Path Integral Quantisation of Finite Noncommutative Geometries

We present a path integral formalism for quantising gravity in the form of the spectral action. Our basic principle is to sum over all Dirac operators. The approach is demonstrated on two simple finite noncommutative geometries: the two-point space, and the matrix geometry M_2(C). On the first, the graviton is described by a Higgs field, and on the second, it is described by a gauge field. We start with the partition function and calculate the propagator and Greens functions for the gravitons. The expectation values of distances are evaluated, and we discover that distances shrink with increasing graviton excitations. We find that adding fermions reduces the effects of the gravitational field. A comparison is also made with Rovelli's canonical quantisation approach, and with his idea of spectral path integrals. We include a brief discussion on the quantisation of a Riemannian manifold.Comment: 12 pages, LaTeX2e, significantly revised. This is the published version with some minor addition

The bearable lightness of being

How are philosophical questions about what kinds of things there are to be understood and how are they to be answered? This paper defends broadly Fregean answers to these questions. Ontological categories-such as object, property, and relation-are explained in terms of a prior logical categorization of expressions, as singular terms, predicates of varying degree and level, etc. Questions about what kinds of object, property, etc., there are are, on this approach, reduce to questions about truth and logical form: for example, the question whether there are numbers is the question whether there are true atomic statements in which expressions function as singular terms which, if they have reference at all, stand for numbers, and the question whether there are properties of a given type is a question about whether there are meaningful predicates of an appropriate degree and level. This approach is defended against the objection that it must be wrong because makes what there depend on us or our language. Some problems confronting the Fregean approach-including Frege's notorious paradox of the concept horse-are addressed. It is argued that the approach results in a modest and sober deflationary understanding of ontological commitments

Multilinguals and Wikipedia Editing

This article analyzes one month of edits to Wikipedia in order to examine the role of users editing multiple language editions (referred to as multilingual users). Such multilingual users may serve an important function in diffusing information across different language editions of the encyclopedia, and prior work has suggested this could reduce the level of self-focus bias in each edition. This study finds multilingual users are much more active than their single-edition (monolingual) counterparts. They are found in all language editions, but smaller-sized editions with fewer users have a higher percentage of multilingual users than larger-sized editions. About a quarter of multilingual users always edit the same articles in multiple languages, while just over 40% of multilingual users edit different articles in different languages. When non-English users do edit a second language edition, that edition is most frequently English. Nonetheless, several regional and linguistic cross-editing patterns are also present

Computer program predicts thermal and flow transients experienced in a reactor loss- of-flow accident

Program analyzes the consequences of a loss-of-flow accident in the primary cooling system of a heterogeneous light-water moderated and cooled nuclear reactor. It produces a temperature matrix 36 x 41 /x,y/ which includes fuel surface temperatures relative to the time the pump power was lost

Engaging persons with mental illness and/or substance use disorder in care coordination services: an improvement project at a federally qualified community health center

Background: Mental health and substance use disorders seldom occur in isolation. They frequently accompany each other, as well as a substantial number of chronic general medical illnesses. Consequently, mental health conditions, substance-use disorders, and general health conditions are frequently co-occurring, and coordination of all of these types of health care is essential to improved health outcomes (Institute of Medicine, 2006). The U.S. system of healthcare is failing to identify, engage, and effectively treat people who are suffering from behavioral health conditions (Blanco, Coye, Knickman, Krishnan, Krystal, Pincus, Rauch, Simon, Vitiello, 2016). Because of poor coordination and lack of engagement, people often experience disrupted care and an over-reliance on emergency department and hospital care. At Lowell Community Health Center where this project takes place persons with a primary behavioral health diagnosis contribute to the highest utilization of emergency and inpatient hospital services. In July of 2018, Lowell CHC collaborated with Lowell House, Inc. to form a care coordination program to outreach and engage individuals identified as high utilizers of inpatient and emergency hospital services. Aim: The aim of this project is to describe the attributes of the population of patients who successfully engaged into care for the first six months of this new program, with recommendations for improvement to inform future program design. Method: The population of patients who successfully engaged in care in the first 6 months of the program described by independent variables consisting of age, gender, race, and preferred language. Dependent variable consisting of type of outreach. Data was evaluated to determine attributes of patients who successfully engaged in care and if correlations exist between variables and successful engagement. Results: The first six months of the program implementation demonstrated successful engagement and activation of 17.5% of patients. The average patient is described as low-income, 50-64 years of age, non-English speaking female with dual-diagnosis residing in the greater Lowell area. Themes regarding successful outreach type included telephonic and face-to-face being the most successful method of engagement. Although successful engagement was noted, longer-term efforts and analysis should focus on successful outreach and engagement strategies, emergency room utilization, treatment adherence and service adherence. Conclusions: The findings of this project indicate that having a team-based, multidisciplinary and multi-cultural approach to care coordination has led to successful engagement of 186 individuals within the first 6 months of this new program

A test of the electromagnetic theory of the hydrogen vortices surrounding sun-spots

The extensive fields of force shown by the spectroheliograph in the hydrogen atmosphere surrounding sun-spots have been explained in two different ways: (1) as true hydrodynamical vortices, resembling great tornadoes, and (2) as electromagnetic phenomena, in which charged particles moving in the solar atmosphere are constrained by the magnetic fields in the spots to follow their lines of force. The principles involved in the electromagnetic theory have been applied to the explanation of the terrestrial aurora by Stormer, who has also developed this theory for the case of sun-spots.(1