Another Anniversary

It will be another 73 years before it will be possible to write about 125 years of medical mission work in The Lutheran Church-Missouri Synod. Mother Synod, like Elizabeth, conceived this child in her old age, years after her sisters (if I may be so bold) in the faith had given birth to their medical mission work. The older hospitals in foreign lands were started by Roman Catholics, Presbyterians, Anglicans, Baptists, Methodists, and other Lutherans. Missouri is a late comer, and after 52 years, her child still does not have much to show and tell

Mineral composition in relation to particle size for a Missouri plastic fire clay

From the rather modest beginning of the refractory industry in Missouri prior to the Civil War, the industry has grown to challenge those of other states as the third largest producer of refractory clays and products in the United States. As Roberts (1950) points out, the development of the metallurgical and glass industries increased the demand for high grade refractory materials. A prominent factor in the development of the fire clays of Missouri was the discovery that flint clay could be mixed with the plastic or semi-plastic refractory clays to yield an excellent product. Perhaps the most important reason many eastern manufacturers set up plants in Missouri is the close proximity to high quality plastic, semi-plastic, flint; and diaspore-clay deposits. Their rather shallow depth permits them to be extracted by economical open-pit methods which replaced the inefficient underground mining methods of the early 1920\u27s. As the refractory industry became big business, it adapted the futuristic outlook of big business. Common practice in the clay industry had been to stockpile only enough clay for immediate needs, as the cost of production included relatively high processing costs and the cost of the raw materials has to be kept to an absolute minimum. Clay deposits were discovered by examining outcrops exposed in stream banks and road cuts. Occasionally, someone drilling for water would discover a good clay. Now extensive scientific prospecting methods directed by technically trained personnel are employed (Bradley and Miller, 1942; W.D. Keller, 1949, pp. 451-454). While the importance of the high grade clay deposits of Missouri is generally recognized, the only extensive investigations published to date have been concerned with the distribution and genesis of the deposits. Very little work has been done regarding the detailed mineralogy of these clays. One has only to look at the works of Grim (1939a; 1939b, 1946) to get an appreciation of the importance minor clay constituents have on the properties of the whole clay. For example, montmorillonite leads illite and kaolinite, in that order, in properties of plasticity, drying shrinkage, bonding power and response to exchangeable bases. Even undetectable amounts of montmorillonite or illite in a kaolin may cause it to exhibit properties not common to kaolionite. Detailed investigation of these clays will help us to better understand some of their “unusual” properties. Results of these investigations may also be used to correlate various clay deposits on the basis of their clay mineral content after more information has been accumulated. There is still lacking in the literature enough information on clay mineral assemblages to develop uncontradictory paragenetic relations. In other words, clay mineral alteration sequences are still obscure. With these considerations in mind, the Department of Geology has set up a Clay Mineral Project, the purpose of which is to investigate more thoroughly the clay mineral content of Missouri clays and shales. This is the initial paper of the project. It purports to study the methods of investigating clays, to adapt standard methods to the facilities available, and to report the mineral content of a Missouri plastic refractory clay. It is hoped that this paper will stimulate interest in Missouri clays --Introduction, pages 1-3

Friends of the Lake? The Megacolector Conflict and the Revindication of Tz’unun Ya’

There is growing recognition that radical ontological difference underlies Indigenous communities’ opposition to extractivist development within their territories, particularly as they increasingly turn to a ‘rights of nature’ discourse to articulate their resistance. Scholars writing from the perspectives of political ontology and decolonial theory excitedly posit the possibility of the pluriverse emerging from the ‘ontological openings’ (de la Cadena, 2015a) and ‘decolonial cracks’ (Walsh, 2018) that these struggles are forming in the project of modernity. While such accounts are useful in elucidating how such struggles are more than ‘mere resource conflicts’ (Coombes et al., 2012a), they also risk reifying ontological difference and losing sight of their pragmatic functions. More than just a matter of academic debate, over-stating the ontological difference of Indigenous opposition to extractivism is a ‘cosmopolitical risk’ (Cepek, 2016) that has the potential to limit Indigenous communities’ aspirations for self-determination. As a consequence, this research suggests a way forward can be found in ‘ontologizing political economy’ (Burman, 2016) whilst also paying closer attention to ontological ambiguities as evidenced by the concepts of ‘transmodernity’ (Dussel, 2012), ‘partial connections’ (de la Cadena, 2015a) and ‘ch’ixi’’ (Rivera Cusicanqui, 2012). This research fleshes out these concerns through an ethnographic engagement with the Guatemalan Tz’utujil community of San Pedro, and its opposition to a wastewater megaproject, the ‘megacolector’ being advanced by a local environmental NGO ‘Friends of the Lake’ as a solution to Lake Atitlán’s contamination. I apply a lens of political ontology and MCD to examine Pedrano community leaders’ objections to the megacolector, but also to cast an eye to the wider community, and the initiatives of artists, poets, rappers, educators, agronomists, and spiritual guides. In doing so I demonstrate that beyond being a resource conflict and an ontological conflict, Pedranos’ opposition is most significantly tied to a wider project of revindication, that is, efforts to reclaim San Pedro’s epistemic and political autonomy

