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Spectral Shifts And Switches In Random Fields Upon Interaction With Negative-Phase Materials, Zhisong Tong, Olga Korotkova 2010 University of Miami

Spectral Shifts And Switches In Random Fields Upon Interaction With Negative-Phase Materials, Zhisong Tong, Olga Korotkova

Physics Articles and Papers

Spectral shifts in stochastic beam-like fields on interaction with layers of positive- and negative-phase materials are examined on the basis of the ABCD-matrix approach and generalized Huygens-Fresnel principle. It is found that boundaries between such materials may cause spectral switches. Effect of absorption of negative-phase materials on the beam spectrum is discussed. Our results may find applications in connection with spectrum-selection optical interconnects, spectrally encoded information transfer, image formation in systems involving negative-phase materials, and geometrically tunable metamaterials.


Insights Into Rock-Ice Avalanche Dynamics By Combined Analysis Of Seismic Recordings And A Numerical Avalanche Mode, Demian Schneider, Perry Bartelt, Jacqueline Caplan-Auerbach, Marc Christen, Christian Huggel, Brian W. McArdell 2010 Western Washington University

Insights Into Rock-Ice Avalanche Dynamics By Combined Analysis Of Seismic Recordings And A Numerical Avalanche Mode, Demian Schneider, Perry Bartelt, Jacqueline Caplan-Auerbach, Marc Christen, Christian Huggel, Brian W. Mcardell

Geology Faculty Publications

Rock‐ice avalanches larger than 1 × 106 m3 are high‐magnitude, low‐frequency events that may occur in all ice‐covered, high mountain areas around the world and can cause extensive damage if they reach populated regions. The temporal and spatial evolution of the seismic signature from two events was analyzed, and recordings at selected stations were compared to numerical model results of avalanche propagation. The first event is a rock‐ice avalanche from Iliamna volcano in Alaska which serves as a “natural laboratory” with simple geometric conditions. The second one originated on Aoraki/Mt. Cook, New Zealand ...


Stochastic Electromagnetic Beams In Positive-And Negative-Phase Materials, Zhisong Tong, Olga Korotkova 2010 University of Miami

Stochastic Electromagnetic Beams In Positive-And Negative-Phase Materials, Zhisong Tong, Olga Korotkova

Physics Articles and Papers

Theoretical analysis of interaction of stochastic electromagnetic beamlike fields with positive- and negative-phase materials suggests that suitable combinations of such materials can serve as media where spectral, coherence, and polarization properties of beams can self-reconstruct.


Theory Of Weak Scattering Of Stochastic Electromagnetic Fields From Deterministic And Random Media, Zhisong Tong, Olga Korotkova 2010 University of Miami

Theory Of Weak Scattering Of Stochastic Electromagnetic Fields From Deterministic And Random Media, Zhisong Tong, Olga Korotkova

Physics Articles and Papers

The theory of scattering of scalar stochastic fields from deterministic and random media is generalized to the electromagnetic domain under the first-order Born approximation. The analysis allows for determining the changes in spectrum, coherence, and polarization of electromagnetic fields produced on their propagation from the source to the scattering volume, interaction with the scatterer, and propagation from the scatterer to the far field. An example of scattering of a field produced by a δ-correlated partially polarized source and scattered from a δ-correlated medium is provided.


Side By Side Measurements Of Co2 By Ground-Based Fourier Transform Spectrometry (Fts), Janina Messerschmidt, Ronald Macatangay, Justus Notholt, Christof Petri, Thorsten Warneke, Christine Weinzierl 2010 University of Bremen

Side By Side Measurements Of Co2 By Ground-Based Fourier Transform Spectrometry (Fts), Janina Messerschmidt, Ronald Macatangay, Justus Notholt, Christof Petri, Thorsten Warneke, Christine Weinzierl

Faculty of Science - Papers (Archive)

High resolution solar absorption Fourier transform spectrometry (FTS) is the most precise ground-based remote sensing technique to measure the total column of atmospheric carbon dioxide. For carbon cycle studies as well as for the calibration and validation of spaceborne sensors the instrumental comparability of FTS systems is of critical importance. Retrievals from colocated measurements by two identically constructed FTS systems have been compared for the first time. Under clear sky conditions a precision for the retrieved xCO2 better than ∼0.1% is demonstrated and the instruments agree within ∼0.07%. An important factor in achieving such good comparability of the ...


