214,054 research outputs found
Ellen (Ella) Stack
No full textDate:1941Ella Stack and her family moved to Darwin in 1961. She was first employed for a few weeks mid-1961 by a local GP and then in 1962, Ella took over as long-term locum. She was one of two private practitioners in Darwin. Cyclone Tracy hit Darwin in 1974. Instead of evacuating, she chose to stay and provide medical support and to help with the reconstruction of the city. Dr Stack became a member of the Darwin Reconstruction Commission that enacted a new building code to prevent similar devastation in the future.
In May 1975 she was elected the first woman Mayor of Darwin and with self-government, became Lord Mayor of Darwin in 1979. After stepping down as Lord Mayor in 1980, she completed her Masters of Public Health, joining the Department of Health as the first Assistant Secretary of the Division of Aboriginal Health. It was the first Division devoted entirely to the health of Aboriginals. Later she became Secretary of the Department of Health of the Northern Territory.
Source: Northern Territory dictionary of biography. Darwin : Charles Darwin University Press, 2008.DoctorMayorLord Mayo
Fuel cell stack assembly
No full textAn improved proton exchange membrane fuel cell assembly and fuel cell stack assembly are provided for the economical and efficient production of electricity. The present invention comprises improved flow fields and reactant supply systems, which provide improved and more efficient mass transport of the reactants in the fuel cell and the fuel cell stack assembly. The improved flow fields comprise three-dimensional open-cell foamed metals that are preferably plated with gold. The improved reactant supply system comprises an improved distribution frame to house fuel cells wherein the reactants are directly connected to the improved flow fields.U
Fuel cell stack assembly
No full textDisclosed herein is a novel fuel cell stack assembly. In one embodiment, the stacks of the present invention comprise: a first and a second end plate; a plurality of fuel cells interposed between the first and second end plates, at least one of the fuel cells having a unitized MEA assembly and/or a compound flow field; a means to separate neighboring fuel cell components; and a compression means.U
Apparatus for transporting emissions from a stack
No full textThe apparatus and method of the present invention extract samples of emissions within a stack or duct through the use of a probe. The sample is transported from the probe through a transport device into a mass-monitoring device in which the amount of particulate matter contained in the sample of the emissions is continuously analyzed. The apparatus of the present invention includes a transport device which has a porous inner tube completely sealed inside a solid outer tube. The outer tube of the transport device is supplied with gas through a transpiration port in the outer tube. The gas permeates from the outer tube through the porous inner tube in order to reduce deposition by keeping the particulate matter suspended within the porous inner tube. The method of the present invention continuously analyzes the amount of particulate contained within a sample of the emissions collected from a stack or duct by (i) extracting a sample of particular matter from a stack or duct by using a probe, (ii) transporting the sample of the emissions from the probe through the aforementioned transport device into a mass-monitoring device, while simultaneously supplying a gas into the outside tube of the transport device such that gas flows from the outer tube through the porous inner tube to reduce deposition of particulate matter onto the porous inner tube, and (iii) continuously analyzing the amount of particulate contained in the emissions received from the transport device. Problems associated with deposition of the particulate matter contained within the sample of the emissions after collection by the probe and prior to analysis are reduced with the present invention resulting in greater accuracy when monitoring the amount of particulate matter emitted from a stack.U
Intern experience at CH���M Hill, Inc.: an internship report
Get PDFIncludes author's vita"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical referencesA review of the author's internship experience with CH���M HILL, Inc.
during the period September 1975 through May 1976 is presented. During this nine month
internship the author worked as an Engineer II in the Industrial Processes discipline of this
large consulting engineering firm... The author's prime responsibility was as one of three
lead design engineers on the design of a large wastewater treatment facility for a pulp mill
in Hoquiam, Washington owned by ITT Rayonier Inc. The work generally consisted of the design
of individual treatment units and associated piping and pumping. The purpose of the project
was to provide wastewater treatment capabilities that would satisfy the effluent limitations
(standards) imposed upon the mill by the State of Washington Department of Ecology and the
U.S. Environmental Protection Agency. The author's assignment also entailed necessary
interaction with the project manager and other CH���M HILL design engineers and support staff
members, the client's representatives, and representatives of two other consulting engineering
firms working on the project. Thus, the internship position at CH���M HILL provided considerable
experience coordinating the author's work with the work of other engineers, guiding the design
and administrative efforts of a support staff, and interacting regularly with the client and
other consulting firms. This broad exposure to a variety of engineering and organizational
problems provided a valuable educational experience
A Structured Hardware/Software Architecture for Embedded Sensor Nodes
Get PDFOwing to the limited requirement for sensor processing in early networked sensor nodes, embedded software was generally built around the communication stack. Modern sensor nodes have evolved to contain significant on-board functionality in addition to communications, including sensor processing, energy management, actuation and locationing. The embedded software for this functionality, however, is often implemented in the application layer of the communications stack, resulting in an unstructured, top-heavy and complex stack. In this paper, we propose an embedded system architecture to formally specify multiple interfaces on a sensor node. This architecture differs from existing solutions by providing a sensor node with multiple stacks (each stack implements a separate node function), all linked by a shared application layer. This establishes a structured platform for the formal design, specification and implementation of modern sensor and wireless sensor nodes. We describe a practical prototype of an intelligent sensing, energy-aware, sensor node that has been developed using this architecture, implementing stacks for communications, sensing and energy management. The structure and operation of the intelligent sensing and energy management stacks are described in detail. The proposed architecture promotes structured and modular design, allowing for efficient code reuse and being suitable for future generations of sensor nodes featuring interchangeable components
Stack, D M, Af126-3980
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/418728Surname: STACK. Given Name(s) or Initials: D M. Military Service Number or Last Known Location: AF126-3980. Missing, Wounded and Prisoner of War Enquiry Card Index Number: SEA-2139.242602
Item: [2016.0049.50989] "Stack, D M, Af126-3980
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
Get PDFFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
Energy Efficient Single Stack Exhaust Fan Systems (E3S3F)
Get PDFThis paper first investigates the fan energy
performance of a constant air volume exhaust system.
Two single stack energy efficient exhaust fan systems
(E3S3F) are presented. The E3S3F-I has the static
pressure sensor located at the inlet of the exhaust
fan. It has been found to consume up to 15% less fan
power than conventional constant air volume exhaust
systems. The E3S3F-II uses a variable speed device to
maintain the static pressure at the entrance of the
stack. It consumes up to 60% less fan power than
conventional constant volume exhaust systems
- …
