to pH 6 was constant for all conditions tested. Odor panelists described the odor for both chlorinated and monochloraminated waters as "chlorinous" and either pleasant as "sweet chemical" or putrid as "locker room" . Haloacetic acids were formed and increased in concentration (by approximately 30 µg/L, which is half the US EPA regulated value of 60 µg/L). Trihalomethane formation was not seen. Total organic carbon leached from the polyurethane liners reached 0.65 mg/L above background on day 1 but by day 15 was only >0.1 mg/L above background. Chlorine and monochloramine were consumed by the polyurethane and increased exposure time leads to decreased disinfectant residual.
It is important for water utilities to know how a lining material will affect the water quality. It has been shown that other polymeric lining materials have impacted the disinfection by-products as well as producing odor. Water treatment facilities are responsible for the water quality throughout the infrastructure and with Environmental Protection Agency regulations becoming stricter they cannot afford to not know the impact of polymeric lining materials in their system.Master of Scienc
Legionella pneumophila in Domestic Hot Water Systems: Evaluation of Detection Methods and Environmental Factors Affecting Survival
No full textLegionella is the causative agent of Legionnaires' disease which hospitalizes 8,000 to 18,000 people in the United States each year. The disease in transmitted through inhalation or aspiration of water containing the bacterium and can be acquired within the home. Studies have found that 0-37% of domestic water heaters contain Legionella, making household hot water systems a potential route of exposure.
The objective of this research was to evaluate different methods for testing environmental samples for Legionella pneumophila and to analyze potable water conditions that affect survival of free living Legionella pneumophila in hot water tanks. Three heat pretreatment methods (50ºC for 30 minutes, 55ºC for 15 minutes, and 60ºC for 3 minutes) were not effective at recovering Legionella in this study. There was no statistically significant difference between the three acid pretreatment methods that were tested (pH 2.0 with a neutralizing solution, pH 2.2, and the CDC method). Six media (BCYE, DGVP, PCV, GPCV, CCVC, and GPVA) exhibited similar Legionella recovery, except for when high levels of non-Legionella organisms were present, in which case BCYE demonstrated lower recovery. When disinfectant was present, if sodium thiosulfate was not added before the disinfectant, Legionella recovery was lower. However, this result was not statistically significant for free chlorine until after 5 minutes. Pseudomonas aeruginosa (up to 67.5 cfu/ml) and pyocyanin (up to 9 mg/l) did not have an effect on Legionella recovery under the tested conditions.
Environmental factors affecting survival of free living Legionella pneumophila in hot water tanks were also studied. After one day exposure in small-scale simulated water heaters at 55ºC, viable Legionella could not be recovered. At 44ºC, Legionellae were recovered after one day but only at very low levels after eight days. Between 23 and 37ºC, Legionella could survive longer than eight days. Copper (Cu²⁺) concentrations above 2160 ppb were found to be toxic to Legionella, but iron (Fe³⁺) between 1 and 2160 ppb did not affect survival. Above pH 11 survival was greatly reduced. No effect was observed between pH 5-10. When glass fiber filters were added to the reactors and they were seeded with tap water and sediment slurry, Legionellae were retained in 7 of 16 reactors for 327 days.
The results of this work will assist in optimal identification of Legionella via microbial analysis of potable water samples, thereby assisting in prevention and diagnosis of factors contributing to Legionnaires' disease, especially in settings with high-risk patients (e.g. hospitals). Water systems studying Legionella amplification in domestic hot water systems can use simulated or real distribution system sampling to reproduce and study factors that prevent or reduce Legionella growth and persistence.Master of Scienc
Microbial Ecology of Acanthamoeba polyphaga and Sulfate-Reducing Bacteria in Premise Plumbing
No full textGreat advances have been made in the last 100 years in the effort to provide safe and reliable potable water. Unfortunately, organisms surviving the water treatment process still cause illnesses in the population. Acanthamoebae are ubiquitous in the environment and are resistant to commonly used disinfection methods. In addition to being pathogenic on their own, Acanthamoeba spp. are capable of acting as a host to pathogenic bacteria in potable water. The amoebae provide the bacteria with protection from chemical and physical means of disinfection. In this way many pathogens that would otherwise be killed in the water treatment process survive and are capable of infecting water customers.
