Method of Removing Carbon from Fly Ash

An improved froth flotation method is provided for the removal and recovery of an ultra-fine constituent such as carbon from tailings such as fly ash. A flotation apparatus is utilized that preferably includes a slurry conditioning tank and a flotation cell. The method of the present invention comprises the improvement of utilizing a flotation reagent formulation comprising a mixture of fuel oil and petroleum sulfonate. The method broadly includes the steps of (1) producing a slurry, or solid suspension, of the material containing the constituent to be recovered by adding a preselected amount of water or other slurrying liquid; (2) adding the flotation reagent comprising a mixture of fuel oil and petroleum sulfonate to the slurry that renders the selected constituent hydrophobic; (3) aerating the conditioned slurry; (4) recovering the selected ultra-fine constituent from an upper portion of the flotation apparatus; and (5) withdrawing and recovering tailings from a lower portion of the flotation apparatus

Volume 1, Number 02, February, 1865

https://place.asburyseminary.edu/reposofholiness/1001/thumbnail.jp

Volume 1, Number 01, January, 1865

https://place.asburyseminary.edu/reposofholiness/1000/thumbnail.jp

Volume 1, Number 03, March, 1865

https://place.asburyseminary.edu/reposofholiness/1002/thumbnail.jp

Non-symmetric liquid crystal dimer containing a carbohydrate-based moiety

Peer reviewedPublisher PD

Dueling Stakeholders and Dual-Hatted Systems Engineers: Engineering Challenges, Capabilities and Skills in Government Infrastructure Technology Projects

An earlier version of this work was presented at the EGOS 2008 Summer Colloquium.Engineering projects that support government enterprises face substantial challenges due to demands from diverse stakeholders and rapidly-changing technologies. In this paper, we present findings from analysis of five case studies of systems engineering projects for large government enterprises. We focus on what can be learned from systems engineers, their essential role, and their engineering practices. As they work to establish interoperability across pre-existing and new technologies - thereby evolving infrastructure - the engineers commonly face “agonistic” tensions between groups of stakeholders. Temporal pacing conflicts are especially prevalent, such as those between stakeholder groups concerned with fast-paced streams of innovation and stakeholder groups concerned with current operations. In response, many engineers are following an evolutionary approach, developing new capabilities for managing projects and individual professional skill sets. The engineers’ adaptive response can be understood as incremental modularization and re/integration of technologies and associated practices across organizational (stakeholder) boundaries. Additionally, engineers are developing new skills of influence to support these capabilities for addressing stakeholder tensions. We close by discussing implications of our findings for the management of infrastructure technology projects, emergent design and engineering of organizational infrastructure, and the changing role of systems engineers

The Changing Nature of Systems Engineering and Government Enterprises: Report from a Case Study Research Effort

In this paper, we examine the changing nature of systems engineering work and, in particular, how The MITRE Corporation is confronting the challenges of expanding its role and capabilities to deliver what it calls “Enterprise Systems Engineering” to its government clients. Systems engineers exemplify technical knowledge workers whose work is expanding beyond the traditional skills and habits of thought developed through their disciplinary training (cf., Davidz 2006). Changes in technology, systems acquisition practices, and enterprise structures are challenging systems engineers to expand their roles and capabilities to manage the boundaries among technological systems and organizations of many sizes and types (e.g., government customers, systems integrators, suppliers, end users). Systems development takes place in an ever more complex environment of inter-organizational enterprises where implementation increasingly catalyzes enterprise change and demands greatly expanded and often unrecognized roles beyond that of technical expert or project manager

A Matrix of Feedback for Learning

The present study used an established model of feedback (Hattie & Timperley, 2007) as a framework to explore which types and levels of feedback are most common in the upper primary classroom. Results demonstrate that feedback was predominantly directed toward the task level and that feed forward, information about the next steps for learning, was the least occurring feedback type in the classroom. Based upon research and findings, the authors propose a conceptual matrix of feedback that bridges research to practice with the aim of feedback being a driver to promote improvement

A Study of the Retail Trading Area of Denton, Texas

"The purpose of this study is to find what information is available from secondary sources on retail trade areas and to assemble and analyze it so that the information will be of value to those interested in the economy of the area...the following general conclusions are drawn: 1. The Denton retail trade area is primarily agricultual. Indicators of this fact are so many and so definite that there is little doubt but that agriculture and the rural population of the area will affect, to a considerable extent all business activity. 2. In 1947, the Denton retail trade area was not highly industrialized. The trading center is not centrally located within the state of Texas, but several markets are a few miles away. A good supply of labor is available within the area. With the present trend toward decentralization of industry, these facts point toward an expansion of manufacturing in the trade area. 3. In 1948, retailing in the trade center and in the area as a whole indicates a strong retail trade center. 4. The fact that the retail trade center would be a good sampling area for companies introducing new products is indicated by the youth of the population of the center. 5. A good market for fashion goods is revealed by the large population of females in the area. 6. In 1948, wholesaling in the area had doubled in number and tripled its sales in the past ten years, and with the trend toward decentralization of industry the wholesale trade of the area should continue to increase."-- leaves 1,63