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Poisson Structure And Action-Angle Variables For The Camassa-Holm Equation, Adrian Constantin, Rossen Ivanov Jan 2006

Poisson Structure And Action-Angle Variables For The Camassa-Holm Equation, Adrian Constantin, Rossen Ivanov

Articles

The Poisson brackets for the scattering data of the Camassa-Holm equation are computed. Consequently, the action-angle variables are expressed in terms of the scattering data.


A Comparative Test Of Brillouin Amplification And Erbium-Doped Fiber Amplification For The Generation Of Millimeter Waves With Low Phase Noise Properties, Markus Junker, Max Ammann, Andreas Schwarzbacher, Jens Klinger, Kai-Utwe Lauterback, Thomas Schneider Jan 2006

A Comparative Test Of Brillouin Amplification And Erbium-Doped Fiber Amplification For The Generation Of Millimeter Waves With Low Phase Noise Properties, Markus Junker, Max Ammann, Andreas Schwarzbacher, Jens Klinger, Kai-Utwe Lauterback, Thomas Schneider

Articles

Measurements of phase noise of a 40-GHz carrier signal are presented. The carrier is generated by the amplification of harmonics due to stimulated Brillouin scattering. An analogy to a generation of millimeter waves by an erbium-doped fiber instead of the Brillouin amplifier is investigated and discussed. In our setup, both show a comparable behavior in respect to their noise characteristics.


Quarter-Wave Metal Plate Solar Antenna, S. Shynu, Max Ammann, Brian Norton Jan 2006

Quarter-Wave Metal Plate Solar Antenna, S. Shynu, Max Ammann, Brian Norton

Articles

A novel design of a quarter-wave shorted trapezoidal metal plate solar antenna using high efficiency polycrystalline silicon solar cells is presented. Using the DC conductive parts of the cell as RF antenna elements as well as choosing the radiating element to be a small base trapezoid, better coupling between the the feed and shorting plates is ensured and 40.3% size reduction compared to a conventional shorted quarter-wave patch is obtained. The trapezoidal radiating element covers merely 2.7% of the total available illumination area of the solar cell, leaving its efficiency essentially unaffected. The proposed design strategy has been verified by …


Compact Concentric Annular-Ring Patch Antenna For Triple Frequency Operation, Xiulong Bao, Max Ammann Jan 2006

Compact Concentric Annular-Ring Patch Antenna For Triple Frequency Operation, Xiulong Bao, Max Ammann

Articles

A novel single-layer, single-feed concentric annular-ring microstrip patch antenna providing triple-frequency operation is proposed and experimentally studied. This is achieved by embedding a small circular patch into a dual stub-loaded concentric annular-ring structure and by employing a cross-slot in the ground plane. The proposed technique can provide triple-band operation and reduce the antenna size by over 50% compared to the conventional annular-ring patch antenna for a given frequency. Experimental results show the proposed antenna to have impedance bandwidths of 6.38, 6.30 and 35% for the three bands, at 1.17, 1.428 and 1.9 GHz, respectively. The proposed structure is capable of …


From L-Shaped Planar Monopoles To A Novel Folded Antenna With Wide Bandwidth, Giuseppe Ruvio, Max Ammann Jan 2006

From L-Shaped Planar Monopoles To A Novel Folded Antenna With Wide Bandwidth, Giuseppe Ruvio, Max Ammann

Articles

A novel folded monopole antenna is investigated numerically and experimentally. The proposed antenna comprises a short folded monopole suitably shaped at the base with two vertical grounding probes. This small antenna is shown to have a fractional impedance bandwidth up to 125% (1.6 GHz to 7.5 GHz) for a 10 dB return loss. An interesting compromise between impedance bandwidth and pattern control is found by tuning a double side bevel at the base of the monopole, the position of the feeding point and its distance from the ground plane. Measurements and simulations are in good agreement and show a dramatic …


All-Fiber Multimode-Interference-Based-Refractometer Sensor:Proposal And Design, Qian Wang, Gerald Farrell Jan 2006

All-Fiber Multimode-Interference-Based-Refractometer Sensor:Proposal And Design, Qian Wang, Gerald Farrell

Articles

A novel all-fiber refractometer sensor is proposed, which is based on multimode interference in the multimode fiber core section sandwiched between two single-mode fibers. A wide-angle beam propagation method in the cylindrical coordinate is employed as the modeling tool for simulation and design of the proposed refractometer sensor. The design for a refractometer is presented that shows that the refractometer would have an estimated resolution of 5.4×10−5 for refractive indices from 1.33 to 1.45 and of 3.3×10−5 for refractive indices from 1.38 to 1.45 through the choice of an appropriate length of the multimode fiber core section.