Most likely due to experimental limitations discussed herein, the concentration of organic carbon in solution was not found to affect the number of Acanthamoeba polyphaga surviving within reactors designed to model residential water tanks. A copper ion concentration of 1.3 mg/L was determined to be an effective disinfectant against A. polyphaga trophozoites, while free chlorine at 10 mg/L and monochloramine at 50 mg/L were deemed effective against trophozoites.
Sulfate-reducing bacteria (SRB) are suspected to be causative agents in copper pitting corrosion. SRB have been found in tubercles covering pits in many homes experiencing pinhole leaks, but the mechanisms of the survival of these organisms in potable water systems are poorly understood. Nutrient studies conducted show that the absence of nitrogen in solution may encourage copper corrosion by SRB. In addition, a medium specifically designed to encourage SRB growth resulted in a large increase in copper corrosion as compared to the control water.Master of Scienc
Dezincification and Brass Lead Leaching in Premise Plumbing Systems: Effects of Alloy, Physical Conditions and Water Chemistry
No full textBrass components are widely used in drinking water distribution systems as valves, faucets and other fixtures. They can be corroded by "dezincification," which is the selective leaching of zinc from the alloy. Dezincification in potable water systems has important practical consequences that include clogged water lines, premature system failure and leaks, and release of contaminants such as lead. Brass failures attributed to dezincification are known to occur at least occasionally all over the world, and have emerged as a significant problem in the U.S. recently due to the use of inexpensive high zinc brass fittings in cross-linked polyethylene (PEX) plumbing systems. As PEX systems gain popularity and leaded brass is recognized as an important source of lead in potable water systems, it is important to examine dezincification corrosion in more detail.
An in-depth literature review revealed that conventional wisdom about dezincification was no longer adequate in explaining failures observed in modern water systems. Little research has been conducted since the landmark work of Turner et al. nearly half a century ago. The potential role of chloramines, phosphate inhibitors, and modern understanding of water chemistry need evaluation. The role of physical factors including stirring, heating and galvanic connections are also potentially influential.
A mechanistic study of zinc solubility and corrosion of copper: zinc couples provided insight to factors that might mitigate and exacerbate zinc leaching from brass. Zinc solubility and corrosion was reduced by higher pH and bicarbonate, but was enhanced by higher chloride. Hardness ions including Mg⁺² and Ca⁺² had little effect.
Alloys with higher zinc content had a greater propensity for dezincification corrosion. Stirring and galvanic connections caused brass to leach more metals and have higher weight loss. Heating may contribute to corrosion scale accumulation.
A comprehensive examination of dezincification as a function of water chemistry used numerous techniques that include measurement of galvanic currents, metal leaching, and weight loss. In general, as would be predicted based on results of the study of solubility and corrosion of pure zinc, chloride emerged as an aggressive ion whereas bicarbonate was beneficial to brass corrosion. Hardness had little impact, and phosphates, silicates and Zn+2 inhibitors had a significant short-term benefit but little long-term benefit.
The relationship between dezincification corrosion, lead leaching from brass, and water chemistry was investigated in Chapter 5. Surprisingly, lead and zinc leaching from a range of brasses were found to be negatively correlated. Hence, use of brasses that minimize dezincification problems might increase lead leaching.
This thesis represents a comprehensive analysis of factors that are influential for dezincification and lead leaching from brass in premise water distribution systems through literature reviews, mechanistic investigations, bench-scale experiments, and case studies. Results can be used by water utilities, plumbing engineers, manufacturers and home owners to better prevent, recognize, and mitigate brass and dezincification corrosion problems.Master of Scienc
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