276 research outputs found
\u27Green\u27 manufacturing: A life cycle inventory of the automotive paint process and protocols for industry application.
In response to growing interest in \u27green\u27 vehicles, Life Cycle Analysis (LCA) and Life Cycle Inventory (LCI) concepts can quantify the automobile\u27s environmental impacts. Potential benefits include Design-for-Environment (DfE) opportunities, increased manufacturing efficiencies, and future application to consumer-based eco-rating systems. Detailed and up-to-date LCI data for general application by LCI practitioners does not exist at this time for the majority of Manufacturing/Assembly processes in North America, including the automotive paint process. With an Original Equipment Manufacturer (OEM) industry partner\u27s commitment to a publicly available LCI database (i.e., NREL LCI Database), however, a representative vehicle assembly facility was selected for completion of a paint process LCI. A detailed LCI reference dataset was developed to include materials, energy, and emissions associated with the Pretreatment, E-coat, and Top Coat paint unit processes. The challenges and industry realities of completing the LCI enabled a detailed set of guidelines to be developed, adapting existing protocols to the specifics of the manufacturing paint process. (Abstract shortened by UMI.)Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2005 .A53. Source: Masters Abstracts International, Volume: 45-01, page: 0386. Thesis (M.A.Sc.)--University of Windsor (Canada), 2005
Signatures for Solar Axions/WISPs
Standard solar physics cannot account for the X-ray emission and other
puzzles, the most striking example being the solar corona mystery. The corona
temperature rise above the non-flaring magnetized sunspots, while the
photosphere just underneath becomes cooler, makes this mystery more intriguing.
The paradoxical Sun is suggestive of some sort of exotic solution, axions being
the (only?) choice for the missing ingredient. We present atypical axion
signatures, which depict solar axions with a rest mass max ~17 meV/c2. Then,
the Sun has been for decades the overlooked harbinger of new particle physics.Comment: To appear in the proceedings of the 6th Patras Workshop, Zurich 5-9
July 201
Solar X-rays from Axions: Rest-Mass Dependent Signatures
The spectral shape of solar X-rays is a power law. The more active the Sun
is, the less steep the distribution. This behaviour can be explained by axion
regeneration to X-rays occurring ~400km deep into the photosphere. Their
down-comptonization reproduces the measured spectral shape, pointing at axions
with rest mass m_a~17 meV/c2, without contradicting astrophysical-laboratory
limits. Directly measured soft X-ray spectra from the extremely quiet Sun
during 2009 (SphinX mission), though hitherto overlooked, fitt the axion
scenario.Comment: To appear in Proceedings of the 5th Patras Axion Workshop, Durham
200
Transforming literacy teaching : a teacher's experience of implementing critical literacy and philosophy for children in a grade three South African classroom.
Philosophy for Children (P4C) and Critical Literacy (CL) are orientations that embrace a socio-cultural perspective to literacy by including the life-worlds of children. They also encourage meta-cognitive thinking by encouraging children to explore written texts. The focus of this qualitative project research was to explore the impact of implementing CL and P4C in a Grade Three classroom using a Community of Enquiry, and the stimulus of a picturebook, The Tunnel by Anthony Browne, (1989). The researcher explored the impact of this intervention on the teacher as well as the children.
The data collection consisted of the teacher’s reflective journal, transcripts from six Communities of Enquiry and the children’s creative writing and artwork in the form of picturebooks. The data collection indicated two main findings. Firstly, teaching in the CoE required a different discourse for the teacher. Secondly, the children’s experience of literacy was enriched by adopting a socio-cultural perspective that enabled them to explore and critique their worlds. The overall positive results indicate that implementing these two approaches enriched the children’s creative, critical and collaborative thinking, while improving relationships in the classroom. Further research could help to broaden and develop the scope of this study as it was a small-scale study in a private, middle class school in Johannesburg
Thissavros Hydropower Plant Managing Geotechnical Problems in the Construction
The Thissavros hydropower and pumped storage project on the Nestos river in northern Greece involved construction of a 172 m high rockfill dam and an underground power house with 300 MW installed capacity. Bedrock at the site consists of gneiss with complex geological structure and complicated hydrogeological conditions. On the right abutment, the dam partially rests on a large landslide and the toe of another large landslide extends into the plunge pool from the left bank. Initial excavations activated the dormant slides. Unloading, buttressing and drainage successfully stabilized the landslides. Core material for the dam is a silty sand and required special precautions in design and construction. Starting with an extremely rapid reservoir filling the dam has performed highly satisfactorily. The power house had to be excavated in a relatively unfavorable geological orientation but application of structural discontinuity analysis avoided wedge failures
Application of Multiprotocol Medical Imaging Communications and an Extended DICOM WADO Service in a Teleradiology Architecture
Multiprotocol medical imaging communication through the Internet is more flexible than the tight DICOM transfers. This paper introduces a modular multiprotocol teleradiology architecture that integrates DICOM and common Internet services (based on web, FTP, and E-mail) into a unique operational domain. The extended WADO service (a web extension of DICOM) and the other proposed services allow access to all levels of the DICOM information hierarchy as opposed to solely Object level. A lightweight client site is considered adequate, because the server site of the architecture provides clients with service interfaces through the web as well as invulnerable space for temporary storage, called as User Domains, so that users fulfill their applications' tasks. The proposed teleradiology architecture is pilot implemented using mainly Java-based technologies and is evaluated by engineers in collaboration with doctors. The new architecture ensures flexibility in access, user mobility, and enhanced data security
Potential for measurement of the tensor electric and magnetic polarizabilities of the deuteron in storage-ring experiments with polarized beams
Measurement of the tensor electric and magnetic polarizabilities of the
deuteron is of great interest, especially in connection with the possibilities
of COSY and GSI. These polarizabilities can be measured in storage rings by the
frozen spin method providing a disappearance of g-2 precession. This method
will be used in the planned deuteron electric-dipole-moment experiment in
storage rings. The tensor electric polarizability of the deuteron significantly
influences the buildup of the vertical polarization in the above experiment.
The spin interactions depending on the electric dipole moment, the tensor
electric polarizability, and main systematical errors caused by field
misalignments have very different symmetries. For the considered experimental
conditions, the sensitivity to the deuteron EDM of cm
corresponds to measuring the both of tensor polarizabilities with an accuracy
of cm. This
conservative estimate can be improved by excluding the systematical error
caused by the field instability which is negligible for the measurement of the
tensor polarizabilities. To find the tensor magnetic polarizability, the
horizontal components of the polarization vector should be measured.Comment: 11 pages, the extended version of the paper prepared for the
Proceedings of 19th International Spin Physics Symposium (September 27 -
October 2, 2010, Julich, Germany
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