Homeownership Across the American Life Course: Estimating the Racial Divide

Homeownership has historically been viewed as a fundamental piece of the American Dream, with up to 70 percent of households owning their home as of 2006. Yet it has also been demonstrated that nonwhites are less likely to own a home and that the value of their homes is much less than that for whites, even when social class is taken into account. This paper explores the overall life course patterns of homeownership and the importance of racial differences in understanding those dynamics. Based upon a life table methodology, we examine the homeownership patterns for individuals between the ages of 25 to 55 using 36 waves of the Panel Study of Income Dynamics. Our findings indicate that although the vast majority of nonwhites will eventually become homeowners, there is nevertheless a significant racial divide in the patterns of homeownership. Nonwhites are less likely than whites to become homeowners, are more likely to purchase their first home at a later age, are less likely to have acquired as much equity in their home, and are less likely to own their home outright. The implications of these findings are discussed within the overall context of racial stratification in America

Estimating the Life Course Dynamics of Asset Poverty

Poverty can be conceptualized and measured in several different ways. The most common approach has been to rely on a scarcity of income as the basis for poverty. This paper analyzes poverty using a relatively new and alternative measuring stick—that of asset poverty. Using data from the Panel Study of Income Dynamics, we examine the extent to which individuals have enough assets to allow them to live for three months above the official poverty line. Households that fail to have the necessary amount of assets are considered asset poor. Three different measures of counting assets are used in this paper—net worth; financial wealth; and liquid wealth. We construct a series of life tables that allow us to examine the period, cohort, and age patterns of asset poverty from 1984 to 2004. Our results indicate that asset poverty is widespread across the life course. The vast majority of those in early adulthood will experience asset poverty in terms of their net worth, financial wealth, and liquid wealth. For those in the middle and later stages of the life course, there remains a substantial risk of encountering financial wealth and liquid wealth asset poverty. In addition, individuals who have less education, are not married, are black, and who do not own a home, are all significantly more likely to experience asset poverty. The policy implications of these findings are discussed

American Poverty as a Structural Failing: Evidence and Arguments

Empirical research on American poverty has largely focused on individual characteristicst o explain the occurrence and patternso f poverty. The argument in this article is that such an emphasis is misplaced. By focusing upon individual attributes as the cause of poverty, social scientists have largely missed the underlying dynamic of American impoverishment. Poverty researchers have in effect focused on who loses out at the economic game, rather than addressing the fact that the game produces losers in the first place. We provide three lines of evidence to suggest that U.S. poverty is ultimately the result of structural failings at the economic, political, and social levels. These include an analysis into the lack of sufficient jobs in the economy to raise families out of poverty or near poverty; a comparative examination into the high rates of U.S. poverty as a result of the ineffectiveness of the social safety net; and the systemic nature of poverty as indicated by the life course risk of impoverishment experienced by a majority of Americans. We then briefly outline a framework for reinterpreting American poverty. This perspective incorporates the prior research findings that have focused on individual characteristics as important factors in who loses out at the economic game, with the structural nature of American poverty that ensures the existence of economic losers in the first place

Effect of Perflubron-induced lung growth on pulmonary vascular remodeling in congenital diaphragmatic hernia

Congenital diaphragmatic hernia (CDH) involves lung hypoplasia and pulmonary hypertension (PH). Post-natal Perflubron ventilation induces lung growth. This phenomenon is called Perflubon-induced lung growth (PILG). However, it does not appear to ameliorate PH in CDH. We aim to determine the effect of PILG on pulmonary vascular remodeling in neonates with CDH and PH requiring extracorporeal membrane oxygenation (ECMO)

Chest Radiographs Are Valuable in Demonstrating Clinically Significant Pacemaker Complications That Require Reoperation

AbstractPurposeTo evaluate the utility of chest radiography in demonstrating clinically significant pacemaker complications that required reoperation.MethodsIn this retrospective case-controlled series, we identified 14 consecutive adults who required pacemaker reoperation and who had chest radiographs available for review (6 men, 8 women; mean age, 71 years [range, 43–95 years]). Ten patients had pacemakers implanted at our institution, and 4 were referred for reoperation. Forty-two controls, 3 for each patient, had postoperative chest radiographs and normal device function (25 men, 17 women; mean age 76 years [range, 37–96 years]). All postoperative chest radiographs, including 1-year follow-ups, were blindly reviewed by at least 2 of 4 radiologists for lead perforation and position of right atrial and right ventricular leads. Follow-up radiographs were assessed for lead perforation, lead displacement, and lead fracture. Data were analysed by using the Fisher exact test.ResultsOf the patients, 1.7% (10/581) required reoperation for pacemaker dysfunction (noncapture, oversensing, abnormal atrial and ventricular thresholds, failing impedance), extracardiac stimulation, and lead perforation and/or displacement. There were no lead fractures. Chest radiographs demonstrated pacemaker complications in 57% of patients (8/14) at a median of 2 days (<1–32 days) after implantation and in 5% of the controls (2/42) (P < .0001). None of the abnormalities were noted on the official reports. Among subgroups, chest radiographs were abnormal for the following indications: pacemaker dysfunction in 4 of 7 patients versus 0 of 21 controls (P = .0017), extracardiac stimulation in 1 of 3 patients vs 0 of 9 controls (P = .25), and lead perforation and/or displacement in 3 of 4 patients vs 2 of 12 controls (P = .06).ConclusionsChest radiographs are useful after pacemaker placement and demonstrate the majority of complications that require reoperation. Familiarity with the expected normal position of the leads, appearances of pacemaker complications, and comparison with prior radiographs is crucial in rendering a correct diagnosis that guides patient management

