TRANSPORTATION,RACE AND EMPLOYMENT: IN PURSUIT OF THE ELUSIVE TRIAD

The purpose of this paper is to re-examine the question of whether minorities have greater difficulties in finding and holding jobs because of the poor public transportation serving their neighborhoods and the relatively low ownership of automobiles. Earlier studies generally concluded that transportation was not a major reason for the high unemployment and low incomes characteristic of inner city minority areas. We review this literature and conclude that previous findings may understate the relationship. From survey data of workers in three companies and unemployed workers seeking jobs in the same labor market, we examine whether there are statistically significant differences by race or ethnicity associated with transportation need, availability and use. Our findings indicate that transportation does play an important role in differences in labor market outcomes for minorities and nonminorities. We also find that these outcomes are different for blacks and Latinos.     

A note on an LQG regulator with Markovian switching and pathwiseaverage cost

We study a linear system with a Markovian switching parameter perturbed by white noise. The cost function is quadratic. Under certain conditions, we find a linear feedback control which is almost surely optimal for the pathwise average cost over the infinite planning horizon     

Believability of expert and lay witnesses: Implications for trial consultation.

Attorneys are often skeptical, with good reason, about the extent to which research findings and psychological principles may apply to the members of their jury pool. It is important for attorneys as well as psychologists who provide consultation services to have access to base-rate opinions about the consultation issues. This article reports the results of a statewide telephone survey of 488 adult residents who answered questions about the believability of expert witnesses and criminal defendants who testify. The survey questions were designed to provide "local" base-rate data about issues that arise in 3 areas of consultation work with attorneys: public perceptions of witness preparation with criminal defendants, expectations of criminal defendant demeanor, and judgments with respect to expert-witness characteristics that might be associated with being a "hired gun." Implications for psychologists who work as trial consultants and expert witnesses are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

OC-12/STS-3c/ATM interface for gigabit network applications

The implementation of an experimental OC-12/STS-3c/ATM transmission interface is described. This interface maps four streams of ATM cell data into the SONET STS-3c transmission format and multiplexes these channels onto a single OC-12 (622 Mbit/s) optical signal. The interface also performs the reverse demultiplexing functions. This application represents the first known demonstration of a 622 Mbit/s ATM workstation interface.<>     

Cylindrical ultrasonic transducers for cardiac catheter ablation

This study was designed to evaluate the feasibility of using cylindrical ultrasound transducers mounted on a catheter for the ablation of cardiac tissues. In addition, the effects of ultrasound frequency and power was evaluated both using computer simulations and in vitro experiments. Frequencies of 4.5, 6, and 10 MHz were selected based on the simulation studies and manufacturing feasibility. These transducers were mounted on the tip of 7-French catheters and applied in vitro to fresh ventricular canine endocardium, submerged in flowing degassed saline at 37°C. When the power was regulated to maintain transducer interface temperature at 90-100°C, the 10-, 6-, and 4.5-MHz transducers generated a lesion depth of 5.9±0.2 mm, 4.6±1.0 mm, and 5.3±0.9 mm, respectively. The 10-MHz transducer was chosen for the in vivo tests since the maximum lesion depth was achieved with the lowest power. Two dogs were anesthetized and sonications were performed in both the left and right ventricles. The 10-MHz cylindrical transducers caused an average lesion depth of 6.4±2.5 mm. In conclusion, the results show that cylindrical ultrasound transducers can be used for cardiac tissue ablation and that they may be able to produce deeper tissue necrosis than other methods currently in use     

Photodynamic therapy (PDT) and photodiagnosis (PD) using endogenous photosensitization induced by 5-aminolevulinic acid (ALA): current clinical and development status

Although low levels of social support have been related to mortality from coronary heart disease, little is known about the role of social support among Mexican Americans. The authors therefore examined the relationship between social support and long-term survival in the Corpus Christi Heart Project. They developed a social support scale that used data collected during in-hospital interviews of 292 Mexican Americans and 304 non-Hispanic Whites who survived a myocardial infarction for more than 28 days. The scale incorporated three measures: marital status; if not married, whether living alone; and whether advised to seek help. During an average follow-up period of 43 months, 115 participants died. Survival following myocardial infarction was greater for those with high or medium social support than for those with low social support. With age, gender, ethnicity, education, employment, smoking, diabetes, hypertension, and hypercholesterolemia included in a proportional hazards regression model, the relative risk of mortality was 1.89 (95% CI, 1.20-2.97) for those with low social support. But when the two ethnic groups were analyzed separately, low social support was no longer a significant predictor of mortality for non-Hispanic Whites, whereas for Mexican Americans, the relative risk of mortality was 3.38 (95% CI, 1.73-6.62) for those with low social support.     

Antigenic specificity of lymphocytes isolated from valvular specimens of rheumatic fever patients

T cell lines were established from both valvular specimens and peripheral blood lymphocytes from seven patients with well documented rheumatic heart disease. These cell lines were stimulated with either PHA or streptococcal antigens. Proliferation assays revealed that both valvular and peripheral blood T cell lines reacted to cell wall (CW) and cell membrane (CM) antigens obtained from rheumatic fever associated group A streptococci and not to nephritogenic strains. None of the cell lines reacted to M protein, myosin or other mammalian cytoskeletal proteins. The unique reactivity of rheumatic fever T cell lines only to cellular structures obtained from rheumatogenic strains suggests that these lines react to epitopes specific for antigens obtained from these strains.     

Referent Systems and Relational Grammar

Relational Grammar (RG) was introduced in the 1970s as a theory of grammatical relations and relation change, for example, passivization, dative shift, and raising. Furthermore, the idea behind RG was that transformations as originally designed in generative grammar were unable to capture the common kernel of, e.g., passivization across languages. The researchconducted within RG has uncovered a wealth of phenomena for which it could produce a satisfactory analysis. Although the theory of Government and Binding has answered some of the complaints, still it left many phenomena unaccounted for. Referent Systems (RSs) have been introduced by Vermeulen (1995) to overcome certain weaknesses of Dynamic Semantics. Their usefulness has not yet been realized in semantical theory. We shall show here that their significance cannot be overestimated. Namely, we will show in this paper that there exists a fundamental affinity to RG. Both handle the relation between an argument and a functor by means of a shared relational sign, which is unique for each argument. This assignment can be changed. What is interesting is that the notion of a chômeur, which is central to RG, finds a natural treatment in RSs. This coincidence is in our view not accidental but reveals some fundamental properties of the human language faculty.