11 results on '"Hewitt, Mark"'
Search Results
2. An X-ray and neutron scattering study of critical and lattice dynamics
- Author
-
Hewitt, Mark
- Subjects
539.7 - Abstract
The first project was an attempt to test experimentally the conditions under which the impulse approximation (IA) is valid for the dynamic structure factor of a real crystal, where anharmonic effects are significant, and determine the high energy motions in solids. Neutron scattering measurements for a polycrystalline lithium sample were made for wavevector transfers in the range 14 A0-1 to 49 A0-1 at the Rutherford Appleton Laboratory. The wavevector scaling properties of the position of the maximum and width of the scattered neutron distribution suggest that the IA is a good approximation for Q > 25 A0-1 at a sample temperature of 100K. However the width was found to be 14% larger than that calculated using the harmonic model density of phonon states determined by experiment. Numerical calculations for the incoherent dynamic structure factor predicted widths that were in good agreement with those calculated assuming the IA to be valid. It is concluded that either the model density of phonon states is incorrect or a systematic experimental error is present due to the approximation made for the instrumental resolution function. Several theoretical predictions for the power law divergence of the wavevector, magnetic field and energy dependence of the longitudinal magnetic susceptibility for an isotropic ferromagnet below the Curie temperature remain untested. Inelastic neutron scattering measurements were performed at the Institute Laue Langevin for a single crystal of EuO, which is an almost ideal isotropic Heisenberg ferromagnet, in order to test the theoretical predictions. The wavevector dependence of the longitudinal susceptibility was found to be well described by the mean field result and the divergent term concluded to be absent or negligibly small. The energy dependence was found to be quasielastic and was represented empirically by a Lorentzian. The statistical accuracy of the data precluded a detailed test of the longitudinal susceptibility field dependence.
- Published
- 1992
3. Strengthen the European collaborative environmental research to meet European policy goals for achieving a sustainable, non-toxic environment
- Author
-
Brack, Werner, Ait-Aissa, Selim, Backhaus, Thomas, Birk, Sebastian, Barceló, Damià, Burgess, Rob, Cousins, Ian, Dulio, Valeria, Escher, Beate I., Focks, Andreas, van Gils, Jos, Ginebreda, Antoni, Hering, Daniel, Hewitt, Mark, Hilscherová, Klára, Hollender, Juliane, Hollert, Henner, Köck, Marianne, Kortenkamp, Andreas, de Alda, Miren López, Müller, Christin, Posthuma, Leo, Schüürmann, Gerrit, Schymanski, Emma, Segner, Helmut, Sleeuwaert, Frank, Slobodnik, Jaroslav, Teodorovic, Ivana, Umbuzeiro, Gisela, Voulvoulis, Nick, van Wezel, Annemarie, Altenburger, Rolf, Brack, Werner, Ait-Aissa, Selim, Backhaus, Thomas, Birk, Sebastian, Barceló, Damià, Burgess, Rob, Cousins, Ian, Dulio, Valeria, Escher, Beate I., Focks, Andreas, van Gils, Jos, Ginebreda, Antoni, Hering, Daniel, Hewitt, Mark, Hilscherová, Klára, Hollender, Juliane, Hollert, Henner, Köck, Marianne, Kortenkamp, Andreas, de Alda, Miren López, Müller, Christin, Posthuma, Leo, Schüürmann, Gerrit, Schymanski, Emma, Segner, Helmut, Sleeuwaert, Frank, Slobodnik, Jaroslav, Teodorovic, Ivana, Umbuzeiro, Gisela, Voulvoulis, Nick, van Wezel, Annemarie, and Altenburger, Rolf
- Abstract
To meet the United Nations (UN) sustainable development goals and the European Union (EU) strategy for a non-toxic environment, water resources and ecosystems management require cost-efficient solutions for prevailing complex contamination and multiple stressor exposures. For the protection of water resources under global change conditions, specific research needs for prediction, monitoring, assessment and abatement of multiple stressors emerge with respect to maintaining human needs, biodiversity, and ecosystem services. Collaborative European research seems an ideal instrument to mobilize the required transdisciplinary scientific support and tackle the large-scale dimension and develop options required for implementation of European policies. Calls for research on minimizing society’s chemical footprints in the water–food–energy–security nexus are required. European research should be complemented with targeted national scientific funding to address specific transformation pathways and support the