Analysis Of Strain And Intermixing In Single-Layer Ge/Si Quantum Dots Using Polarized Raman Spectroscopy, Anna Baranov, A. V. Federov, Tatiana Perova, R. A. Moore, V. Yam, D. Bouchier, V. Le Thanh, Kevin Berwick Jan 2006

Analysis Of Strain And Intermixing In Single-Layer Ge/Si Quantum Dots Using Polarized Raman Spectroscopy, Anna Baranov, A. V. Federov, Tatiana Perova, R. A. Moore, V. Yam, D. Bouchier, V. Le Thanh, Kevin Berwick

Articles

The built-in strain and composition of as-grown and Si-capped single layers of Ge∕Si dots grown at various temperatures (460–800 °C) are studied by a comparative analysis of the Ge-Ge and Si-Ge modes in the polarized Raman spectra of the dots. A pronounced reduction of the strain and Ge content in the dots after deposition of the cap layer at low temperatures is observed, indicating that strain-induced Si diffusion from the cap layer is occurring. For large dots grown at 700–800 °C the observations are in agreement with a model of the Ge∕Si dot consisting of a Si-rich boundary region and …


Design Of One-Dimensional Composite Photonic Crystals With An Extended Photonic Band Gap, Vladimir Tolmachev, Kevin Berwick Jan 2006

Design Of One-Dimensional Composite Photonic Crystals With An Extended Photonic Band Gap, Vladimir Tolmachev, Kevin Berwick

Articles

A technique for photonic band gap (PBG) extension based on mixing photonic crystals with different lattice constants or filling factors is suggested. For the design of photonic crystals with maximal PBG extension the gap map imposition method is utilized. Gap maps for composite photonic crystals based on Si-air structures are calculated and used to predict optimal structures for fabrication.


Fta And The City: Imagineering Sustainable Urban Development, John Ratcliffe, Elzbieta Krawczyk, Ruth Kelly Jan 2006

Fta And The City: Imagineering Sustainable Urban Development, John Ratcliffe, Elzbieta Krawczyk, Ruth Kelly

Articles

This paper argues that urban planners and policy-makers lack an effective future-oriented approach enabling them to comprehend current complexity, anticipate impending change and shape a preferred future condition. In doing so it: - reviews the performance of contemporary city planning; - examines the need to chart and navigate the city technosphere by reference to city capital; - explores ways in which planning can benefit from a futures studies approach; - describes generally how futures-oriented thinking can produce effective city prospective; and, - poses specifically a number of questions regarding the concept of the intelligent city’. The paper concludes by calling …


Smart Growth: A Buffer Zone Between Decentrist And Centrist Theory?, Dorothy Stewart, Lorcan Sirr, Ruth Kelly Jan 2006

Smart Growth: A Buffer Zone Between Decentrist And Centrist Theory?, Dorothy Stewart, Lorcan Sirr, Ruth Kelly

Articles

The context for planning at the turn of the 19th century, in a newly industrialized world, was based on the need to find solutions to overcrowding and dire urban conditions. Planning decisions made in the post-World War II period were primarily motivated by the desire to reconstruct war torn cities. The forces of influence for planning and development in modern advanced capitalist societies are arguably set within the context of sustainable development. Many developed countries have witnessed a dramatic change in their territorial structures. Urban centres are extending into rural areas and surrounding hinterland, where large tracts of land are …


A Dose Threshold For A Medium Transfer Bystander Effect For A Human Skin Cell Line, Zhengfeng Liou, Carmel Mothersill, Fiona Mcneill, Fiona Lyng, Soo Hyun Byun, Colin Seymour, William Prestwich Jan 2006

A Dose Threshold For A Medium Transfer Bystander Effect For A Human Skin Cell Line, Zhengfeng Liou, Carmel Mothersill, Fiona Mcneill, Fiona Lyng, Soo Hyun Byun, Colin Seymour, William Prestwich