Recent And Future Warm Extreme Events And High-Mountain Slope Stability, C. Huggel, N. Salzmann, S. Allen, Jacqueline Caplan-Auerbach, L. Fischer, W. Haeberli, C. Larsen, D. Schneider, R. Wessels 2010 Western Washington University

Recent And Future Warm Extreme Events And High-Mountain Slope Stability, C. Huggel, N. Salzmann, S. Allen, Jacqueline Caplan-Auerbach, L. Fischer, W. Haeberli, C. Larsen, D. Schneider, R. Wessels

Geology Faculty Publications

The number of large slope failures in some high-mountain regions such as the European Alps has increased during the past two to three decades. There is concern that recent climate change is driving this increase in slope failures, thus possibly further exacerbating the hazard in the future. Although the effects of a gradual temperature rise on glaciers and permafrost have been extensively studied, the impacts of short-term, unusually warm temperature increases on slope stability in high mountains remain largely unexplored. We describe several large slope failures in rock and ice in recent years in Alaska, New Zealand and the European ...


An Assessment Of Factors Affecting Population Growth Of The Mountain Plover, Stephen J. Dinsmore, Michael B. Wunder, Victoria J. Dreitz, Fritz L. Knopf 2010 Iowa State University

An Assessment Of Factors Affecting Population Growth Of The Mountain Plover, Stephen J. Dinsmore, Michael B. Wunder, Victoria J. Dreitz, Fritz L. Knopf

Natural Resource Ecology and Management Publications

Effective conservation measures should target the most sensitive life history attributes of a species, assuming they are responsive to potential management actions. The Mountain Plover (Charadrius montanus) is a species of conservation concern with a patchy breeding distribution in western North America. Plovers prefer areas with short vegetation, bare ground, and disturbance for nesting. Current management tools, including grazing and burning, have been used to attract plovers and enhance nesting success. We used a stage-specific matrix model to study the influence of vital rates, e.g., juvenile and adult annual survival, on population growth rate in the Mountain Plover at ...


Selective Adsorption Of Dibenzothiophenes On Activated Carbons With Metal Species Deposited On Their Surfaces, Jakub Lison 2010 CUNY City College

Selective Adsorption Of Dibenzothiophenes On Activated Carbons With Metal Species Deposited On Their Surfaces, Jakub Lison

Dissertations and Theses

"The objective of this thesis is an investigation of influence of porosity, surface chemistry, material composition and effects of metals oncarbon adsorbents in desulfurization of liquid fuels. Materials are derived from poly (4-styrenesulfonic acid-co-maleic acid) salts (sodium or transition metals). They are investigated in a dynamic breakthrough process using model diesel fuel containing dibenzothiophene (DBT) and 4, 6-dimethyldibenzothiophene (DMDBT). The performance of adsorbents is evaluated in terms of the capacity and selectivity. Differences in performance are investigated considering the porosity, surface chemistry and the type of material used."


Modular Synthesis Of Weinreb Amides Of 2-Fluoro-2,4-Dienoic Acids, Mohammad Chowdhury 2010 CUNY City College

Modular Synthesis Of Weinreb Amides Of 2-Fluoro-2,4-Dienoic Acids, Mohammad Chowdhury

Dissertations and Theses

No abstract provided.


Ditopic Dithiophosphonates And Their Related Rotaxanes, Robert Ray Baum Jr. 2010 Eastern Illinois University

Ditopic Dithiophosphonates And Their Related Rotaxanes, Robert Ray Baum Jr.

Masters Theses

No abstract provided.


The Longitude Problem From The 1700s To Today: An International And General Education Physics Course, Thomas J. Bensky 2010 California Polytechnic State University - San Luis Obispo

The Longitude Problem From The 1700s To Today: An International And General Education Physics Course, Thomas J. Bensky

Physics

For instructors wishing to use physics as part of an international or general education course, the framework for a course based on the “longitude problem” from the 1700s is described. The longitude problem is teeming with basic principles of physics and astronomy, which makes it ideal for a non-science-major-based college-level course. This paper summarizes the longitude problem in the context of conceptual physics and astronomy and outlines an appropriate curriculum. Specifics on teaching such a course in London, as part of an international studies program, are discussed.


