Periodic orbit quantization of chaotic systems with strong pruning

The three-disk system, which for many years has served as a paradigm for the usefulness of cycle expansion methods, represents an extremely hard problem to semiclassical quantization when the disks are moved closer and closer together, since (1) pruning of orbits sets in, rendering the symbolic code incomplete, and (2) the number of orbits necessary to obtain accurate semiclassical eigenvalues proliferates exponentially. In this note we show that an alternative method, viz. harmonic inversion, which does not rely on the existence of complete symbolic dynamics or other specific properties of systems, provides a key to solving the problem of semiclassical quantization of systems with strong pruning. For the closed three-disk system we demonstrate how harmonic inversion, augmented by a signal cross-correlation technique, allows one to semiclassically calculate the energies up to the 28th excited state with high accuracy.Comment: 9 pages, 3 figures, submitted to Phys. Lett.

Person to Person in Costa Rica

While still in the midst of their study abroad experiences, students at Linfield College write reflective essays. Their essays address issues of cultural similarity and difference, compare lifestyles, mores, norms, and habits between their host countries and home, and examine changes in perceptions about their host countries and the United States. In this essay, Katie Main describes her observations during her study abroad program at Centro Cultural e Historico Jose Figueres Ferrer, in San Ramón, Costa Rica

Comment on "Recurrences without closed orbits"

In a recent paper Robicheaux and Shaw [Phys. Rev. A 58, 1043 (1998)] calculate the recurrence spectra of atoms in electric fields with non-vanishing angular momentum not equal to 0. Features are observed at scaled actions ``an order of magnitude shorter than for any classical closed orbit of this system.'' We investigate the transition from zero to nonzero angular momentum and demonstrate the existence of short closed orbits with L_z not equal to 0. The real and complex ``ghost'' orbits are created in bifurcations of the ``uphill'' and ``downhill'' orbit along the electric field axis, and can serve to interpret the observed features in the quantum recurrence spectra.Comment: 2 pages, 1 figure, REVTE

PenDraw - A Language for Improving Take-Up of SVG

The case is presented for preferring a dedicated Computer Graphics (CG) language to the traditional conventional language plus add-on. PenDraw is presented as an existing language that overcomes many problems of CG add-ons, providing compile-time checking and reduced need for run-time debugging. PenDraw produces well-formed SVG. Evidence is given that PenDraw decreases development costs. Evidence is presented that PenDraw has brought CG programming to a wider ability range of potential users than professional programmers. It is argued that, given its qualities, PenDraw should be able to improve the take-up of CG programming. Such take-up is expected to be slow at first, given the market-place focus on interactivity and 3D. But it is believed that PenDraw's expressive power and cost benefits should lead to growth in its use, and in use of SVG

Periodic orbit quantization of chaotic maps by harmonic inversion

A method for the semiclassical quantization of chaotic maps is proposed, which is based on harmonic inversion. The power of the technique is demonstrated for the baker's map as a prototype example of a chaotic map.Comment: 7 pages, 1 figure, accepted for publication in Phys. Lett.

Dual Environmentalism: Demand Response Mechanisms in Wholesale and Retail Energy Markets

This note argues that a dual jurisdictional approach to demand response programming is better suited to mitigate environmental harms than an “either-or” regulatory model. Through an exploration of FERC’s authority over wholesale demand response, state authority over retail-level demand response, and implications for electricity and capacity markets arising out of the Court’s decision in FERC v. EPSA, this note will offer effective legal mechanisms for mitigating environmental costs, while fostering environmental benefits. The next section of this note analyzes the strengths and weaknesses of state and federal regulatory approaches to demand response in isolation. Based on this assessment, this note suggests the policy mechanisms most conducive to environmentally-conscious electric energy regulation. This note concludes with a model regulatory scheme that utilizes demand response to mitigate global climate change and advance environmental sustainability

The Procedural Foundation of Substantive Law

The substance-procedure dichotomy is a popular target of scholarly criticism because procedural law is inherently substantive. This article argues that substantive law is also inherently procedural. I suggest that the construction of substantive law entails assumptions about the procedures that will apply when that substantive law is ultimately enforced. Those procedures are embedded in the substantive law and, if not applied, will lead to over- or under-enforcement of the substantive mandate. Yet the substance-procedure dichotomy encourages us to treat procedural systems as essentially fungible-leading to a problem of mismatches between substantive law and unanticipated procedures. I locate this argument about the procedural foundation of substantive law within a broader discussion of the origin and status of the substanceprocedure dichotomy

Maine's lifelong learning accounts: good news for workers, businesses, and the economy

Lifelong Learning Accounts (LiLAs) support current and future workforce needs. LiLA funds differ from tuition reimbursement in several ways: being available before course registration, being portable, and merging employee savings with contributions from both employers and third parties.Labor market - Maine ; Employees, Training of - Maine

Diversity-Konzept 2011–2014 der Goethe-Universität Frankfurt am Main

The “Diversity Concept of the Goethe University Frankfurt am Main 2011–2014” is based on the goals as laid down in the University Development Plan 2011. The Goethe University combined various instruments for working out the concept, not least in order to ensure adequate participation: on the one hand, guided interviews were conducted, for example, with employees in advisory functions, members of the AStA (General Students’ Commit-tee), etc. On the other hand, Internet research, an open space workshop, as well as four strategy and awareness-raising workshops on various topics were organized. The concept was developed in close cooperation with the vice president responsible for gender and diversity, Prof. Dr. Roser Valenti, the Senate Commission “Advancement of Women, Equal Opportunity, and Diversity”, the “Project Supervision Group Diversity Poli-cies”, and the Equal Opportunities Office. The Goethe University already has various concepts and target agreements on gender equal-ity and family support. The Diversity Concept therefore includes no measures on these top-ics. With the expiry of the Plan for the Advancement of Women in 2014, all of the other reports and measures related to equal opportunity and diversity will be consolidated in a central “Gender Equality & Diversity Action Plan of the Goethe University Frankfurt am Main” (GEDAP) and updated every four years.Das »Diversity-Konzept der Goethe-Universität Frankfurt am Main 2011 – 2014« basiert auf den im Hochschulentwicklungsplan 2011 festgelegten Zielen der Universität. Für die Erarbeitung des Konzeptes hat die Goethe-Universität verschiedene Instrumente kombiniert, nicht zuletzt, um eine ausreichende Partizipation zu gewährleisten: So wurden zum einen Leitfadeninterviews mit Beschäftigten in Beratungsfunktionen, Mitgliedern des AStA und anderen geführt. Zum anderen wurden eine Internetrecherche, ein Open-Space-Workshop sowie vier Strategie- und Sensibilisierungs-Workshops mit unterschiedlichen Themenstellungen organisiert. Das Konzept entstand in enger Zusammenarbeit zwischen der für Gleichstellung zuständigen Vizepräsidentin, Prof. Roser Valenti, der Senatskommission »Frauenförderung, Gleichstellung und Diversität«, der »Projektsteuerungsgruppe diversityPolicies« und dem Gleichstellungsbüro. An der Goethe-Universität liegen bereits verschiedene Konzepte und Zielvereinbarungen zur Geschlechtergleichstellung und Familienförderung vor. Das Diversity-Konzept sieht deshalb dazu keine Maßnahmen vor. Mit Auslaufen des Frauenförderplans im Jahr 2014 werden gleichstellungs- und andere diversitätsbezogene Berichte und Maßnahmen in einem zentralen »Gender Equality & Diversity Action Plan« (GEDAP) der Goethe-Universität Frankfurt am Main zusammengefasst und alle vier Jahre fortgeschrieben