Articles

The existence of radiation-induced bystander effects mediated by diffusible factors is now accepted but the mechanisms and precise behavior at low doses remain unclear. We exposed cells to gamma doses in the range 0.04 mGy – 5 Gy, harvested the culture medium and transferred it to unirradiated reporter cells. Calcium fluxes and clonogenic survival were measured in the recipients. We show evidence for a dose threshold around 2 mGy for the human skin cell line used with a suggestion of increased survival below that dose. Similar experiments using direct gamma irradiation showed no reduction in survival until the dose exceeded …


Development Of A Calix[4]Arene Sensor For Soft Metals Based On Nitrile Functionality, Benjamin Schazmann, Dermot Diamond Jan 2006

Development Of A Calix[4]Arene Sensor For Soft Metals Based On Nitrile Functionality, Benjamin Schazmann, Dermot Diamond

Articles

The current work is amongst the first to examine the potential usefulness of the nitrile functional group in potentiometric analytical sensors for soft metals. Nitrile functionality has hereby been incorporated into a calix[4]arene skeleton to give a series of new cation selective hosts. The analytical sensing behaviour of these hosts was examined by Ion Selective Electrode (ISE) based potentiometry. In all cases a preference for soft metals was observed, explained primarily in terms of soft–soft compatibility between calix[4]arene nitrile hosts and metal guests in combination with a classical ‘lock and key’ best fit mechanism. Hosts 2, 3 and 4 showed …


An Explicit Scheme For Multifluid Magnetohydrodynamics, Stephen O'Sullivan, Turlough Downes Jan 2006

An Explicit Scheme For Multifluid Magnetohydrodynamics, Stephen O'Sullivan, Turlough Downes

Articles

When modelling astrophysical fluid flows, it is often appropriate to discard the canonical magnetohydrodynamic approximation, thereby freeing the magnetic field to diffuse with respect to the bulk velocity field. As a consequence, however, the induction equation can become problematic to solve via standard explicit techniques. In particular, the Hall diffusion term admits fast-moving whistler waves which can impose a vanishing time-step limit.Within an explicit differencing framework, a multifluid scheme for weakly ionized plasmas is presented which relies upon a new approach to integrating the induction equation efficiently. The first component of this approach is a relatively unknown method of accelerating …


Inverse Scattering Transform For The Camassa-Holm Equation, Adrian Constantin, Vladimir Gerdjikov, Rossen Ivanov Jan 2006

Inverse Scattering Transform For The Camassa-Holm Equation, Adrian Constantin, Vladimir Gerdjikov, Rossen Ivanov

Articles

An Inverse Scattering Method is developed for the Camassa-Holm equation. As an illustration of our approach the solutions corresponding to the reflectionless potentials are constructed in terms of the scattering data. The main difference with respect to the standard Inverse Scattering Transform lies in the fact that we have a weighted spectral problem. We therefore have to develop different asymptotic expansions.


Including Embodied Energy Considerations At The Conceptual Stage Of Building Design, Y. Yohanis, Brian Norton Jan 2006

Including Embodied Energy Considerations At The Conceptual Stage Of Building Design, Y. Yohanis, Brian Norton

Articles

Elevated operating temperatures reduce the solar to electrical conversion efficiency of building integrated photovoltaic devices (BIPV). Phase change materials (PCM) can be used to passively limit this temperature rise although their effectiveness is limited by their low thermal conductivities and by crystallization segregation during solidification. This paper presents an experimental evaluation of the effects of convection and crystalline segregation in a PCM as a function of efficiency of heat transfer within the finned PV/PCM system. The thermal performances of bulk PCM with crystallization segregation for different internal fin arrangements are presented. It is noted that the addition of internal fins …


Information Society Challenges To Financial Regulation, Caroline Bradley Jan 2006

Information Society Challenges To Financial Regulation, Caroline Bradley

Articles

No abstract provided.


Inheritance Law In Tanzania: The Impoverishment Of Widows And Daughters, Tamar Ezer Jan 2006

Inheritance Law In Tanzania: The Impoverishment Of Widows And Daughters, Tamar Ezer

Articles

No abstract provided.


Constructing International Law In The East Indian Seas: Property, Sovereignty, Commerce And War In Hugo Grotius' De Iure Praedae - The Law Of Prize And Booty, Or On How To Distinguish Merchants From Pirates, Ileana Porras Jan 2006

Constructing International Law In The East Indian Seas: Property, Sovereignty, Commerce And War In Hugo Grotius' De Iure Praedae - The Law Of Prize And Booty, Or On How To Distinguish Merchants From Pirates, Ileana Porras

Articles

No abstract provided.