Computer-Guided Solutions To Physics Problems Using Prolog, Thomas J. Bensky, Catherine A. Taff 2010 California Polytechnic State University - San Luis Obispo

Computer-Guided Solutions To Physics Problems Using Prolog, Thomas J. Bensky, Catherine A. Taff

Physics

By posing a continual stream of pertinent questions, a nonmathematical computer program can prod freshman physics students toward an analytical solution to one-dimensional kinematics problems.


Ancient Dna Analyses Exclude Humans As The Driving Force Behind Late Pleistocene Musk Ox (Ovibos Moschatus) Population Dynamics, Paula F. Campos, Eske Willerslev, Andrei Sher, Ludovic Orlando, Erik Axelsson, Alexei Tikhonov, Kim Aaris-Sorensen, Alex D. Greenwood, Ralf-Dietrich Kahlke, Pavel Kosintsev 2010 Old Dominion University

Ancient Dna Analyses Exclude Humans As The Driving Force Behind Late Pleistocene Musk Ox (Ovibos Moschatus) Population Dynamics, Paula F. Campos, Eske Willerslev, Andrei Sher, Ludovic Orlando, Erik Axelsson, Alexei Tikhonov, Kim Aaris-Sorensen, Alex D. Greenwood, Ralf-Dietrich Kahlke, Pavel Kosintsev

Biological Sciences Faculty Publications

The causes of the late Pleistocene megafaunal extinctions are poorly understood. Different lines of evidence point to climate change, the arrival of humans, or a combination of these events as the trigger. Although many species went extinct, others, such as caribou and bison, survived to the present. The musk ox has an intermediate story: relatively abundant during the Pleistocene, it is now restricted to Greenland and the Arctic Archipelago. In this study, we use ancient DNA sequences, temporally unbiased summary statistics, and Bayesian analytical techniques to infer musk ox population dynamics throughout the late Pleistocene and Holocene. Our results reveal ...


The Effect Of Knowledge Sharing On The Environmental Performance Of Proactive Environmental Organisations, Sean Alexander Moore 2010 Southern Cross University

The Effect Of Knowledge Sharing On The Environmental Performance Of Proactive Environmental Organisations, Sean Alexander Moore

Theses

This research explored the relationship between overall knowledge sharing ability and environmental performance ability in organisations that had adopted an environmentally proactive strategy in relation to their organisation’s impact on the natural environment. The impact organisations have on the natural environment or their environmental performance has received increasing attention in the strategic management literature. The realisation that industry is negatively affecting the natural environment has led to increased government regulation and stakeholder pressures. In response to these increased pressures many organisations have begun to actively manage their relationship with the environment. Some organisations have taken a proactive environmental stance ...


The Natural History, Conservation Status And Ecology Of The Eastern Pygmy-Possum (Cercartetus Nanus), Jamie Mark Harris 2010 Southern Cross University

The Natural History, Conservation Status And Ecology Of The Eastern Pygmy-Possum (Cercartetus Nanus), Jamie Mark Harris

Theses

Many populations of Australian wildlife appear to be diminishing as human activities rapidly encroach on natural areas. Modern conservation efforts seek to provide management solutions, focussing particularly on those species that are officially classed as threatened. However, knowledge of the true status of most species is glaringly incomplete, with fundamental information about distribution and abundance yet to be properly assembled. Hence, there is an increasing need for applied research, particularly on the under-studied species, to assist efforts to conserve wildlife. The eastern pygmy-possum (Cercartetus nanus) provides a good example of a species that requires further study, particularly because it is ...


Applying Paleolimnological Techniques To Sub-Tropical East Australian Estuaries, Brendan Logan 2010 Southern Cross University

Applying Paleolimnological Techniques To Sub-Tropical East Australian Estuaries, Brendan Logan

Theses

This thesis examines the application of paleolimnological techniques, pioneered and developed predominately in northern hemisphere freshwater environments, to sub-tropical east Australian estuaries. The aim of this research was to determine how successfully these techniques - in particular those related to coring, dating, diatom analysis and stable isotope analysis – can be either applied or adapted to the estuarine environment to reconstruct nutrient levels in the absence of monitoring data. This will allow pre-impact environmental conditions of estuaries to be determined, which in turn will aid future management decisions.