Axoplasmic flow of tritiated proline in the corticospinal tract of the rat

The rates of axoplasmic transport were studied in the corticospinal tract of the rat by injecting tritiated proline into the sensory-motor cortex and subsequently analyzing the distribution of incorporated label in the spinal cord at intervals after injection. A mathematical model of the anatomy of the corticospinal tract was developed and used in analysis of the data. The rate of a fast component was calculated to be 240–420 mm per day, which is comparable with rates of fast components in the peripheral nervous system (PNS), but considerably greater than rates in other tracts in the central nervous system. A slow component was calculated to have a transport rate of 3–8 mm per day which is greater than rates found either in the CNS or PNS. This higher rate may be related to the greater length of the corticospinal tract as compared to other CNS tracts studied.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47674/1/441_2004_Article_BF00249212.pd

Inhibition of breathing after surfactant depletion is achieved at a higher arterial PCO(2 )during ventilation with liquid than with gas

BACKGROUND: Inhibition of phrenic nerve activity (PNA) can be achieved when alveolar ventilation is adequate and when stretching of lung tissue stimulates mechanoreceptors to inhibit inspiratory activity. During mechanical ventilation under different lung conditions, inhibition of PNA can provide a physiological setting at which ventilatory parameters can be compared and related to arterial blood gases and pH. OBJECTIVE: To study lung mechanics and gas exchange at inhibition of PNA during controlled gas ventilation (GV) and during partial liquid ventilation (PLV) before and after lung lavage. METHODS: Nine anaesthetised, mechanically ventilated young cats (age 3.8 ± 0.5 months, weight 2.3 ± 0.1 kg) (mean ± SD) were studied with stepwise increases in peak inspiratory pressure (PIP) until total inhibition of PNA was attained before lavage (with GV) and after lavage (GV and PLV). Tidal volume (V(t)), PIP, oesophageal pressure and arterial blood gases were measured at inhibition of PNA. One way repeated measures analysis of variance and Student Newman Keuls-tests were used for statistical analysis. RESULTS: During GV, inhibition of PNA occurred at lower PIP, transpulmonary pressure (Ptp) and Vt before than after lung lavage. After lavage, inhibition of inspiratory activity was achieved at the same PIP, Ptp and Vt during GV and PLV, but occurred at a higher PaCO(2 )during PLV. After lavage compliance at inhibition was almost the same during GV and PLV and resistance was lower during GV than during PLV. CONCLUSION: Inhibition of inspiratory activity occurs at a higher PaCO(2 )during PLV than during GV in cats with surfactant-depleted lungs. This could indicate that PLV induces better recruitment of mechanoreceptors than GV

Slate Literary Magazine, 2012-2013

Trinity College\u27s Literary Magazine - student works.https://digitalrepository.trincoll.edu/slate/1000/thumbnail.jp

Regulating Assisted Reproduction in Canada, Switzerland, and the USA: Comparing the Judicialization of Policy-making

This article analyses the extent to which courts shape policies for assisted reproduction. While the USA is considered to be the most litigious country, Canada has observed a growing involvement of the courts from the 1980’s onward, and Switzerland is characterized by a modest degree of judicialization. Based on national patterns, we would expect litigation and court impact to vary across these three countries. As this paper demonstrates, policy-process specific variables such as the structure of policy conflicts, the novelty of regulation, self-regulation by key stakeholders, and the policies in place better explain the variation in the judicialization of policy-making

Oxygen consumption and carbon dioxide production during liquid ventilation

Liquid ventilation with perfluorocarbon (PFCV) has advantages over conventional gas ventilation (GV) in premature and lung-injured newborn animals. Indirect calorimetric measurement of both oxygen consumption (VO2) and carbon dioxide production (VCO2) during PFCV has not been previously performed. In addition, comparison to indirect calorimetric measurement of VO2 and VCO2 during GV has not been evaluated. Ten fasted normal cats weighing 2.6 to 3.9 kg were anesthetized with pentobarbital and pancuronium. Tracheostomy was performed. Gas exchange was measured across the native lung during GV and across the membrane lung of the liquid ventilator during PFCV. VO2 was measured using a modification of a previously described, indirect, closed-circuit, volumetric technique. VCO2 was analyzed by capnographic assay of the mixed-expired closed-circuit air. The VCO2/VO2 ratio (RQ) was calculated. There was no change in VO2, VCO2, or RQ during PFCV when compared with GV (VO2: GV = 5.7 +/- 0.3 mL/kg/min, PFCV = 5.6 +/- 0.5 mL/kg/min [P = NS]; VCO2 : GV = 4.9 +/- 1.1 mL/kg/min, PFCV = 4.8 +/- 0.9 mL/kg/min [P = NS]; RQ: GV = 0.85 +/- 0.21, PFCV = 0.86 +/- 0.21 [P = NS]). During GV the PaO2 was higher than during PFCV (PaO2: GV = 335 +/- 70 mm Hg, PFCV = 267 +/- 83 mm Hg [P = .04]), as is expected because of the relative reduction in the inspiratory PiO2 of the perfluorocarbon during liquid ventilation. There was no significant change in the PaCO2 (PaCO2: GV = 37.3 +/- 2.2 mm Hg, PFCV = 40.4 +/- 5.3 mm Hg [P = NS] or the pH (pH: GV = 7.34 +/- 0.04, PFCV = 7.35 +/- 0.06 [P = NS]). This study demonstrates the efficacy of measuring VO2 and VCO2 during gas and liquid ventilation using an indirect calorimetric technique. The data demonstrate that VO2 and VCO2 do not change during liquid ventilation and that excellent gas exchange can be accomplished through PFCV.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/30885/1/0000553.pd