The Death Penalty's Future: Charting The Crosscurrents Of Declining Death Sentences And The Mcveigh Factor, Scott E. Sundby Jan 2006

The Death Penalty's Future: Charting The Crosscurrents Of Declining Death Sentences And The Mcveigh Factor, Scott E. Sundby

Articles

No abstract provided.


The Plural Of Anecdote Is "Blog", A. Michael Froomkin Jan 2006

The Plural Of Anecdote Is "Blog", A. Michael Froomkin

Articles

No abstract provided.


George P. Fletcher And Steve Sheppard, American Law In A Global Context: The Basics. Oxford And New York, Oxford University Press 2005 (Book Review), Janet Stearns Jan 2006

George P. Fletcher And Steve Sheppard, American Law In A Global Context: The Basics. Oxford And New York, Oxford University Press 2005 (Book Review), Janet Stearns

Articles

No abstract provided.


Latcrit X Afterword: Beyond The First Decade: A Forward-Looking History Of Latcrit Theory, Community And Praxis, Berta Hernandez-Truyol, Angela Harris, Francisco Valdes Jan 2006

Latcrit X Afterword: Beyond The First Decade: A Forward-Looking History Of Latcrit Theory, Community And Praxis, Berta Hernandez-Truyol, Angela Harris, Francisco Valdes

Articles

No abstract provided.


The Locus Of Corporate Scienter, Patricia S. Abril, Ann M. Olazabal Jan 2006

The Locus Of Corporate Scienter, Patricia S. Abril, Ann M. Olazabal

Articles

No abstract provided.


The Fall Of Legal Ethics And The Rise Of Risk Management, Anthony V. Alfieri Jan 2006

The Fall Of Legal Ethics And The Rise Of Risk Management, Anthony V. Alfieri

Articles

No abstract provided.


Scientific Secrecy And "Spin": The Sad, Sleazy Saga Of The Trials Of Remune, Susan Haack Jan 2006

Scientific Secrecy And "Spin": The Sad, Sleazy Saga Of The Trials Of Remune, Susan Haack

Articles

No abstract provided.


Child Marriage And Guardianship In Tanzania: Robbing Girls Of Their Childhood And Infantilizing Women, Tamar Ezer, Kate Kerr, Kara Major, Aparna Polavarapu, Tina Tolentino Jan 2006

Child Marriage And Guardianship In Tanzania: Robbing Girls Of Their Childhood And Infantilizing Women, Tamar Ezer, Kate Kerr, Kara Major, Aparna Polavarapu, Tina Tolentino

Articles

No abstract provided.


Detaining Due Process: The Need For Procedural Reform In Joseph Hearings After Demore V. Kim, Shalini Bhargava Ray Jan 2006

Detaining Due Process: The Need For Procedural Reform In Joseph Hearings After Demore V. Kim, Shalini Bhargava Ray

Articles

No abstract provided.


Less Is More - Textualism, Intentionalism, And A Better Solution To The Class Action Fairness Act's Appellate Deadline Riddle, Adam Steinman Jan 2006

Less Is More - Textualism, Intentionalism, And A Better Solution To The Class Action Fairness Act's Appellate Deadline Riddle, Adam Steinman

Articles

No abstract provided.


Weighing And Reweighing Eminent Domain's Political Philosophies Post-Kelo, Alberto B. Lopez Jan 2006

Weighing And Reweighing Eminent Domain's Political Philosophies Post-Kelo, Alberto B. Lopez

Articles

No abstract provided.


The Man, The State And You: The Role Of The State In Regulating Gender Hierarchies, Meredith M. Render Jan 2006

The Man, The State And You: The Role Of The State In Regulating Gender Hierarchies, Meredith M. Render

Articles

This paper begins with the thesis that an andocentric-assimilation model of women's liberation both has affected workplace outcomes for women and has desensitized us to those outcomes. The paper then applies that thesis to understandings of "equality" within a hierarchical framework, arguing that the equality-liberty dichotomy is false in the context of gender discrimination in the workplace. Instead the paper argues that disparate treatment is a liberty concern. In seeking to have our professional fates married to the fates of our male colleagues - which is what workplace equality doctrines aim to do - women are seeking to be only …