Regional or consolidated district high school with special applications to the town of Clinton, Connecticut

Thesis (Ed.M.)--Boston Universit

Prediction of the Flow and Heat Transfer between a Rotating and a Stationary Cone

Access to the full-text thesis is no longer available at the author's request, due to 3rd party copyright restrictions. Access removed on 28.11.2016 by CS (TIS).Metadata merged with duplicate record (http://hdl.handle.net/10026.1/1069) on 20.12.2016 by CS (TIS).This thesis is concerned with the development of a theoretical method for predicting the turbulent flow and heat transfer in the cavity between a rotating and a stationary cone. The motivation for the work stems from the need, in the design process for the gas turbine aero-engine, for a fast and reliable predictive method for such flows. The method developed here is the integral method, which reduces the governing partial differential equations to ordinary differential equations. A number of solution methods for these equations are described, and the optimum in terms of speed and accuracy is indicated. Predicted moment coefficients compare well with experimental data. For half-cone angles greater than approximately 60° but poorly for half cone angle less than approximately 45°. The poor agreement for small cone angles is thought to be due to the presence of Taylor-type vortices, which cannot be incorporated into the integral method. Heat transfer is incorporated into the method using the Reynolds analogy. Due to the lack of experimental data, heat transfer predictions are compared with those from a finite difference program and show encouraging agreement. A computer program which solves the full Reynolds-averaged Navier-Stokes and energy equations in steady and axisymmetric form, using a finite-difference method is modified for use in the conical geometry. Comparison of the predicted moment coefficients with experimental data shows no marked improvement over the integral method. Examination of the secondary flow predicted by the program shows it to be similar to that of the integral method. The failure of the program to predict Taylor-type vortices may be attributed to the fact that they are non-axisymmetric and/or unsteady. The assumptions underlying the Integral method are investigated via the finite difference program and it is concluded that they are valid for half cone angles as small as 15°. Based on the results of the finite difference program, the Integral method is modified to allow for a rectangular outer shroud, and a new model for the stator is described. It is concluded that both the integral method and the finite difference program can be used safely in rotor-stator systems where the half cone angle is greater than about 60°.Rolls-Royce pl

Parallel solution of high-order numerical schemes for solving incompressible flows

A new parallel numerical scheme for solving incompressible steady-state flows is presented. The algorithm uses a finite-difference approach to solving the Navier-Stokes equations. The algorithms are scalable and expandable. They may be used with only two processors or with as many processors as are available. The code is general and expandable. Any size grid may be used. Four processors of the NASA LeRC Hypercluster were used to solve for steady-state flow in a driven square cavity. The Hypercluster was configured in a distributed-memory, hypercube-like architecture. By using a 50-by-50 finite-difference solution grid, an efficiency of 74 percent (a speedup of 2.96) was obtained

A Hybrid System for Well Test Analysis

Petroleum well test analysis is a tool for estimating the average properties of the reservoir rock. It is a classic example of an inverse problem. Visual examination of the pressure response of the reservoir to an induced flow rate change at a well allows the experienced analyst to determine the most appropriate model from a library of generalized analytical solutions. Rock properties are determined by finding the model parameters that best fit the observed data. This paper describes a framework for hybrid network to assist the analyst in selecting the appropriate model and determining the solution. The hybrid network design offers significant advantages by reducing training time and allowing incorporation of both symbolic and numeric data. The network structure is described and the advantages and disadvantages compared to previous approaches are discusse

Analyzing high energy physics data using database computing: Preliminary report

A proof of concept system is described for analyzing high energy physics (HEP) data using data base computing. The system is designed to scale up to the size required for HEP experiments at the Superconducting SuperCollider (SSC) lab. These experiments will require collecting and analyzing approximately 10 to 100 million 'events' per year during proton colliding beam collisions. Each 'event' consists of a set of vectors with a total length of approx. one megabyte. This represents an increase of approx. 2 to 3 orders of magnitude in the amount of data accumulated by present HEP experiments. The system is called the HEPDBC System (High Energy Physics Database Computing System). At present, the Mark 0 HEPDBC System is completed, and can produce analysis of HEP experimental data approx. an order of magnitude faster than current production software on data sets of approx. 1 GB. The Mark 1 HEPDBC System is currently undergoing testing and is designed to analyze data sets 10 to 100 times larger