evaluation, demonstration and implementation of novel approaches on regional scales. The foreseeable pressure developments due to demographic, economic and climate changes require solution-oriented thinking, focusing on the assessment of sustainable abatement options and transformation pathways rather than on status evaluation. Stakeholder involvement is a key success factor in collaborative projects as it allows capturing added value, to address other levels of complexity, and find smarter solutions by synthesizing scientific evidence, integrating governance issues, and addressing transition pathways. This increases the chances of closing the value chain by implementing novel solutions. For the water quality topic, the interacting European collaborative projects SOLUTIONS, MARS and GLOBAQUA and the NORMAN network provide best practice examples for successful applied collaborative research including multi-stakeholder involvement. They provided innovative conceptual, mode
- Published
- 2019
4. Canon/archive : large-scale dynamics in the literary field
- Author
-
Algee-Hewitt, Mark, Allison, Sarah, Gemma, Marissa, Heuser, Ryan, Moretti, Franco, Walser, Hannah, Algee-Hewitt, Mark, Allison, Sarah, Gemma, Marissa, Heuser, Ryan, Moretti, Franco, and Walser, Hannah
- Abstract
Of the novelties introduced by digitization in the study of literature, the size of the archive is probably the most dramatic: we used to work on a couple of hundred nineteenth-century novels, and now we can analyze thousands of them, tens of thousands, tomorrow hundreds of thousands. It's a moment of euphoria, for quantitative literary history: like having a telescope that makes you see entirely new galaxies. And it's a moment of truth: so, have the digital skies revealed anything that changes our knowledge of literature? This is not a rhetorical question. In the famous 1958 essay in which he hailed "the advent of a quantitative history" that would "break with the traditional form of nineteenth-century history", Fernand Braudel mentioned as its typical materials "demographic progressions, the movement of wages, the variations in interest rates [...] productivity [...] money supply and demand." These were all quantifiable entities, clearly enough; but they were also completely new objects compared to the study of legislation, military campaigns, political cabinets, diplomacy, and so on. It was this double shift that changed the practice of history; not quantification alone. In our case, though, there is no shift in materials: we may end up studying 200,000 novels instead of 200; but, they're all still novels. Where exactly is the novelty?
- Published
- 2016
5. Between canon and corpus: six perspectives on 20th-century novels
- Author
-
Algee-Hewitt, Mark, McGurl, Mark, Algee-Hewitt, Mark, and McGurl, Mark
- Abstract
Of the many, many thousands of novels and stories published in English in the 20th century, which group of several hundred would represent the most reasonable, interesting, and useful subset of the whole?
- Published
- 2015
6. On paragraphs. Scale, themes, and narrative form
- Author
-
Algee-Hewitt, Mark, Heuser, Ryan, Moretti, Franco, Algee-Hewitt, Mark, Heuser, Ryan, and Moretti, Franco
- Abstract
Different scales, different features. It’s the main difference between the thesis we have presented here, and the one that has so far dominated the study of the paragraph. By defining it as "a sentence writ large", or, symmetrically, as "a short discourse", previous research was implicitly asserting the irrelevance of scale: sentence, paragraph, and discourse were all equally involved in the "development of one topic". We have found the exact opposite: 'scale is directly correlated to the differentiation of textual functions'. By this, we don't simply mean that the scale of sentences or paragraphs allows us to "see" style or themes more clearly. This is true, but secondary. Paragraphs allows us to "see" themes, because themes fully "exist" only at the scale of the paragraph. Ours is not just an epistemological claim, but an ontological one: if style and themes and episodes exist in the form they do, it's because writers work at different scales – and do different things according to the level at which they are operating.
- Published
- 2015
7. Alternative rehabilitation techniques and sustainable outcomes from mining using appropriate environmental management and mine closure planning in an arid region of Western Australia
- Author
-
Hewitt, Mark S. and Hewitt, Mark S.