Fifty-two estuaries from a spatially large geographic area were initially sampled, to create a ...


Trust-Oriented Composite Service Selection With Qos Constraints, Lei LI, Yang WANG, Ee Peng LIM 2010 Singapore Management University

Trust-Oriented Composite Service Selection With Qos Constraints, Lei Li, Yang Wang, Ee Peng Lim

Research Collection School Of Information Systems

In Service-Oriented Computing (SOC) environments, service clients interact with service providers for consuming services. From the viewpoint of service clients, the trust level of a service or a service provider is a critical factor to consider in service selection, particularlywhen a client is looking for a service from a large set of services or service providers. However, a invoked service may be composed of other services. The complex invocations in composite services greatly increase the complexity of trust-oriented service selection. In this paper, we propose novel approaches for composite service representation, trust evaluation and trust-oriented com-posite service selection (with QoS ...


A Golden Garment? Identifying New Ways Of Looking At The Past Through A Preliminary Report Of Textile Fragments From The Pafos ‘Erotes’ Sarcophagus, Adriana Garcia, Diana Wood Conroy 2010 University of Wollongong

A Golden Garment? Identifying New Ways Of Looking At The Past Through A Preliminary Report Of Textile Fragments From The Pafos ‘Erotes’ Sarcophagus, Adriana Garcia, Diana Wood Conroy

Faculty of Science - Papers (Archive)

A golden garment? A preliminary report of textile fragments from the Pafos ‘Erotes’ Sarcophagus Diana Wood Conroy and Adriana Garcia Remnants of very fine gold thread and reddish fibre were found among bone fragments in the ‘pillow’ end of the interior of the Pafos marble sarcophagus in 2001. The placement of the threads suggested a cloth laid over the upper part of the body. The excavator, Dr Eustathios Raptou has described how the sarcophagus had been looted in antiquity, leaving only one jewel and a finial from what must have been rich funerary goods. The textile fragments demonstrated the opulence ...


Development Of A Regional Habitat Classification Scheme For The Amirante Islands, Seychelles, Sarah Hamylton, Tom Spencer, Annelise Hagan 2010 University of Wollongong

Development Of A Regional Habitat Classification Scheme For The Amirante Islands, Seychelles, Sarah Hamylton, Tom Spencer, Annelise Hagan

Faculty of Science - Papers (Archive)

A collaborative expedition between Khaled bin Sultan Living Oceans Foundation, Cambridge Coastal Research Unit and Seychelles Centre for Marine Research and Technology – Marine Parks Authority (SCMRT-MPA) was conducted to the southern Seychelles, western Indian Ocean, in January 2005. This resulted in a series of habitat maps of the reefs and reef islands of the Amirantes Archipelago, derived from remotely-sensed Compact Airborne Spectrographic Imager (CASI) data. The procedures used in map development, image processing techniques and field survey methods are outlined. Habitat classification, and regional-scale comparisons of relative habitat composition are described. The study demonstrates the use of remote sensing data ...


Carboxymethylated-K-Casein: A Convenient Tool For The Identification Of Polyphenolic Inhibitors Of Amyloid Fibril Formation, John A. Carver, Peter J. Duggan, Heath Ecroyd, Yanqin Liu, Adam G. Meyer, C E. Tranberg 2010 University of Wollongong

Carboxymethylated-K-Casein: A Convenient Tool For The Identification Of Polyphenolic Inhibitors Of Amyloid Fibril Formation, John A. Carver, Peter J. Duggan, Heath Ecroyd, Yanqin Liu, Adam G. Meyer, C E. Tranberg

Faculty of Science - Papers (Archive)

Reduced and carboxymethylated-κ-casein (RCM-κ-CN) is a milk-derived amyloidogenic protein that readily undergoes nucleation-dependent aggregation and amyloid fibril formation via a similar pathway to disease-specific amyloidogenic peptides like amyloid beta (Aβ), which is associated with Alzheimer’s disease. In this study, a series of flavonoids, many known to be inhibitors of Aβ fibril formation, were screened for their ability to inhibit RCM-κ-CN fibrilisation, and the results were compared with literature data on Aβ inhibition. Flavonoids that had a high degree of hydroxylation and molecular planarity gave good inhibition of RCM-κ-CN fibril formation. IC50 values were between 10- and 200-fold higher with ...


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