114 research outputs found

    RESOLUTION Directing certain committees to continue their ongoing investigations as part of the existing House of Representatives inquiry into whether sufficient grounds exist for the House of Representatives to exercise its Constitutional power to impeach Donald John Trump, President of the United States of America, and for other purposes.

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    RESOLUTION Directing certain committees to continue their ongoing investigations as part of the existing House of Representatives inquiry into whether sufficient grounds exist for the House of Representatives to exercise its Constitutional power to impeach Donald John Trump, President of the United States of America, and for other purposes. Resolved, That the Permanent Select Committee on Intelligence and the Committees on Financial Services, Foreign Affairs, the Judiciary, Oversight and Reform, and Ways and Means, are directed to continue their ongoing investigations as part of the existing House of Representatives inquiry into whether sufficient grounds exist for the House of Representatives to exercise its Constitutional power to impeach Donald John Trump, President of the United States of America. ... The Committee on the Judiciary shall report to the House of Representatives such resolutions, articles of impeachment, or other recommendations as it deems proper

    An Exploration of a Discrete Rhombohedral Lattice of Possible Engineering or Physical Relevance (Revised Version) 2008

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    A particular discrete rhombohedral lattice consisting of four symmetrically interlaced cuboctahedral point lattices is described that is interesting because of the high degree of symmetry it exhibits. The four constituent cuboctahedral lattices are denoted by four colours and the composite lattice is referred to as a 4-colour rhombohedral lattice. Each point of the 4-colour lattice can be referenced by an integer 4-tuple containing only the positive non-zero integers (the counting numbers). The relationship between the discrete rhombohedral lattice and a discrete Cartesian lattice is explained. Some interesting aspects of the lattice and of the counting-number 4-tuple coordinate system are pointed out

    Turning an Articulated Truck on a Spreadsheet

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    This paper describes how a standard office spreadsheet application was used to set up an engineering model for the simulation and analysis of the turning of articulated truck

    Applied Energy Systems - Rudimentary Thermodynamics

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    This is a compact textbook for a module addressing rudimentary thermodynamics within the context of applied energy systems. It is at an introductory level for engineers or technologists. The book does not attempt to cover the principles of thermodynamics comprehensively. Rather, it provides a practical but theoretically sound foundation, linked to some key areas. Energy, heat and work are all introduced, as are units and dimensions. Ideal gases and properties of liquids and vapours are treated. Non-flow and steady flow processes are described. Simple theory is provided for pumps and for the reciprocating compressor. Rudimentary steam and refrigeration or heat pump cycles are explained. Property tables are included. A separate solutions manual is provided

    Applied Energy Systems - Rudimentary Fluid Mechanics

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    This is a compact textbook for a module addressing rudimentary fluid mechanics within the context of applied energy systems. It is at an introductory level for engineers or technologists. The book does not attempt to cover the principles of fluid mechanics comprehensively. Rather, it provides a practical but theoretically sound foundation, linked to two key areas: hydrostatic power transmission systems and the flow of fluids through pipes and fittings. This selection allows the two areas to be presented in some detail. Through this approach learners can put the principles of fluid mechanics into context, while developing their knowledge and understanding. Thus, they are prepared for applying the same and similar principles to a much broader range of practical applications in the future. A separate solutions manual is provided

    Applied Energy Systems: Hydrostatic Fluid Power Transmission and Flow in Pipes

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    This is an intentionally compact textbook or set of notes for a module addressing basic Fluid Mechanics for incompressible fluids within the context of Applied Energy Systems. Rather than attempting to cover Fluid Mechanics in a very broad and general way, two practical areas are selected in the use of fluids: hydrostatic power transmission systems and the flow of fluids through pipes and fittings. This allows the two areas to be presented in some detail, but also allows them to be sample application areas that would enable learners to put the principles of fluid mechanics into context, while developing their knowledge and understanding. Thus learners are prepared for applying the same and similar principles to a much broader range of practical applications in the future

    The Very Basics of Sustainability - an Alternative Viewpoint

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    This paper examines the context and meaning of the term ‘sustainability’, the factors that determine and govern climate on Earth, the population of the Earth and its trends and influencers, the requirements for sustaining life and the options that are available to humankind. Some viewpoints are presented that are alternative to ‘conventional alternative’ thinking. The author advocates keeping an open mind on all available options, including the use of oil, gas, coal, tar sands, carbon capture and sequestration, nuclear power etc., as well as the technologies that are more widely considered ‘green’ and also argues that humankind needs to face up to the population size that the Earth can sustain and the desired sustainable distribution of wealth

    A Suggested Building Block Geometry Without Continuous Radial Joints of Possible Relevance for Particle Detectors

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    A geometry for concentrc shells or tubes, built-up from a single rhombohedral block type, is described. Continuous radial joints are avoided

    On Refrigerant Compressors

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    The purpose of the work was to critically re-examine and investigate the evaluation of refrigerant compressors and to determine and discriminate between the factors which influence their characteristics. The objectives also included the investigation of techniques by which the characteristics can be established and the suggestion of ways in which compressor performance can be described and quantified. The particular compressor which was tested was of the reciprocating open type. Existing theories relating to the efficiency of displacement utilisation are extended to yield an overall framework in which the various influences can be described and quantified. Conventional parameters for the quantification of shaft power utilisation are reviewed critically and alternatives are presented and justified. These alternatives are rational efficiencies based on the Second Law of Thermodynamics. Load stands and specialised measurement techniques for testing refrigerant compressors are reviewed. A design rationale for the load stand which was built and used for compressor testing is presented. The load stand was a bypass type which involved full condensation of part of the flow and a mixing process. The operating conditions of the compressor were controlled by means of throttle valves only. Data illustrating the main characteristics of the compressor which was tested, i.e. mass flow rate, shaft power, discharge temperature and oil concentration in the discharge vapour, are presented over a range of speeds and over a range of suction superheat values. In addition, many parameters of the compressor which underlie its performance characteristics are presented graphically versus speed and versus suction temperature. Dynamic measurements of cylinder pressure and valve displacements are presented, analysed and discussed. The displacement utilisation efficiency of the compressor is presented and the losses in displacement utilisation are quantified discretely under five headings. The test data did not allow full discrimination between heat transfer, leakage and solubility effects within the cylinder and the measurement difficulties are discussed in detail. The concept of a \u27phantom mass\u27 of refrigerant which dissolves and re-emerges from solution in the lubricating oil is conjectured and discussed. The indicated rational efficiency of the compressor is presented graphically. Data describing indicated work, the suction pumping work and the discharge pumping work are also presented, as are data describing the overall heat transfer rate during compression and the time averaged plenum heat transfer rates. It is concluded that thermodynamic availability analysis is essential to the understanding of the factors underlying shaft power utilisation. The outputs of a compressor simulation model are compared with test results. The characteristics of the compressor which was tested were found to be generally favourable for the purposes of capacity control by speed variation. In conclusion, new ways of looking at the utilisation of shaft power and of volume displacement are presented along with many other new ideas relating to the evaluation of refrigerant compressors
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