Architectures for reasoning in parallel

The research conducted has dealt with rule-based expert systems. The algorithms that may lead to effective parallelization of them were investigated. Both the forward and backward chained control paradigms were investigated in the course of this work. The best computer architecture for the developed and investigated algorithms has been researched. Two experimental vehicles were developed to facilitate this research. They are Backpac, a parallel backward chained rule-based reasoning system and Datapac, a parallel forward chained rule-based reasoning system. Both systems have been written in Multilisp, a version of Lisp which contains the parallel construct, future. Applying the future function to a function causes the function to become a task parallel to the spawning task. Additionally, Backpac and Datapac have been run on several disparate parallel processors. The machines are an Encore Multimax with 10 processors, the Concert Multiprocessor with 64 processors, and a 32 processor BBN GP1000. Both the Concert and the GP1000 are switch-based machines. The Multimax has all its processors hung off a common bus. All are shared memory machines, but have different schemes for sharing the memory and different locales for the shared memory. The main results of the investigations come from experiments on the 10 processor Encore and the Concert with partitions of 32 or less processors. Additionally, experiments have been run with a stripped down version of EMYCIN

Reducing Effects of Plagiarism in Programming Classes

Large programming classes are traditionally an area of concern for maintaining the integrity of the educational process. Systematic inspection of all program solutions for evidence of plagiarism can be done using an automated tool. The Measure Of Software Similarity tool developed by Alex Aiken at the University of California at Berkeley analyzes a set of programs to detect evidence of “duplicates.” However, experience in applying this sort of plagiarism detection in a large programming class indicates that the main long-term effect may be to simply shift the source of plagiarism. This possibility leads to considering the reason for fighting plagiarism and then to exploring additional techniques aimed at reducing the perceived motivation for plagiarism

Conceptualizing Equity in the Implementation of California Education Finance Reform

We examine how district administrators’ conceptions of equity relate to the implementation of finance reform. We use sensemaking theory and four views of equity—libertarian, liberal, democratic liberal, and transformative—to guide a case study of two districts, finding evidence of two conceptions of equity: (1) greater resources for students with greater needs and (2) equal distribution of resources for all students. One district demonstrated an organization-wide belief in the first conception, whereas the other conveyed individual-level understandings of both conceptions. These beliefs were mirrored in resource allocation decisions and informed by districts’ student demographics, organizational identities, and perceptions of adequacy

New Mechanism of Flavor Symmetry Breaking from Supersymmetric Strong Dynamics

We present a class of supersymmetric models in which flavor symmetries are broken dynamically, by a set of composite flavon fields. The strong dynamics that is responsible for confinement in the flavor sector also drives flavor symmetry breaking vacuum expectation values, as a consequence of a quantum-deformed moduli space. Yukawa couplings result as a power series in the ratio of the confinement to Planck scale, and the fermion mass hierarchy depends on the differing number of preons in different flavor symmetry-breaking operators. We present viable non-Abelian and Abelian flavor models that incorporate this mechanism.Comment: 24 pp. LaTe

Algorithm to Diagnose Leaks or Blockages Downstream of the Secondary Air Injection Reaction (SAIR) Pressure Sensor

A control module and method for an exhaust system of an engine can include a secondary air intake (SAI) pressure module that monitors SAI pressure. An accumulation module can accumulate an SAI string length based on the monitored SAI pressure. A calculation module can determine an average SAI string length based on the accumulated SAI string length. A determination module can determine an operating characteristic of the vehicle exhaust based on the average SAI string length

Advancing Equity In The Pandemic Treaty

There is a broad consensus around equity’s importance. Even countries that hoarded supplies during the acute phase of COVID-19 seem to understand that the international community must find a means to ensure fairer allocation of medical resources when the next health crisis hits. But there has been little agreement about the concrete steps needed to operationalize fairer access and benefit sharing. That is, what are the workable mechanisms that could reduce the divide between richer and poorer populations? The World Health Assembly, the governing body of the World Health Organization, has appointed an Intergovernmental Negotiating Body to develop a pandemic convention, agreement, or other instrument under the WHO constitution. The February 2023 draft is designed “to achieve greater equity … through the fullest national and international cooperation.” It is important that the negotiators develop specific, measurable metrics that directly impact equity. The mechanisms and metrics agreed upon should allow the public to evaluate whether a more equitable system is emerging through this new regime. Equity won’t just happen. We need to plan and prepare for equity, and we need international norms with which nations must comply to achieve the fairness we strive for

Increased Rate of Hospitalization for Diabetes and Residential Proximity of Hazardous Waste Sites

BACKGROUND: Epidemiologic studies suggest that there may be an association between environmental exposure to persistent organic pollutants (POPs) and diabetes. OBJECTIVE: The aim of this study was to test the hypothesis that residential proximity to POP-contaminated waste sites result in increased rates of hospitalization for diabetes. METHODS: We determined the number of hospitalized patients 25–74 years of age diagnosed with diabetes in New York State exclusive of New York City for the years 1993–2000. Descriptive statistics and negative binomial regression were used to compare diabetes hospitalization rates in individuals who resided in ZIP codes containing or abutting hazardous waste sites containing POPs (“POP” sites); ZIP codes containing hazardous waste sites but with wastes other than POPs (“other” sites); and ZIP codes without any identified hazardous waste sites (“clean” sites). RESULTS: Compared with the hospitalization rates for diabetes in clean sites, the rate ratios for diabetes discharges for people residing in POP sites and “other” sites, after adjustment for potential confounders were 1.23 [95% confidence interval (CI), 1.15–1.32] and 1.25 (95% CI, 1.16–1.34), respectively. In a subset of POP sites along the Hudson River, where there is higher income, less smoking, better diet, and more exercise, the rate ratio was 1.36 (95% CI, 1.26–1.47) compared to clean sites. CONCLUSIONS: After controlling for major confounders, we found a statistically significant increase in the rate of hospitalization for diabetes among the population residing in the ZIP codes containing toxic waste sites