- Abstract
The subject of this thesis is the development of alternative approaches to environmental management and mine closure plans using case examples of the Big Bell/Cue Mining District and as a working example, an area of unconfined washout of historical gold-mine process tailings located in this arid inland region of Western Australia. This is considered appropriate in the light of the social and political thrust for industry to develop simultaneously positive economic, social and environmental outcomes from their activities. The Big Bell mining operation ceased mining in June 2003 and the Mine Closure Plan reflected a classical approach of minimization of public liability and strict compliance with legislative requirements. During the life of the modern mine the approach to rehabilitation was similarly classical in its approach It is intended for this document to inform the mining industry using the case example of the now closed Big Bell Mine as to how greater long-term outcomes may have been achieved for the State and the region for the future. This thesis specifically investigates alternative ways to approach rehabilitation in arid areas of Western Australia using the washout area as an example and trial area. This thesis has approached the issue by addressing the quantification of what has occurred through the gathering of baseline data of the case study area and then by the implementation of a series of relevant trials to identify appropriate eco-functional process-sensitive methods for rehabilitation as an alternative to current industry practice. Trials investigating the use of "retention banks" and "clay/seed balls" and the use of ex-mine milling waste carbon were conducted to investigate relevant possible techniques suitable for arid mine-site waste dump rehabilitation. Data analysis indicated that the main reason for the high level of degradation within the case study area is due to the smothering effect of the fine clayey tails cover and due to acidity of the
- Published
- 2007
8. Time Sensitive Targeting: Overcoming the Intelligence Gap in Interagency Operations
- Author
-
NAVAL WAR COLL NEWPORT RI JOINT MILITARY OPERATIONS DEPT, Hewitt, Mark A., NAVAL WAR COLL NEWPORT RI JOINT MILITARY OPERATIONS DEPT, and Hewitt, Mark A.
- Abstract
The Central Intelligence Agency's attack on a group of terrorists in Yemen epitomized the agency's short-notice capability to detect, track, and destroy a highly mobile and fleeting target of opportunity. The U.S. military and other federal agencies will not respond to terrorist threats overseas where the destruction of the adversary is allowed under the rules of armed combat. These highly mobile threats also may be found in the United States, where the rules of law apply and the target must be apprehended and prosecuted. The Department of Defense (DOD) perceives a time-sensitive target (TST) as an Iraqi mobile SCUD missile launcher, while other agencies view TSTs not as surface-to-air missiles (SAMs) but as humans engaged in a range of quickly moving hostile activities, such as terrorists fleeing in a vehicle. Human targets of interest may be terrorists, drug smugglers, or illegal aliens; they are highly mobile and exploit weaknesses in defense systems. When engaged in hostile or illegal activities, they may be subject to military, diplomatic, economic, intelligence, or law enforcement actions, abroad or in the United States. The present process and capability to detect and identify SCUD-like TSTs lies within the capabilities of DOD and the intelligence community, and national and operational intelligence assets may provide the combatant commander with sufficient data with which to engage TSTs. However, when the source of targets is in or around the United States, and where the lead agency is not the military but a law enforcement agency, strategic and operational intelligence assets are rarely available or used; and if available, are rarely effective. This paper reveals gaps created by a lack of intelligence coordination and interagency cooperation when dealing with TSTs in an interagency environment within the United States. (22 refs.)
- Published
- 2003
9. Classical Architecture: The Poetics of Order, by Alexander Tzonis and Liane Lefaivre; The Classical Orders of Architecture, by Robert Chitham
- Author
-
Hewitt, Mark and Hewitt, Mark
10. Quinlan Terry: The Revival of Architecture, by Clive Aslet
- Author
-
Hewitt, Mark and Hewitt, Mark
11. Distant Readings: Topologies of German Culture in the Long Nineteenth Century
- Author
-
Erlin, Matt, editor, Tatlock, Lynne, editor, Belgum, Kirsten, contributor, Boes, Tobias, contributor, Koepnick, Lutz, contributor, Kontje, Todd, contributor, Mellmann, Katja, contributor, Pethes, Nicolas, contributor, Jannidis, Fotis, contributor, Lauer, Gerhard, contributor, McIsaac, Peter M., contributor, Piper, Andrew, contributor, Algee-Hewitt, Mark, contributor, Riddell, Allen Beye, contributor, Youngman, Paul A., contributor, and Carmichael, Ted, contributor
- Published
- 2014
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.